<?xml version="1.0" encoding="utf-8" ?><gmi:MI_Metadata
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:gco="http://www.isotc211.org/2005/gco"
  xmlns:gfc="http://www.isotc211.org/2005/gfc"
  xmlns:gmd="http://www.isotc211.org/2005/gmd"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:srv="http://www.isotc211.org/2005/srv"
  xmlns:gml="http://www.opengis.net/gml/3.2"
  xmlns:gsr="http://www.isotc211.org/2005/gsr"
  xmlns:gss="http://www.isotc211.org/2005/gss"
  xmlns:gts="http://www.isotc211.org/2005/gts"
  xmlns:gmi="http://www.isotc211.org/2005/gmi"
  xmlns:gmx="http://www.isotc211.org/2005/gmx"
  xsi:schemaLocation="http://www.isotc211.org/2005/gmi https://data.noaa.gov/resources/iso19139/schema.xsd">
  <gmd:fileIdentifier>
    <gco:CharacterString>http://lod.bco-dmo.org/id/dataset/990830</gco:CharacterString>
  </gmd:fileIdentifier>
  <gmd:language>
    <gco:CharacterString>eng; USA</gco:CharacterString>
  </gmd:language>
  <gmd:characterSet>
    <gmd:MD_CharacterSetCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_CharacterSetCode" codeListValue="utf8">utf8</gmd:MD_CharacterSetCode>
  </gmd:characterSet>
  <gmd:hierarchyLevel>
    <gmd:MD_ScopeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ScopeCode" codeListValue="dataset" codeSpace="005">dataset</gmd:MD_ScopeCode>
  </gmd:hierarchyLevel>
  <gmd:hierarchyLevelName>
    <gco:CharacterString>Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project</gco:CharacterString>
  </gmd:hierarchyLevelName>
  <gmd:contact>
    <gmd:CI_ResponsibleParty>
  <gmd:organisationName>
    <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/affiliation/191.rdf" xlink:actuate="onRequest">Biological and Chemical Oceanography Data Management Office (BCO-DMO)</gmx:Anchor>
  </gmd:organisationName>
  <gmd:contactInfo>
    <gmd:CI_Contact>
		  <gmd:phone>
		    <gmd:CI_Telephone>
				  <gmd:voice>
				    <gco:CharacterString>Unavailable</gco:CharacterString>
				  </gmd:voice>
				  <gmd:facsimile>
				    <gco:CharacterString>508-289-2009</gco:CharacterString>
				  </gmd:facsimile>
				</gmd:CI_Telephone>
		  </gmd:phone>
		  <gmd:address>
		    <gmd:CI_Address>
				  <gmd:deliveryPoint>
				    <gco:CharacterString>WHOI MS#36</gco:CharacterString>
				  </gmd:deliveryPoint>
				  <gmd:city>
				    <gco:CharacterString>Woods Hole</gco:CharacterString>
				  </gmd:city>
				  <gmd:administrativeArea>
				    <gco:CharacterString>MA</gco:CharacterString>
				  </gmd:administrativeArea>
				  <gmd:postalCode>
				    <gco:CharacterString>02543</gco:CharacterString>
				  </gmd:postalCode>
				  <gmd:country>
				    <gco:CharacterString>USA</gco:CharacterString>
				  </gmd:country>
				  <gmd:electronicMailAddress>
				    <gco:CharacterString>info@bco-dmo.org</gco:CharacterString>
				  </gmd:electronicMailAddress>
		    </gmd:CI_Address>
		  </gmd:address>
      <gmd:onlineResource>
          <gmd:CI_OnlineResource>
            <gmd:linkage>
              <gmd:URL>http://www.bco-dmo.org</gmd:URL>
            </gmd:linkage>
          </gmd:CI_OnlineResource>
        </gmd:onlineResource>
		  <gmd:hoursOfService>
        <gco:CharacterString>Monday - Friday 8:00am - 5:00pm</gco:CharacterString>
      </gmd:hoursOfService>
		  <gmd:contactInstructions>
		    <gco:CharacterString>For questions regarding this resource, please contact BCO-DMO via the email address provided.</gco:CharacterString>
		  </gmd:contactInstructions>
		</gmd:CI_Contact>
  </gmd:contactInfo>
  <gmd:role>
    <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact"  codeSpace="007">pointOfContact</gmd:CI_RoleCode>
  </gmd:role>
</gmd:CI_ResponsibleParty>
  </gmd:contact>
  <gmd:dateStamp>
    <gco:Date>2025-12-29</gco:Date>
  </gmd:dateStamp>
  <gmd:metadataStandardName>
    <gco:CharacterString>ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data</gco:CharacterString>
  </gmd:metadataStandardName>
  <gmd:metadataStandardVersion>
    <gco:CharacterString>ISO 19115-2:2009(E)</gco:CharacterString>
  </gmd:metadataStandardVersion>
  <gmd:referenceSystemInfo xlink:href="https://data.noaa.gov/docucomp/895cc120-95ed-11e0-aa80-0800200c9a66" xlink:title="WGS 84 / World Mercator"/>
  <gmd:identificationInfo>
    <gmd:MD_DataIdentification>
      <gmd:citation>
        <gmd:CI_Citation>
          <gmd:title>
            <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset/990830.rdf" xlink:actuate="onRequest">Morphological data of Littorina obtusata populations from reciprocal transplant experiments in the Gulf of Maine conducted 20 years apart</gmx:Anchor>
          </gmd:title>
          <gmd:date>
            <gmd:CI_Date>
              <gmd:date>
                <gco:Date>2025-12-29</gco:Date>
              </gmd:date>
              <gmd:dateType>
                <gmd:CI_DateTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="publication" codeSpace="ISOTC211/19115">publication</gmd:CI_DateTypeCode>
              </gmd:dateType>
            </gmd:CI_Date>
          </gmd:date>
          <gmd:date>
            <gmd:CI_Date>
              <gmd:date>
                <gco:Date>2025-12-29</gco:Date>
              </gmd:date>
              <gmd:dateType>
                <gmd:CI_DateTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="revision" codeSpace="ISOTC211/19115">revision</gmd:CI_DateTypeCode>
              </gmd:dateType>
            </gmd:CI_Date>
          </gmd:date>
          <gmd:edition>
            <gco:CharacterString/>
          </gmd:edition>
          <gmd:identifier>
            <gmd:MD_Identifier>
              <gmd:authority>
                <gmd:CI_Citation>
                  <gmd:title>
                    <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/affiliation/191.rdf" xlink:actuate="onRequest">Woods Hole Oceanographic Institution (WHOI BCO-DMO)</gmx:Anchor>
                  </gmd:title>
                  <gmd:date>
                    <gmd:CI_Date>
                      <gmd:date>
                        <gco:Date>2026-01-13</gco:Date>
                      </gmd:date>
                      <gmd:dateType>
                        <gmd:CI_DateTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="publication" codeSpace="002">publication</gmd:CI_DateTypeCode>
                      </gmd:dateType>
                    </gmd:CI_Date>
                  </gmd:date>
                                  </gmd:CI_Citation>
              </gmd:authority>
              <gmd:code>
                <gmx:Anchor xlink:href="https://doi.org/10.26008/1912/bco-dmo.990830.1" xlink:title="DOI" xlink:actuate="onRequest">https://doi.org/10.26008/1912/bco-dmo.990830.1</gmx:Anchor>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmd:identifier>
          <gmd:citedResponsibleParty>
           <gmd:CI_ResponsibleParty>
              <gmd:individualName>
                <gmx:Anchor xlink:href="http://orcid.org/0000-0003-1260-0145" xlink:title="ORCID" xlink:actuate="onRequest">Geoffrey C. Trussell</gmx:Anchor>
              </gmd:individualName>
              <gmd:organisationName>
                <gmx:Anchor xlink:href="https://ror.org/04t5xt781" xlink:title="ROR ID" xlink:actuate="onRequest">Northeastern University</gmx:Anchor>
              </gmd:organisationName>
              <gmd:positionName>
               <gco:CharacterString></gco:CharacterString>
              </gmd:positionName>
              <gmd:role>
                <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="principalInvestigator" codeSpace="008">principalInvestigator</gmd:CI_RoleCode>
              </gmd:role>
            </gmd:CI_ResponsibleParty>
          </gmd:citedResponsibleParty>
          <gmd:citedResponsibleParty>
            <gmd:CI_ResponsibleParty>
  <gmd:organisationName>
    <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/affiliation/191.rdf" xlink:actuate="onRequest">Biological and Chemical Oceanography Data Management Office (BCO-DMO)</gmx:Anchor>
  </gmd:organisationName>
  <gmd:contactInfo>
    <gmd:CI_Contact>
		  <gmd:phone>
		    <gmd:CI_Telephone>
				  <gmd:voice>
				    <gco:CharacterString>Unavailable</gco:CharacterString>
				  </gmd:voice>
				  <gmd:facsimile>
				    <gco:CharacterString>508-289-2009</gco:CharacterString>
				  </gmd:facsimile>
				</gmd:CI_Telephone>
		  </gmd:phone>
		  <gmd:address>
		    <gmd:CI_Address>
				  <gmd:deliveryPoint>
				    <gco:CharacterString>WHOI MS#36</gco:CharacterString>
				  </gmd:deliveryPoint>
				  <gmd:city>
				    <gco:CharacterString>Woods Hole</gco:CharacterString>
				  </gmd:city>
				  <gmd:administrativeArea>
				    <gco:CharacterString>MA</gco:CharacterString>
				  </gmd:administrativeArea>
				  <gmd:postalCode>
				    <gco:CharacterString>02543</gco:CharacterString>
				  </gmd:postalCode>
				  <gmd:country>
				    <gco:CharacterString>USA</gco:CharacterString>
				  </gmd:country>
				  <gmd:electronicMailAddress>
				    <gco:CharacterString>info@bco-dmo.org</gco:CharacterString>
				  </gmd:electronicMailAddress>
		    </gmd:CI_Address>
		  </gmd:address>
      <gmd:onlineResource>
          <gmd:CI_OnlineResource>
            <gmd:linkage>
              <gmd:URL>http://www.bco-dmo.org</gmd:URL>
            </gmd:linkage>
          </gmd:CI_OnlineResource>
        </gmd:onlineResource>
		  <gmd:hoursOfService>
        <gco:CharacterString>Monday - Friday 8:00am - 5:00pm</gco:CharacterString>
      </gmd:hoursOfService>
		  <gmd:contactInstructions>
		    <gco:CharacterString>For questions regarding this resource, please contact BCO-DMO via the email address provided.</gco:CharacterString>
		  </gmd:contactInstructions>
		</gmd:CI_Contact>
  </gmd:contactInfo>
  <gmd:role>
    <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="publisher" >publisher</gmd:CI_RoleCode>
  </gmd:role>
</gmd:CI_ResponsibleParty>
          </gmd:citedResponsibleParty>
          <gmd:otherCitationDetails>
            <gco:CharacterString>Cite this dataset as: Trussell, G. C., Corbett, J. J. (2026) Morphological data of Littorina obtusata populations from reciprocal transplant experiments in the Gulf of Maine conducted 20 years apart. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-12-29 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.990830.1 [access date]</gco:CharacterString>
          </gmd:otherCitationDetails>
          </gmd:CI_Citation>
      </gmd:citation>
      <gmd:abstract>
        <gco:CharacterString>Morphological data from reciprocal transplant Dataset Description: &amp;lt;p&amp;gt;This dataset is part of a broader study conducted in the Gulf of Maine to investigate&amp;amp;nbsp;phenotypic plasticity of prey species in response to predator invasion and warming oceans:&amp;lt;/p&amp;gt;

&amp;lt;ol&amp;gt;
&amp;lt;li&amp;gt;Green crab surveys plus historical crab density data (dataset 990378)&amp;amp;nbsp;&amp;lt;/li&amp;gt;
&amp;lt;li&amp;gt;Green crab density from field studies at rocky intertidal sites from April 2019 to December 2021&amp;amp;nbsp;(dataset 911365)&amp;amp;nbsp;&amp;lt;/li&amp;gt;
&amp;lt;li&amp;gt;Latitudinal (clinal) variation in &amp;lt;em&amp;gt;Littorina obtusata&amp;lt;/em&amp;gt; shell thickness and tissue mass (dataset 990839)&amp;lt;/li&amp;gt;
&amp;lt;li&amp;gt;Field experiment outplanting&amp;amp;nbsp;&amp;lt;em&amp;gt;Littorina obtusata&amp;amp;nbsp;&amp;lt;/em&amp;gt;with predators (green crabs) to examine local and regional geographic variation in inducible defenses&amp;amp;nbsp;conducted from April to August 2021 (dataset&amp;amp;nbsp;911221)&amp;lt;/li&amp;gt;
&amp;lt;li&amp;gt;Morphological data from reciprocal transplant experiment in the field &amp;lt;strong&amp;gt;(this dataset&amp;lt;strong&amp;gt;)&amp;lt;/strong&amp;gt;&amp;lt;/strong&amp;gt;&amp;lt;/li&amp;gt;
&amp;lt;/ol&amp;gt;

&amp;lt;p&amp;gt;&amp;lt;strong&amp;gt;&amp;lt;strong&amp;gt;&amp;lt;/strong&amp;gt;&amp;lt;/strong&amp;gt;See Related Datasets section below for links and additional details.&amp;lt;/p&amp;gt; Methods and Sampling: &amp;lt;p&amp;gt;To examine how shell thickness and its plasticity have changed after 20 years (1998-2018), we repeated a reciprocal transplant experiment in 2018 that had previously been conducted in 1998 (Trussell and Smith, 2000). To allow a robust comparison of the two experiments, we carefully replicated all aspects of the 1998 experiment including using the same experimental chambers that were deployed into the field 20 years earlier. In early May 2018, we collected juvenile &amp;lt;em&amp;gt;Littorina&amp;amp;nbsp;obtusata &amp;lt;/em&amp;gt;(5-6 mm in shell length) from a northern&amp;amp;nbsp;and a southern site in the Gulf of Maine. The northern site was near Quoddy Head in Lubec, Maine (44.82, -66.97) and the southern site was Lobster Cove in Manchester, Massachusetts (42.56, -70.77). All snails were individually tagged with a color-coded dot of permanent ink that was then sealed with cyanoacrylate glue. We measured initial shell length and shell thickness with digital calipers (± 0.01 mm) and shell mass and tissue mass (± 0.001 g) were estimated using a non-destructive weighing technique (Palmer, 1982).&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;After completing initial measurements, we transported snails from both populations to the northern or southern site in mid-May. At each site, we placed six snails (hereafter, response snails) from a single population and approximately 60 grams of brown algae (&amp;lt;em&amp;gt;Ascophyllum nodosum&amp;lt;/em&amp;gt;) as food into 24 separate, replicate cylindrical containers (5-cm height x 10-cm diameter) that had mesh windows (mesh size = 3mm) to allow water flow. Hence, at each site 12 replicate containers housed snails from either the northern or southern population and 6 replicates for each population exposed snails to either the presence (Crab) or absence (No Crab) of predation risk. To create these risk treatments, each container stocked with response snails was secured beneath a similar container that was perforated on all sides and housed either (a) a mature male green crab (Crab) and 30 conspecific snails (hereafter, stimulus snails) or (b) just 30 stimulus snails (No Crab) to serve as a control. Each pair of stimulus-response containers was placed inside a large, replicate cylindrical chamber (11-cm height x 28-cm diameter) that had mesh windows (mesh size = 3mm) to permit water flow. These large chambers were anchored haphazardly in the mid-intertidal zone (~1.5 m MLW). Ocean temperature was monitored at 5-minute intervals during the experiment with dataloggers (Tidbits, model UTBI-001, Onset Computer Corp.) that were placed inside three replicate chambers at each site. Every 14 days we replaced stimulus snails in both the Crab and No Crab containers. For appropriate replicates, we also confirmed that crabs were alive; any dead crabs were replaced immediately. Overall, we had to replace 7 crabs at the northern site and 7 crabs at the southern site. At day 45, we replaced the &amp;lt;em&amp;gt;Ascophyllum&amp;lt;/em&amp;gt; that served as food for response snails in all replicates. After 90 days in the field, all response snails were returned to the Northeastern University Marine Science Center (Nahant, Massachusetts) for measurement of final snail shell length, shell thickness, and tissue mass.&amp;lt;/p&amp;gt;</gco:CharacterString>
      </gmd:abstract>
      <gmd:credit>
        <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/award/816469.rdf" xlink:title="OCE-2017626" xlink:actuate="onRequest">Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2017626 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2017626</gmx:Anchor>
      </gmd:credit>
        <gmd:status>
        <gmd:MD_ProgressCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ProgressCode" codeListValue="completed">completed</gmd:MD_ProgressCode>
      </gmd:status>
      <gmd:pointOfContact>
        <gmd:CI_ResponsibleParty>
          <gmd:individualName>
            <gmx:Anchor xlink:href="http://orcid.org/0000-0003-1260-0145" xlink:title="ORCID" xlink:actuate="onRequest">Geoffrey C. Trussell</gmx:Anchor>
          </gmd:individualName>
          <gmd:organisationName>
            <gmx:Anchor xlink:href="https://ror.org/04t5xt781" xlink:title="ROR ID" xlink:actuate="onRequest">Northeastern University</gmx:Anchor>
          </gmd:organisationName>
          <gmd:contactInfo>
            <gmd:CI_Contact>
            <gmd:phone>
                <gmd:CI_Telephone>
                  <gmd:voice>
                    <gco:CharacterString>781-581-7370 (ext. 300)</gco:CharacterString>
                  </gmd:voice>
                </gmd:CI_Telephone>
              </gmd:phone>
            <gmd:address>
                <gmd:CI_Address>
                                  <gmd:deliveryPoint>
                    <gco:CharacterString>Marine Science Center 430 Nahant Road</gco:CharacterString>
                  </gmd:deliveryPoint>
                                  <gmd:city>
                    <gco:CharacterString>Nahant</gco:CharacterString>
                  </gmd:city>                  <gmd:administrativeArea>
                    <gco:CharacterString>MA</gco:CharacterString>
                  </gmd:administrativeArea>                  <gmd:postalCode>
                    <gco:CharacterString>01908</gco:CharacterString>
                  </gmd:postalCode>                  <gmd:country>
                    <gco:CharacterString>USA</gco:CharacterString>
                  </gmd:country>                  <gmd:electronicMailAddress>
                    <gco:CharacterString>g.trussell@northeastern.edu</gco:CharacterString>
                  </gmd:electronicMailAddress>
                </gmd:CI_Address>
              </gmd:address>
            </gmd:CI_Contact>
          </gmd:contactInfo>
          <gmd:role>
            <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact" codeSpace="007">pointOfContact</gmd:CI_RoleCode>
          </gmd:role>
        </gmd:CI_ResponsibleParty>
      </gmd:pointOfContact>
            <gmd:resourceMaintenance>
        <gmd:MD_MaintenanceInformation>
          <gmd:maintenanceAndUpdateFrequency>
            <gmd:MD_MaintenanceFrequencyCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_MaintenanceFrequencyCode" codeListValue="asNeeded" codeSpace="009">asNeeded</gmd:MD_MaintenanceFrequencyCode>
          </gmd:maintenanceAndUpdateFrequency>
          <gmd:maintenanceNote>
            <gco:CharacterString>Dataset Version: 1</gco:CharacterString>
          </gmd:maintenanceNote>
          </gmd:MD_MaintenanceInformation>
      </gmd:resourceMaintenance>
      <gmd:resourceFormat>
        <gmd:MD_Format>
          <gmd:name>
             <gco:CharacterString>Unknown</gco:CharacterString>
          </gmd:name>
          <gmd:version gco:nilReason="unknown"/>
          </gmd:MD_Format>
      </gmd:resourceFormat>
            <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990875.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/1062.rdf" xlink:actuate="onRequest">Year</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990876.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/1741.rdf" xlink:actuate="onRequest">Population</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990877.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/1124.rdf" xlink:actuate="onRequest">Location</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990878.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/489066.rdf" xlink:actuate="onRequest">Risk_Treatment</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990879.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/953.rdf" xlink:actuate="onRequest">Replicate</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990880.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/990862.rdf" xlink:actuate="onRequest">Initial_Shell_Thickness</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990881.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/1097.rdf" xlink:actuate="onRequest">Initial_Shell_Length</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990882.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/886.rdf" xlink:actuate="onRequest">Initial_Shell_Mass</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990883.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/886.rdf" xlink:actuate="onRequest">Initial_Tissue_Mass</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990884.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/990862.rdf" xlink:actuate="onRequest">Final_Shell_Thickness</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990885.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/1097.rdf" xlink:actuate="onRequest">Final_Shell_Length</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990886.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/886.rdf" xlink:actuate="onRequest">Final_Shell_Mass</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-parameter/990887.rdf" xlink:title="http://lod.bco-dmo.org/id/parameter/886.rdf" xlink:actuate="onRequest">Final_Tissue_Mass</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-instrument/990837.rdf" xlink:title="http://lod.bco-dmo.org/id/instrument/820156.rdf" xlink:actuate="onRequest">digital calipers</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-instrument/991339.rdf" xlink:title="http://lod.bco-dmo.org/id/instrument/553780.rdf" xlink:actuate="onRequest">Tidbits, model UTBI-001, Onset Computer Corp</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset-instrument/990838.rdf" xlink:title="http://lod.bco-dmo.org/id/instrument/962318.rdf" xlink:actuate="onRequest">cylindrical containers with mesh windows</gmx:Anchor>
        </gmd:keyword>
        <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="theme" codeSpace="005">theme</gmd:MD_KeywordTypeCode>
          </gmd:type>
          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>None, User defined</gco:CharacterString>
              </gmd:title>
              <gmd:date gco:nilReason="unknown"/>
            </gmd:CI_Citation>
          </gmd:thesaurusName>
        </gmd:MD_Keywords>
      </gmd:descriptiveKeywords>
            <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/parameter/1062.rdf" xlink:title="Parameter" xlink:actuate="onRequest">year</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/parameter/1741.rdf" xlink:title="Parameter" xlink:actuate="onRequest">sample description</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/parameter/1124.rdf" xlink:title="Parameter" xlink:actuate="onRequest">site</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/parameter/489066.rdf" xlink:title="Parameter" xlink:actuate="onRequest">treatment</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/parameter/953.rdf" xlink:title="Parameter" xlink:actuate="onRequest">replicate</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/parameter/990862.rdf" xlink:title="Parameter" xlink:actuate="onRequest">shell thickness</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/parameter/1097.rdf" xlink:title="Parameter" xlink:actuate="onRequest">length</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/parameter/886.rdf" xlink:title="Parameter" xlink:actuate="onRequest">mass</gmx:Anchor>
        </gmd:keyword>
        <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="featureType">featureType</gmd:MD_KeywordTypeCode>
          </gmd:type>
          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>BCO-DMO Standard Parameters</gco:CharacterString>
              </gmd:title>
              <gmd:date gco:nilReason="unknown"/>
            </gmd:CI_Citation>
          </gmd:thesaurusName>
        </gmd:MD_Keywords>
      </gmd:descriptiveKeywords>
            <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/instrument/820156.rdf" xlink:title="Instrument" xlink:actuate="onRequest">calipers</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/instrument/553780.rdf" xlink:title="Instrument" xlink:actuate="onRequest">Onset HOBO TidbiT v2 (UTBI-001) temperature logger</gmx:Anchor>
        </gmd:keyword>
                <gmd:keyword>
          <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/instrument/962318.rdf" xlink:title="Instrument" xlink:actuate="onRequest">Test chamber</gmx:Anchor>
        </gmd:keyword>
        <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="instrument">instrument</gmd:MD_KeywordTypeCode>
          </gmd:type>
          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>BCO-DMO Standard Instruments</gco:CharacterString>
              </gmd:title>
              <gmd:date gco:nilReason="unknown"/>
            </gmd:CI_Citation>
          </gmd:thesaurusName>
        </gmd:MD_Keywords>
      </gmd:descriptiveKeywords>
      <gmd:resourceConstraints>
        <gmd:MD_LegalConstraints>
          <gmd:accessConstraints>
            <gmd:MD_RestrictionCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_RestrictionCode" codeListValue="otherRestrictions" codeSpace="008">otherRestrictions</gmd:MD_RestrictionCode>
          </gmd:accessConstraints>
          <gmd:useConstraints>
            <gmd:MD_RestrictionCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_RestrictionCode" codeListValue="otherRestrictions" codeSpace="008">otherRestrictions</gmd:MD_RestrictionCode>
          </gmd:useConstraints>
          <gmd:otherConstraints>
            <gco:CharacterString>Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.</gco:CharacterString>
          </gmd:otherConstraints>
        </gmd:MD_LegalConstraints>
              </gmd:resourceConstraints>
      <gmd:aggregationInfo>
        <gmd:MD_AggregateInformation>
          <gmd:aggregateDataSetName>
              <gmd:CI_Citation>
                <gmd:title>
                  <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/project/816470.rdf" xlink:title="Project" xlink:actuate="onRequest">Local adaptation and the evolution of plasticity under predator invasion and warming seas: consequences for individuals, populations and communities</gmx:Anchor>
                </gmd:title>
                <gmd:date gco:nilReason="inapplicable"/>
                <gmd:citedResponsibleParty>
                  <gmd:CI_ResponsibleParty>
                    <gmd:contactInfo>
                      <gmd:CI_Contact>
                        <gmd:onlineResource>
                          <gmd:CI_OnlineResource>
                          <gmd:linkage>
                            <gmd:URL>https://osprey.bco-dmo.org/project/816470</gmd:URL>
                          </gmd:linkage>
                          <gmd:name>
                            <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/project/816470.rdf" xlink:title="Project Name" xlink:actuate="onRequest">Local adaptation and the evolution of plasticity under predator invasion and warming seas: consequences for individuals, populations and communities</gmx:Anchor>
                          </gmd:name>
                          <gmd:description>
                            <gco:CharacterString>&lt;p&gt;&lt;em&gt;NSF Award Abstract:&lt;/em&gt;&lt;br /&gt;
Over the past two decades, the Gulf of Maine has experienced unprecedented warming that, among other things, has further enabled the invasive green crab to expand its range in rocky shore habitats. The adverse ecological impacts of this invasive predator have been documented worldwide. This study examines how geographic variation in the capacity of two common prey species to respond to the combination of this predator and warming ocean temperatures can shape prey feeding and performance and impact community structure and dynamics. Hence, this research enhances understanding of the evolution of phenotypes, their plasticity, and the nature of adaptation and its role in eco-evolutionary dynamics. More broadly, it informs understanding of how organisms and marine communities may respond to future environmental change. In addition, this project makes contributions to the STEM pipeline by providing middle and high school, undergraduate, and graduate students with cross-disciplinary training in evolutionary and community ecology. In collaboration with an institutional outreach program, the investigator is also developing web-based multimedia projects and teacher resource materials based on this research.&lt;/p&gt;
&lt;p&gt;A central principle in ecology is that species residing in the middle of food chains must balance the benefits of eating with the risk of being eaten by their predators. Solving this foraging-predation risk trade-off often involves plasticity in prey traits with consequences for the evolution of adaptation and species interactions that drive community-level processes. Hence, the foraging-predation risk trade-off provides a powerful conceptual framework that links evolutionary and community ecology. Yet at the same time, other environmental stressors like temperature can shape this trade-off, adding complexity that makes it difficult to predict the capacity of organisms to adapt to environmental change and the consequences for communities. The investigator is conducting this study in rocky shore habitats of the Gulf of Maine (GOM) which have long been influenced by strong latitudinal temperature gradients and non-native species invasions. The overarching hypothesis is that predation risk and temperature are factors shaping geographic variation in plasticity and adaptation, with consequences for individuals, populations, and communities. First, the investigator is conducting field experiments to document geographic variation in the trait plasticity of two common prey species in the green crab's diet. Second, he is using reciprocal transplant experiments to examine trait plasticity in response to risk and water temperature, generating data to compare with similar experiments conducted in the late 90s prior to recent ocean warming and expansion in range of green crabs. Third, he is conducting a laboratory common garden experiment to evaluate the effects of risk and water temperature on trait plasticity. Finally, he is using reciprocal transplant experiments in the field to understand the interactive effects of risk and water temperature on prey foraging rates and the abundance of a species that plays an important role in intertidal community structure and dynamics.&lt;/p&gt;
&lt;p&gt;This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.&lt;/p&gt;</gco:CharacterString>
                          </gmd:description>
                          <gmd:function>
                            <gmd:CI_OnLineFunctionCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information"/>
                          </gmd:function>
                      </gmd:CI_OnlineResource>
                    </gmd:onlineResource>
                  </gmd:CI_Contact>
                </gmd:contactInfo>
                <gmd:role/>
              </gmd:CI_ResponsibleParty>
            </gmd:citedResponsibleParty>
          </gmd:CI_Citation>
        </gmd:aggregateDataSetName>
          <gmd:aggregateDataSetIdentifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/project/816470.rdf" xlink:title="Project Acronym" xlink:actuate="onRequest">evolution of plasticity</gmx:Anchor>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmd:aggregateDataSetIdentifier>
          <gmd:associationType>
            <gmd:DS_AssociationTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#DS_AssociationTypeCode" codeListValue="largerWorkCitation">largerWorkCitation</gmd:DS_AssociationTypeCode>
          </gmd:associationType>
          <gmd:initiativeType>
            <gmd:DS_InitiativeTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#DS_InitiativeTypeCode" codeListValue="project">project</gmd:DS_InitiativeTypeCode>
          </gmd:initiativeType>
        </gmd:MD_AggregateInformation>
      </gmd:aggregationInfo>
      <gmd:language>
        <gco:CharacterString>eng; USA</gco:CharacterString>
      </gmd:language>
      <gmd:topicCategory>
        <gmd:MD_TopicCategoryCode>biota</gmd:MD_TopicCategoryCode>
      </gmd:topicCategory>
       <gmd:topicCategory>
        <gmd:MD_TopicCategoryCode>oceans</gmd:MD_TopicCategoryCode>
      </gmd:topicCategory>
       <gmd:extent>
        <gmd:EX_Extent id="boundingExtent"><gmd:geographicElement>
            <gmd:EX_GeographicBoundingBox id="boundingGeographicBoundingBox">
              <gmd:westBoundLongitude>
                <gco:Decimal>-70.77</gco:Decimal>
              </gmd:westBoundLongitude>
              <gmd:eastBoundLongitude>
                <gco:Decimal>-66.97</gco:Decimal>
              </gmd:eastBoundLongitude>
              <gmd:southBoundLatitude>
                <gco:Decimal>42.56</gco:Decimal>
              </gmd:southBoundLatitude>
              <gmd:northBoundLatitude>
                <gco:Decimal>44.82</gco:Decimal>
              </gmd:northBoundLatitude>
            </gmd:EX_GeographicBoundingBox>
          </gmd:geographicElement>
        <gmd:temporalElement>
            <gmd:EX_TemporalExtent>
              <gmd:extent>
                <gml:TimePeriod gml:id="boundingTemporalExtent">
                  <gml:beginPosition>1998-01-01</gml:beginPosition>
                  <gml:endPosition>2018-12-31</gml:endPosition>
                </gml:TimePeriod>
              </gmd:extent>
            </gmd:EX_TemporalExtent>
          </gmd:temporalElement>
          </gmd:EX_Extent>
      </gmd:extent>
      </gmd:MD_DataIdentification>
  </gmd:identificationInfo>
  <gmd:contentInfo>
    <gmd:MD_FeatureCatalogueDescription>
      <gmd:includedWithDataset>
        <gco:Boolean>0</gco:Boolean>
      </gmd:includedWithDataset>
      <gmd:featureCatalogueCitation>
        <gmd:CI_Citation>
          <gmd:title>
            <gco:CharacterString>BCO-DMO catalogue of parameters from Morphological data of Littorina obtusata populations from reciprocal transplant experiments in the Gulf of Maine conducted 20 years apart</gco:CharacterString>
          </gmd:title>
          <gmd:date gco:nilReason="unknown"/>
          <gmd:citedResponsibleParty>
            <gmd:CI_ResponsibleParty>
  <gmd:organisationName>
    <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/affiliation/191.rdf" xlink:actuate="onRequest">Biological and Chemical Oceanography Data Management Office (BCO-DMO)</gmx:Anchor>
  </gmd:organisationName>
  <gmd:contactInfo>
    <gmd:CI_Contact>
		  <gmd:phone>
		    <gmd:CI_Telephone>
				  <gmd:voice>
				    <gco:CharacterString>Unavailable</gco:CharacterString>
				  </gmd:voice>
				  <gmd:facsimile>
				    <gco:CharacterString>508-289-2009</gco:CharacterString>
				  </gmd:facsimile>
				</gmd:CI_Telephone>
		  </gmd:phone>
		  <gmd:address>
		    <gmd:CI_Address>
				  <gmd:deliveryPoint>
				    <gco:CharacterString>WHOI MS#36</gco:CharacterString>
				  </gmd:deliveryPoint>
				  <gmd:city>
				    <gco:CharacterString>Woods Hole</gco:CharacterString>
				  </gmd:city>
				  <gmd:administrativeArea>
				    <gco:CharacterString>MA</gco:CharacterString>
				  </gmd:administrativeArea>
				  <gmd:postalCode>
				    <gco:CharacterString>02543</gco:CharacterString>
				  </gmd:postalCode>
				  <gmd:country>
				    <gco:CharacterString>USA</gco:CharacterString>
				  </gmd:country>
				  <gmd:electronicMailAddress>
				    <gco:CharacterString>info@bco-dmo.org</gco:CharacterString>
				  </gmd:electronicMailAddress>
		    </gmd:CI_Address>
		  </gmd:address>
      <gmd:onlineResource>
          <gmd:CI_OnlineResource>
            <gmd:linkage>
              <gmd:URL>http://www.bco-dmo.org</gmd:URL>
            </gmd:linkage>
          </gmd:CI_OnlineResource>
        </gmd:onlineResource>
		  <gmd:hoursOfService>
        <gco:CharacterString>Monday - Friday 8:00am - 5:00pm</gco:CharacterString>
      </gmd:hoursOfService>
		  <gmd:contactInstructions>
		    <gco:CharacterString>For questions regarding this resource, please contact BCO-DMO via the email address provided.</gco:CharacterString>
		  </gmd:contactInstructions>
		</gmd:CI_Contact>
  </gmd:contactInfo>
  <gmd:role>
    <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact"  codeSpace="007">pointOfContact</gmd:CI_RoleCode>
  </gmd:role>
</gmd:CI_ResponsibleParty>
          </gmd:citedResponsibleParty>
          <gmd:otherCitationDetails>
            <gco:CharacterString>
            http://lod.bco-dmo.org/id/dataset-parameter/990875.rdf
	Name: Year
	Units: unitless
	Description: &lt;p&gt;Year in which the experiment was conducted&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990876.rdf
	Name: Population
	Units: unitless
	Description: &lt;p&gt;Source population (North, South) of the snails used in the reciprocal transplant experiment&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990877.rdf
	Name: Location
	Units: unitless
	Description: &lt;p&gt;Denotes the site (North, South) at which snails were raised as part of the reciprocal transplant experiment&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990878.rdf
	Name: Risk_Treatment
	Units: unitless
	Description: &lt;p&gt;Treatment exposure; whether snails were raised in the presence (Crab) or absence (No Crab) of green crab risk cues during the reciprocal transplant experiment&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990879.rdf
	Name: Replicate
	Units: unitless
	Description: &lt;p&gt;Denotes the specific unit that snails were raised in as part of the reciprocal transplant experiment&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990880.rdf
	Name: Initial_Shell_Thickness
	Units: millimeters (mm)
	Description: &lt;p&gt;Shell thickness (mm) of snails at the beginning of reciprocal transplant experiment&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990881.rdf
	Name: Initial_Shell_Length
	Units: millimeters (mm)
	Description: &lt;p&gt;Initial shell length (mm) of snails at the beginning of reciprocal transplant experiment&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990882.rdf
	Name: Initial_Shell_Mass
	Units: milligrams (mg)
	Description: &lt;p&gt;Initial shell mass (mg) of snails at the beginning of reciprocal transplant experiment&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990883.rdf
	Name: Initial_Tissue_Mass
	Units: milligrams (mg)
	Description: &lt;p&gt;Initial tissue mass (mg) of snails at the beginning of reciprocal transplant experiment&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990884.rdf
	Name: Final_Shell_Thickness
	Units: millimeters (mm)
	Description: &lt;p&gt;Shell thickness (mm) of snails at the end of reciprocal transplant experiment&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990885.rdf
	Name: Final_Shell_Length
	Units: millimeters (mm)
	Description: &lt;p&gt;Final shell length (mm) of snails at the beginning of reciprocal transplant experiment&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990886.rdf
	Name: Final_Shell_Mass
	Units: milligrams (mg)
	Description: &lt;p&gt;Final shell mass (mg) of snails at the beginning of reciprocal transplant experiment&lt;/p&gt; 
http://lod.bco-dmo.org/id/dataset-parameter/990887.rdf
	Name: Final_Tissue_Mass
	Units: milligrams (mg)
	Description: &lt;p&gt;Final tissue mass (mg) of snails at the beginning of reciprocal transplant experiment&lt;/p&gt; 
</gco:CharacterString>
          </gmd:otherCitationDetails>
        </gmd:CI_Citation>
      </gmd:featureCatalogueCitation>
      <gmd:featureCatalogueCitation>
        <gmd:CI_Citation>
          <gmd:title>
            <gco:CharacterString>GB/NERC/BODC &gt; British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom</gco:CharacterString>
          </gmd:title>
          <gmd:date gco:nilReason="unknown"/>
          <gmd:citedResponsibleParty xlink:href="https://data.noaa.gov/docucomp/3D8FE2C9DA324D40939C8D007587E011" xlink:title="GB/NERC/BODC &gt; British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom"/>
          <gmd:otherCitationDetails>
            <gco:CharacterString>
            </gco:CharacterString>
          </gmd:otherCitationDetails>
        </gmd:CI_Citation>
      </gmd:featureCatalogueCitation>
    </gmd:MD_FeatureCatalogueDescription>
  </gmd:contentInfo>
  <gmd:distributionInfo>
    <gmd:MD_Distribution>
      <gmd:distributor>
        <gmd:MD_Distributor>
          <gmd:distributorContact>
            <gmd:CI_ResponsibleParty>
  <gmd:organisationName>
    <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/affiliation/191.rdf" xlink:actuate="onRequest">Biological and Chemical Oceanography Data Management Office (BCO-DMO)</gmx:Anchor>
  </gmd:organisationName>
  <gmd:contactInfo>
    <gmd:CI_Contact>
		  <gmd:phone>
		    <gmd:CI_Telephone>
				  <gmd:voice>
				    <gco:CharacterString>Unavailable</gco:CharacterString>
				  </gmd:voice>
				  <gmd:facsimile>
				    <gco:CharacterString>508-289-2009</gco:CharacterString>
				  </gmd:facsimile>
				</gmd:CI_Telephone>
		  </gmd:phone>
		  <gmd:address>
		    <gmd:CI_Address>
				  <gmd:deliveryPoint>
				    <gco:CharacterString>WHOI MS#36</gco:CharacterString>
				  </gmd:deliveryPoint>
				  <gmd:city>
				    <gco:CharacterString>Woods Hole</gco:CharacterString>
				  </gmd:city>
				  <gmd:administrativeArea>
				    <gco:CharacterString>MA</gco:CharacterString>
				  </gmd:administrativeArea>
				  <gmd:postalCode>
				    <gco:CharacterString>02543</gco:CharacterString>
				  </gmd:postalCode>
				  <gmd:country>
				    <gco:CharacterString>USA</gco:CharacterString>
				  </gmd:country>
				  <gmd:electronicMailAddress>
				    <gco:CharacterString>info@bco-dmo.org</gco:CharacterString>
				  </gmd:electronicMailAddress>
		    </gmd:CI_Address>
		  </gmd:address>
      <gmd:onlineResource>
          <gmd:CI_OnlineResource>
            <gmd:linkage>
              <gmd:URL>http://www.bco-dmo.org</gmd:URL>
            </gmd:linkage>
          </gmd:CI_OnlineResource>
        </gmd:onlineResource>
		  <gmd:hoursOfService>
        <gco:CharacterString>Monday - Friday 8:00am - 5:00pm</gco:CharacterString>
      </gmd:hoursOfService>
		  <gmd:contactInstructions>
		    <gco:CharacterString>For questions regarding this resource, please contact BCO-DMO via the email address provided.</gco:CharacterString>
		  </gmd:contactInstructions>
		</gmd:CI_Contact>
  </gmd:contactInfo>
  <gmd:role>
    <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact"  codeSpace="007">pointOfContact</gmd:CI_RoleCode>
  </gmd:role>
</gmd:CI_ResponsibleParty>
          </gmd:distributorContact>
        </gmd:MD_Distributor>
      </gmd:distributor>
      <gmd:transferOptions>
        <gmd:MD_DigitalTransferOptions>
        <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>https://doi.org/10.26008/1912/bco-dmo.990830.1</gmd:URL>
              </gmd:linkage>
              <gmd:function>
                <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode>
              </gmd:function>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
        <gmd:offLine>
            <gmd:MD_Medium>
              <gmd:name>
                 <gmd:MD_MediumNameCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_MediumNameCode" codeListValue="onLine">onLine</gmd:MD_MediumNameCode>
              </gmd:name>
            </gmd:MD_Medium>
          </gmd:offLine>
        </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
    </gmd:MD_Distribution>
  </gmd:distributionInfo>
  <gmd:dataQualityInfo>
    <gmd:DQ_DataQuality>
      <gmd:scope>
        <gmd:DQ_Scope>
          <gmd:level>
            <gmd:MD_ScopeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_ScopeCode" codeListValue="dataset">dataset</gmd:MD_ScopeCode>
          </gmd:level>
        </gmd:DQ_Scope>
      </gmd:scope>
            <gmd:lineage>
        <gmd:LI_Lineage>
          <gmd:processStep xlink:title="Methods and Sampling">
            <gmd:LI_ProcessStep>
              <gmd:description>
                <gco:CharacterString>&amp;lt;p&amp;gt;To examine how shell thickness and its plasticity have changed after 20 years (1998-2018), we repeated a reciprocal transplant experiment in 2018 that had previously been conducted in 1998 (Trussell and Smith, 2000). To allow a robust comparison of the two experiments, we carefully replicated all aspects of the 1998 experiment including using the same experimental chambers that were deployed into the field 20 years earlier. In early May 2018, we collected juvenile &amp;lt;em&amp;gt;Littorina&amp;amp;nbsp;obtusata &amp;lt;/em&amp;gt;(5-6 mm in shell length) from a northern&amp;amp;nbsp;and a southern site in the Gulf of Maine. The northern site was near Quoddy Head in Lubec, Maine (44.82, -66.97) and the southern site was Lobster Cove in Manchester, Massachusetts (42.56, -70.77). All snails were individually tagged with a color-coded dot of permanent ink that was then sealed with cyanoacrylate glue. We measured initial shell length and shell thickness with digital calipers (± 0.01 mm) and shell mass and tissue mass (± 0.001 g) were estimated using a non-destructive weighing technique (Palmer, 1982).&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;After completing initial measurements, we transported snails from both populations to the northern or southern site in mid-May. At each site, we placed six snails (hereafter, response snails) from a single population and approximately 60 grams of brown algae (&amp;lt;em&amp;gt;Ascophyllum nodosum&amp;lt;/em&amp;gt;) as food into 24 separate, replicate cylindrical containers (5-cm height x 10-cm diameter) that had mesh windows (mesh size = 3mm) to allow water flow. Hence, at each site 12 replicate containers housed snails from either the northern or southern population and 6 replicates for each population exposed snails to either the presence (Crab) or absence (No Crab) of predation risk. To create these risk treatments, each container stocked with response snails was secured beneath a similar container that was perforated on all sides and housed either (a) a mature male green crab (Crab) and 30 conspecific snails (hereafter, stimulus snails) or (b) just 30 stimulus snails (No Crab) to serve as a control. Each pair of stimulus-response containers was placed inside a large, replicate cylindrical chamber (11-cm height x 28-cm diameter) that had mesh windows (mesh size = 3mm) to permit water flow. These large chambers were anchored haphazardly in the mid-intertidal zone (~1.5 m MLW). Ocean temperature was monitored at 5-minute intervals during the experiment with dataloggers (Tidbits, model UTBI-001, Onset Computer Corp.) that were placed inside three replicate chambers at each site. Every 14 days we replaced stimulus snails in both the Crab and No Crab containers. For appropriate replicates, we also confirmed that crabs were alive; any dead crabs were replaced immediately. Overall, we had to replace 7 crabs at the northern site and 7 crabs at the southern site. At day 45, we replaced the &amp;lt;em&amp;gt;Ascophyllum&amp;lt;/em&amp;gt; that served as food for response snails in all replicates. After 90 days in the field, all response snails were returned to the Northeastern University Marine Science Center (Nahant, Massachusetts) for measurement of final snail shell length, shell thickness, and tissue mass.&amp;lt;/p&amp;gt;</gco:CharacterString>
              </gmd:description>
              <gmd:source>
                <gmd:LI_Source>
                  <gmd:sourceCitation>
                    <gmd:CI_Citation>
                      <gmd:title>
                        <gco:CharacterString>Specified by the Principal Investigator(s)</gco:CharacterString>
                      </gmd:title>
                      <gmd:date gco:nilReason="unknown"/>
                    </gmd:CI_Citation>
                  </gmd:sourceCitation>
                </gmd:LI_Source>
              </gmd:source>
            </gmd:LI_ProcessStep>
          </gmd:processStep>
          <gmd:processStep xlink:title="BCO-DMO Data Processing Description">
              <gmd:LI_ProcessStep>
                <gmd:description>
                  <gco:CharacterString>- Imported original file named &amp;quot;2.Trussell.Corbett.Updated.ReciprocalTransplantExperiment.csv&amp;quot; into the BCO-DMO system.
- Renamed fields/columns to comply with BCO-DMO naming conventions.
- Saved the final file as &amp;quot;990830_v1_morphological_data_reciprocal_transplant.csv&amp;quot;</gco:CharacterString>
                </gmd:description>
                <gmd:source>
                  <gmd:LI_Source>
                    <gmd:sourceCitation>
                      <gmd:CI_Citation>
                        <gmd:title>
                          <gco:CharacterString>Specified by BCO-DMO Data Managers</gco:CharacterString>
                        </gmd:title>
                        <gmd:date gco:nilReason="unknown"/>
                      </gmd:CI_Citation>
                    </gmd:sourceCitation>
                  </gmd:LI_Source>
                </gmd:source>
              </gmd:LI_ProcessStep>
            </gmd:processStep>
          </gmd:LI_Lineage>
      </gmd:lineage>
   </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
  <gmd:metadataMaintenance>
    <gmd:MD_MaintenanceInformation>
      <gmd:maintenanceAndUpdateFrequency>
        <gmd:MD_MaintenanceFrequencyCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_MaintenanceFrequencyCode" codeListValue="asNeeded" codeSpace="009">asNeeded</gmd:MD_MaintenanceFrequencyCode>
      </gmd:maintenanceAndUpdateFrequency>
      <gmd:maintenanceNote>
        <gco:CharacterString>7.x-1.1</gco:CharacterString>
      </gmd:maintenanceNote>
      <gmd:contact>
        <gmd:CI_ResponsibleParty>
  <gmd:organisationName>
    <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/affiliation/191.rdf" xlink:actuate="onRequest">Biological and Chemical Oceanography Data Management Office (BCO-DMO)</gmx:Anchor>
  </gmd:organisationName>
  <gmd:contactInfo>
    <gmd:CI_Contact>
		  <gmd:phone>
		    <gmd:CI_Telephone>
				  <gmd:voice>
				    <gco:CharacterString>Unavailable</gco:CharacterString>
				  </gmd:voice>
				  <gmd:facsimile>
				    <gco:CharacterString>508-289-2009</gco:CharacterString>
				  </gmd:facsimile>
				</gmd:CI_Telephone>
		  </gmd:phone>
		  <gmd:address>
		    <gmd:CI_Address>
				  <gmd:deliveryPoint>
				    <gco:CharacterString>WHOI MS#36</gco:CharacterString>
				  </gmd:deliveryPoint>
				  <gmd:city>
				    <gco:CharacterString>Woods Hole</gco:CharacterString>
				  </gmd:city>
				  <gmd:administrativeArea>
				    <gco:CharacterString>MA</gco:CharacterString>
				  </gmd:administrativeArea>
				  <gmd:postalCode>
				    <gco:CharacterString>02543</gco:CharacterString>
				  </gmd:postalCode>
				  <gmd:country>
				    <gco:CharacterString>USA</gco:CharacterString>
				  </gmd:country>
				  <gmd:electronicMailAddress>
				    <gco:CharacterString>info@bco-dmo.org</gco:CharacterString>
				  </gmd:electronicMailAddress>
		    </gmd:CI_Address>
		  </gmd:address>
      <gmd:onlineResource>
          <gmd:CI_OnlineResource>
            <gmd:linkage>
              <gmd:URL>http://www.bco-dmo.org</gmd:URL>
            </gmd:linkage>
          </gmd:CI_OnlineResource>
        </gmd:onlineResource>
		  <gmd:hoursOfService>
        <gco:CharacterString>Monday - Friday 8:00am - 5:00pm</gco:CharacterString>
      </gmd:hoursOfService>
		  <gmd:contactInstructions>
		    <gco:CharacterString>For questions regarding this resource, please contact BCO-DMO via the email address provided.</gco:CharacterString>
		  </gmd:contactInstructions>
		</gmd:CI_Contact>
  </gmd:contactInfo>
  <gmd:role>
    <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact"  codeSpace="007">pointOfContact</gmd:CI_RoleCode>
  </gmd:role>
</gmd:CI_ResponsibleParty>
      </gmd:contact>
    </gmd:MD_MaintenanceInformation>
  </gmd:metadataMaintenance>
  <gmi:acquisitionInformation>
    <gmi:MI_AcquisitionInformation>
    <gmi:instrument>
        <gmi:MI_Instrument>
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/instrument/820156.rdf" xlink:title="calipers" xlink:actuate="onRequest">digital calipers</gmx:Anchor>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>digital calipers</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>PI Supplied Instrument Name: digital calipers PI Supplied Instrument Description:We measured initial shell length and shell thickness with digital calipers. Instrument Name: calipers Instrument Short Name:   Instrument Description: A caliper (or &quot;pair of calipers&quot;) is a device used to measure the distance between two opposite sides of an object. Many types of calipers permit reading out a measurement on a ruled scale, a dial, or a digital display.</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument>
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/instrument/553780.rdf" xlink:title="Onset HOBO TidbiT v2 (UTBI-001) temperature logger" xlink:actuate="onRequest">Tidbits, model UTBI-001, Onset Computer Corp</gmx:Anchor>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>Tidbits, model UTBI-001, Onset Computer Corp</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>PI Supplied Instrument Name: Tidbits, model UTBI-001, Onset Computer Corp PI Supplied Instrument Description:Ocean temperature was monitored at 5-minute intervals during the experiment with dataloggers (Tidbits, model UTBI-001, Onset Computer Corp.) Instrument Name: Onset HOBO TidbiT v2 (UTBI-001) temperature logger Instrument Short Name:HOBO TidBit v2   Instrument Description: A temperature logger that measures temperatures over a wide temperature range. It is designed for outdoor and underwater environments and is waterproof to 300 m. A solar radiation shield is required to obtain accurate air temperature measurements in sunlight (RS1 or M-RSA Solar Radiation Shield). With an operational temperature range between -20 degrees Celsius and +70 degrees Celsius, the TidbiT v2 has an accuracy of +/-0.21 and a resolution of 0.02 degrees Celsius. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/134/</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument>
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/instrument/962318.rdf" xlink:title="Test chamber" xlink:actuate="onRequest">cylindrical containers with mesh windows</gmx:Anchor>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>cylindrical containers with mesh windows</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>PI Supplied Instrument Name: cylindrical containers with mesh windows PI Supplied Instrument Description:The experimental containers were cylindrical (5-cm height x 10-cm diameter) and had mesh windows (mesh size = 3mm) to allow water flow. Instrument Name: Test chamber Instrument Short Name:Test chamber   Instrument Description: A test chamber is a controlled environment where specific conditions (temperature, humidity, light, etc.) are maintained for testing and research purposes.

Also called climatic chamber, environmental chamber, environmental room, or environmental enclosure</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      </gmi:MI_AcquisitionInformation>
  </gmi:acquisitionInformation>
</gmi:MI_Metadata>
