http://lod.bco-dmo.org/id/dataset/1000489 eng; USA utf8 dataset Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact 2026-06-05 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Lottia gigantea growth data from field experiments of experimentally manipulated competitor densities on the Northern and Central California coast from Feb to Dec 2023 2026-06-09 publication 2026-06-09 revision BCO-DMO Linked Data URI 2026-06-09 creation http://lod.bco-dmo.org/id/dataset/1000489 Rachael Bay University of California-Davis principalInvestigator Eric Sanford University of California-Davis principalInvestigator Samuel Walkes University of California-Davis principalInvestigator Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. publisher Cite this dataset as: Walkes, S., Bay, R., Sanford, E. (2026) Lottia gigantea growth data from field experiments of experimentally manipulated competitor densities on the Northern and Central California coast from Feb to Dec 2023. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-06-09 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/1000489 [access date] Lottia field experiment 2023 Dataset Description: Methods and Sampling: &lt;p&gt;To test the hypothesis that the effects of both intra- and interspecific competition on performance vary geographically in a range-shifting species, we experimentally manipulated the densities of &lt;em&gt;L. gigantea &lt;/em&gt;and &lt;em&gt;L. scabra&lt;/em&gt; at the five study sites across the range. The sites included 3 range core sites (Vandenberg, Soberanes Point, and Hopkins Marine Station) and 2 expanding edge sites (Bodega Marine Reserve and Kruse Ranch).&lt;/p&gt; &lt;p&gt;To manipulate densities, we used hand tools to clear ~650 cm&lt;sup&gt;2&lt;/sup&gt; sections of rocky intertidal substrate of all invertebrates and algae. To ensure habitat suitability, we selected gently sloping areas in the mid-intertidal zone with relatively high &lt;em&gt;L. gigantea &lt;/em&gt;abundance. Once cleared, we enclosed these areas with 650 cm&lt;sup&gt;2&lt;/sup&gt; octagonal cages with walls made of stainless-steel mesh with 3 mm wide openings (McMaster Carr). Cages were covered with a plastic vexar mesh lid with 1.27 cm wide openings to prevent most small grazers from entering the cages. We bolted cages to the rock to secure them to the substratum and then sealed the edges to the rock with marine epoxy (Z-spar splash zone compound).&lt;/p&gt; &lt;p&gt;Cages were deployed in a complete block design, with four cages in each block randomly assigned one of four treatments in spring 2023. Each treatment included a focal &lt;em&gt;L. gigantea&lt;/em&gt; collected from that site&lt;em&gt; &lt;/em&gt;(initial shell length = 25-40 mm)&lt;em&gt; &lt;/em&gt;used to quantify growth rate. The control treatment included only the focal owl limpet; the “intraspecific competition” treatment included the focal owl limpet along with a second, slightly larger owl limpet (initial shell length = 30-40 mm); the “interspecific competition” treatment included the focal owl limpet and nine &lt;em&gt;L. scabra&lt;/em&gt; (initial shell length 18-22 mm); and the “combined” treatment included the focal owl limpet, a larger owl limpet, and nine &lt;em&gt;L. scabra&lt;/em&gt;. The densities in each treatment reflected the upper end of natural abundances that occur in the range core (Walkes, &lt;em&gt;unpublished data&lt;/em&gt;). Each block was replicated 8 times, for a total of 32 experimental cages at each site distributed over ~200m of shoreline. In each cage, we tagged the single focal &lt;em&gt;L. gigantea&lt;/em&gt; using a small (6 mm) Floy tag attached to surface of the shell using a small dab of marine epoxy (Z-spar splash zone epoxy compound). To assess performance as a response to each treatment, we recorded absolute growth rate based on change in shell length through time for the focal &lt;em&gt;L. gigantea&lt;/em&gt; in each cage. Shell length was measured using calipers along the posterior to anterior axis of the shell at the beginning and end of the experiment to calculate growth rate. Cages were checked approximately every three months at each site to remove algae and other fouling organisms, and to replace any dead focal limpets (N = 7) and competing limpets. The experiment ended after 10 months in November-December 2023.&lt;/p&gt; Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2023297 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2023297 onGoing Rachael Bay University of California-Davis 530-754-1439 Dept of Evolution and Ecology University of California Davis CA 95616 US rbay@ucdavis.edu pointOfContact Eric Sanford University of California-Davis P.O. Box 247 2099 Westshore Road Bodega Bay CA 94923 USA edsanford@ucdavis.edu pointOfContact Samuel Walkes University of California-Davis sawalkes@ucdavis.edu pointOfContact asNeeded Dataset Version: 1 Unknown Block Treatment Tag Site date_initial Length_initial Length_final date_final dt AGR Latitude Longitude calipers Floy tag theme None, User defined site treatment tagid date begin length date end days rate_measurements latitude longitude featureType BCO-DMO Standard Parameters calipers labeling tag instrument BCO-DMO Standard Instruments otherRestrictions otherRestrictions 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. Evolutionary and ecological dynamics of a contemporary climate-driven range expansion https://osprey.bco-dmo.org/project/867543 Evolutionary and ecological dynamics of a contemporary climate-driven range expansion <p><em>NSF abstract:</em><br /> Anthropogenic climate change is shifting the distributions of species across the globe. Such contemporary shifts in species’ ranges may have cascading effects on entire ecosystems. This project disentangles the mechanisms underlying climate-driven species range shifts in marine systems using the intertidal owl limpet as a case study. During the recent marine heatwaves off the Pacific coast of North America, populations at the northern range limit in northern California have expanded, with ongoing reproduction even after termination of the heatwave events. This is therefore an ideal system to explore the dynamics of natural selection that occur as species occupy new regions. Broadly, this project deepens understanding of how range shifts occur in marine systems and furthers the ability to predict future species distributions in response to climate change. The project provides research experiences for high school and undergraduate students from historically underrepresented groups by engaging with existing, demonstrably-effective programs. The investigators host leadership and skill-building workshops for senior female graduate students and engage the public in partnership with the California Academy of Sciences, Bodega Marine Lab, and San Francisco Exploratorium. Finally, the project provides training for a postdoctoral scholar and two graduate students.</p> <p>Although phenomenological studies suggest that climate-associated range shifts are common in marine systems, to date, mechanistic studies of the climate-organism interactions that alter geographic distributions have largely focused on terrestrial systems. However, dispersal dynamics greatly differ in many marine systems, as currents may frequently transport planktonic larvae into new environmental regimes. This project integrates detailed demographic observations of the recent range expansion of the intertidal owl limpet, Lottia gigantea, with ecological, phenotypic, and genomic measurements of divergence across its range. Specifically, the work 1) documents phenotypic divergence in larval and juvenile traits across the zone of range expansion, 2) uses whole genome sequencing to estimate gene flow across the entire range, 3) identifies genomic patterns of selection across the zone of range expansion and through time, and 4) identifies drivers of variation in performance over latitudinal and microgeographic scales. The ability to monitor this range shift in real time, along with the suitability of this system for tracking individuals across multiple years, allows the investigators to examine the impact of selection in novel range-edge conditions at the phenotypic and genomic levels, and scale from individuals to species-level responses to ongoing environmental change.</p> <p>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.</p> LottiaRangeExp largerWorkCitation project eng; USA biota oceans -123.363 -120.6144 34.5878 38.5973 2023-02-20 2023-12-13 Coastal California intertidal 0 BCO-DMO catalogue of parameters from Lottia gigantea growth data from field experiments of experimentally manipulated competitor densities on the Northern and Central California coast from Feb to Dec 2023 Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact http://lod.bco-dmo.org/id/dataset-parameter/1000719.rdf Name: Block Units: unitless Description: <p>Cages were placed in a block design, with four cages adjacent to each other at each site. Each block contained one of the four treatments: (control, intraspecific, interspecific, or combined), though several limpets (n = 7) died over the course of the experiment. Note that the identifier is not unique in the spreadsheet</p> http://lod.bco-dmo.org/id/dataset-parameter/1000720.rdf Name: Treatment Units: unitless Description: <p>The experimental treatment the limpet received. Either control, intraspecific, interspecific, or combined</p> http://lod.bco-dmo.org/id/dataset-parameter/1000721.rdf Name: Tag Units: unitless Description: <p>Tag number for each focal limpet. Blank values represent lost tags</p> http://lod.bco-dmo.org/id/dataset-parameter/1000722.rdf Name: Site Units: unitless Description: <p>The site at which the growth data were recorded; Vandenberg, Soberanes, Hopkins, Bodega Marine Reserve, or Kruse Ranch</p> http://lod.bco-dmo.org/id/dataset-parameter/1000723.rdf Name: date_initial Units: unitless Description: <p>Date of initial size measurement</p> http://lod.bco-dmo.org/id/dataset-parameter/1000724.rdf Name: Length_initial Units: mm Description: <p>Initial shell length measured using handheld calipers along the longest posterior to anterior axis of the shell</p> http://lod.bco-dmo.org/id/dataset-parameter/1000725.rdf Name: Length_final Units: mm Description: <p>Final shell length measured using handheld calipers along the longest posterior to anterior axis of the shell</p> http://lod.bco-dmo.org/id/dataset-parameter/1000726.rdf Name: date_final Units: unitless Description: <p>Date of final size measurement</p> http://lod.bco-dmo.org/id/dataset-parameter/1000727.rdf Name: dt Units: Days Description: <p>Days between initial and final shell length measurements</p> http://lod.bco-dmo.org/id/dataset-parameter/1000728.rdf Name: AGR Units: mm/day Description: <p>Absolute growth rate. Measured as the change in shell length through time ((Length_f – Length_i)/dt)</p> http://lod.bco-dmo.org/id/dataset-parameter/1000729.rdf Name: Latitude Units: Decimal degrees Description: <p>Latitude of study site, positive is North</p> http://lod.bco-dmo.org/id/dataset-parameter/1000731.rdf Name: Longitude Units: Decimal degrees Description: <p>Longitude of study site, negative is West</p> GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact https://osprey.bco-dmo.org/dataset/1000489/data/download download onLine dataset &lt;p&gt;To test the hypothesis that the effects of both intra- and interspecific competition on performance vary geographically in a range-shifting species, we experimentally manipulated the densities of &lt;em&gt;L. gigantea &lt;/em&gt;and &lt;em&gt;L. scabra&lt;/em&gt; at the five study sites across the range. The sites included 3 range core sites (Vandenberg, Soberanes Point, and Hopkins Marine Station) and 2 expanding edge sites (Bodega Marine Reserve and Kruse Ranch).&lt;/p&gt; &lt;p&gt;To manipulate densities, we used hand tools to clear ~650 cm&lt;sup&gt;2&lt;/sup&gt; sections of rocky intertidal substrate of all invertebrates and algae. To ensure habitat suitability, we selected gently sloping areas in the mid-intertidal zone with relatively high &lt;em&gt;L. gigantea &lt;/em&gt;abundance. Once cleared, we enclosed these areas with 650 cm&lt;sup&gt;2&lt;/sup&gt; octagonal cages with walls made of stainless-steel mesh with 3 mm wide openings (McMaster Carr). Cages were covered with a plastic vexar mesh lid with 1.27 cm wide openings to prevent most small grazers from entering the cages. We bolted cages to the rock to secure them to the substratum and then sealed the edges to the rock with marine epoxy (Z-spar splash zone compound).&lt;/p&gt; &lt;p&gt;Cages were deployed in a complete block design, with four cages in each block randomly assigned one of four treatments in spring 2023. Each treatment included a focal &lt;em&gt;L. gigantea&lt;/em&gt; collected from that site&lt;em&gt; &lt;/em&gt;(initial shell length = 25-40 mm)&lt;em&gt; &lt;/em&gt;used to quantify growth rate. The control treatment included only the focal owl limpet; the “intraspecific competition” treatment included the focal owl limpet along with a second, slightly larger owl limpet (initial shell length = 30-40 mm); the “interspecific competition” treatment included the focal owl limpet and nine &lt;em&gt;L. scabra&lt;/em&gt; (initial shell length 18-22 mm); and the “combined” treatment included the focal owl limpet, a larger owl limpet, and nine &lt;em&gt;L. scabra&lt;/em&gt;. The densities in each treatment reflected the upper end of natural abundances that occur in the range core (Walkes, &lt;em&gt;unpublished data&lt;/em&gt;). Each block was replicated 8 times, for a total of 32 experimental cages at each site distributed over ~200m of shoreline. In each cage, we tagged the single focal &lt;em&gt;L. gigantea&lt;/em&gt; using a small (6 mm) Floy tag attached to surface of the shell using a small dab of marine epoxy (Z-spar splash zone epoxy compound). To assess performance as a response to each treatment, we recorded absolute growth rate based on change in shell length through time for the focal &lt;em&gt;L. gigantea&lt;/em&gt; in each cage. Shell length was measured using calipers along the posterior to anterior axis of the shell at the beginning and end of the experiment to calculate growth rate. Cages were checked approximately every three months at each site to remove algae and other fouling organisms, and to replace any dead focal limpets (N = 7) and competing limpets. The experiment ended after 10 months in November-December 2023.&lt;/p&gt; Specified by the Principal Investigator(s) &lt;p&gt;We recorded absolute growth rate (AGR) as the change in shell length (in mm) through time.&amp;nbsp;&lt;/p&gt; Specified by the Principal Investigator(s) - Loaded lottia_exp.csv as table &quot;lottia_exp&quot; in CSV format, treating empty string, &quot;nd&quot;, and &quot;na&quot; as missing values - Renamed columns to BCO-DMO conventions: date_i to date_initial, Length_i to Length_initial, Length_f to Length_final, date_f to date_final - Converted date_initial from M/D/YY format to ISO 8601 YYYY-MM-DD date type - Converted date_final from M/D/YY format to ISO 8601 YYYY-MM-DD date type - Output written to 1000489_v1_lottia_growth_experiment.csv Specified by BCO-DMO Data Managers asNeeded 7.x-1.1 Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact calipers calipers PI Supplied Instrument Name: calipers PI Supplied Instrument Description:Shell length was measured using calipers along the posterior to anterior axis of the shell at the beginning and end of the experiment to calculate growth rate. Instrument Name: calipers Instrument Short Name: Instrument Description: A caliper (or "pair of calipers") 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. Floy tag Floy tag PI Supplied Instrument Name: Floy tag PI Supplied Instrument Description:In each cage, we tagged the single focal L. gigantea using a small (6 mm) Floy tag attached to surface of the shell using a small dab of marine epoxy (Z-spar splash zone epoxy compound). Instrument Name: labeling tag Instrument Short Name: Instrument Description: Passive devices attached to captured organisms to specifically identify them when recaptured after release.