http://lod.bco-dmo.org/id/dataset/838077
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
2021-01-26
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Estimates of island-wide sea otter population density as surveyed with boats circumnavigating nine focal islands within the central and western Aleutian Islands (Alaska) from 1991-2015.
2021-01-26
publication
2021-01-26
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2021-02-23
publication
https://doi.org/10.26008/1912/bco-dmo.838077.1
Robert S. Steneck
University of Maine
principalInvestigator
James A. Estes
University of California-Santa Cruz
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: Estes, J. A., Steneck, R. S., Rasher, D. B. (2021) Estimates of island-wide sea otter population density as surveyed with boats circumnavigating nine focal islands within the central and western Aleutian Islands (Alaska) from 1991-2015. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2021-01-26 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.838077.1 [access date]
Dataset Description: <p>These data were published in Table S1 in Rasher et al., 2020 (see Related Publications section below).&nbsp;</p> Methods and Sampling: <p>At each island, visual counts of sea otters were made from a 4 m open boat as it circumnavigated the island perimeter at a speed of 18 to 25 km per hour, just outside of any existing kelp canopy and/or close enough to shore (50-150 m) to be able to easily see an animal swimming or resting on the surface.&nbsp; The perimeter of the island was divided into sectors, and these designations were utilized every year a survey was conducted.&nbsp; Survey teams consisted of a primary observer, data recorder, and boat operator (who also acted as a secondary observer).&nbsp; As the boat moved parallel to shore and around any offshore islets, observers visually scanned for sea otters both inshore and offshore of the boat trajectory and, in the case of larger sea otter groups or difficult-to-access locations, the boat was paused and binoculars were used to scan the area and obtain accurate counts.&nbsp; Whenever sea otters were observed and counted, we noted their geo-location, group size, reproductive status (single animals or females with pups), whether the animals were less than or greater than 20 m from the nearest point of land or emergent substrate, and whether each animal was within or outside a surface canopy of kelp.&nbsp; Here, we report only island-wide abundance estimates for independent (non-pup) individuals, as dependent pup counts were variable due to annual differences in the timing of reproduction.&nbsp; Because surveys varied from year to year in terms of the percentage of the island’s perimeter surveyed (ranging from ~50% to 100%), we standardized counts to linear density (independent sea otters per km of linear coastline surveyed).</p>
<p>NOTE: Surveys were conducted opportunistically, and thus intermittently, from 1991 to 2015 at each island. As such, some islands were surveyed more frequently than others.</p>
Funding provided by NSF Arctic Sciences (NSF ARC) Award Number: PLR-1316141 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1316141
completed
Robert S. Steneck
University of Maine
(207) 563-8315
Darling Marine Center 193 Clarks Cove Road
Walpole
ME
04573
USA
steneck@maine.edu
pointOfContact
James A. Estes
University of California-Santa Cruz
(831) 459-2820
Coastal Biology Building 130 McAllister Way
Santa Cruz
CA
95060
United States
jestes@ucsc.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Year
Island
Latitude
Longitude
Density
theme
None, User defined
year
site
latitude
longitude
density
featureType
BCO-DMO Standard Parameters
Binoculars Handheld
instrument
BCO-DMO Standard Instruments
PS1409
service
Deployment Activity
Aleutian Archipelago
place
Locations
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.
Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES): Ocean Acidification (formerly CRI-OA)
https://www.nsf.gov/funding/pgm_summ.jsp?pims_id=503477
Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES): Ocean Acidification (formerly CRI-OA)
NSF Climate Research Investment (CRI) activities that were initiated in 2010 are now included under Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES). SEES is a portfolio of activities that highlights NSF's unique role in helping society address the challenge(s) of achieving sustainability. Detailed information about the SEES program is available from NSF (https://www.nsf.gov/funding/pgm_summ.jsp?pims_id=504707).
In recognition of the need for basic research concerning the nature, extent and impact of ocean acidification on oceanic environments in the past, present and future, the goal of the SEES: OA program is to understand (a) the chemistry and physical chemistry of ocean acidification; (b) how ocean acidification interacts with processes at the organismal level; and (c) how the earth system history informs our understanding of the effects of ocean acidification on the present day and future ocean.
Solicitations issued under this program:
NSF 10-530, FY 2010-FY2011
NSF 12-500, FY 2012
NSF 12-600, FY 2013
NSF 13-586, FY 2014
NSF 13-586 was the final solicitation that will be released for this program.
PI Meetings:
1st U.S. Ocean Acidification PI Meeting(March 22-24, 2011, Woods Hole, MA)
2nd U.S. Ocean Acidification PI Meeting(Sept. 18-20, 2013, Washington, DC)
3rd U.S. Ocean Acidification PI Meeting (June 9-11, 2015, Woods Hole, MA – Tentative)
NSF media releases for the Ocean Acidification Program:
Press Release 10-186 NSF Awards Grants to Study Effects of Ocean Acidification
Discovery Blue Mussels "Hang On" Along Rocky Shores: For How Long?
Discovery nsf.gov - National Science Foundation (NSF) Discoveries - Trouble in Paradise: Ocean Acidification This Way Comes - US National Science Foundation (NSF)
Press Release 12-179 nsf.gov - National Science Foundation (NSF) News - Ocean Acidification: Finding New Answers Through National Science Foundation Research Grants - US National Science Foundation (NSF)
Press Release 13-102 World Oceans Month Brings Mixed News for Oysters
Press Release 13-108 nsf.gov - National Science Foundation (NSF) News - Natural Underwater Springs Show How Coral Reefs Respond to Ocean Acidification - US National Science Foundation (NSF)
Press Release 13-148 Ocean acidification: Making new discoveries through National Science Foundation research grants
Press Release 13-148 - Video nsf.gov - News - Video - NSF Ocean Sciences Division Director David Conover answers questions about ocean acidification. - US National Science Foundation (NSF)
Press Release 14-010 nsf.gov - National Science Foundation (NSF) News - Palau's coral reefs surprisingly resistant to ocean acidification - US National Science Foundation (NSF)
Press Release 14-116 nsf.gov - National Science Foundation (NSF) News - Ocean Acidification: NSF awards $11.4 million in new grants to study effects on marine ecosystems - US National Science Foundation (NSF)
SEES-OA
largerWorkCitation
program
Ocean Acidification: Century Scale Impacts to Ecosystem Structure and Function of Aleutian Kelp Forests
https://osprey.bco-dmo.org/project/526660
Ocean Acidification: Century Scale Impacts to Ecosystem Structure and Function of Aleutian Kelp Forests
<p><em>Extracted from the NSF award abstract:</em></p>
<p>Marine calcifying organisms are most at risk to rapid ocean acidification (OA) in cold-water ecosystems. The investigators propose to determine if a globally unique and widespread calcareous alga in Alaska's Aleutian archipelago, <em>Clathromorphum nereostratum</em>, is threatened with extinction due to the combined effects of OA and food web alterations. <em>C. nereostratum</em> is a slow growing coralline alga that can live to at least 2000 years. It accretes massive 'bioherms' that dominate the regions' rocky substrate both under kelp forests and deforested sea urchin barrens. It develops growth bands (similar to tree rings) in its calcareous skeleton, which effectively record its annual calcification rate over centuries. Pilot data suggest the skeletal density of <em>C. nereostratum</em> began to decline precipitously in the 1990's in some parts of the Aleutian archipelago. The investigators now propose to use high-resolution microscopy and microCT imaging to examine how the growth and skeletal density of <em>C. nereostratum</em> has changed in the past 300 years (i.e., since the industrial revolution) across the western Aleutians. They will compare their records of algal skeletal densities and their variation through time with reconstructions of past climate to infer causes of change. In addition, the investigators will examine whether the alga's defense against grazing by sea urchins is compromised by ongoing ocean acidification. The investigators will survey the extent of <em>C. nereostratum</em> bioerosion occurring at 10 sites spanning the western Aleutians, both inside and outside of kelp forests. At each site they will compare these patterns to observed and monitored ecosystem trophic structure and recent <em>C. nereostratum</em> calcification rates. Field observations will be combined with laboratory experiments to determine if it is a decline in the alga's skeletal density (due to recent OA and warming), an increase in grazing intensity (due to recent trophic-level dysfunction), or their interactive effects that are likely responsible for bioerosion patterns inside vs. outside of forests. By sampling <em>C. nereostratum</em> inside and outside of forests, they will determine if kelp forests locally increase pH via photosynthesis, and thus buffer the effects of OA on coralline calcification. The combination of field observations with laboratory controlled experiments, manipulating CO2 and temperature, will help elucidate drivers of calcification and project how these species interactions will likely change in the near future. The project will provide the first in situ example of how ongoing ocean acidification is affecting the physiology of long-lived, carbonate producing organisms in the subarctic North Pacific. It will also be one of the first studies to document whether OA, ocean warming, and food web changes to ecological processes are interacting in complex ways to reshape the outcome of species interactions in nature.</p>
OA Kelp Forest Function
largerWorkCitation
project
eng; USA
biota
oceans
Aleutian Archipelago
172.90952
-176.174031
51.518
52.8991
1991-01-01
2015-12-31
0
BCO-DMO catalogue of parameters from Estimates of island-wide sea otter population density as surveyed with boats circumnavigating nine focal islands within the central and western Aleutian Islands (Alaska) from 1991-2015.
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/838974.rdf
Name: Year
Units: Year
Description: <p>Year of survey</p>
http://lod.bco-dmo.org/id/dataset-parameter/838975.rdf
Name: Island
Units: Unitless
Description: <p>Name of island surveyed</p>
http://lod.bco-dmo.org/id/dataset-parameter/838976.rdf
Name: Latitude
Units: Decimal degrees
Description: <p>Latitude of island surveyed</p>
http://lod.bco-dmo.org/id/dataset-parameter/838977.rdf
Name: Longitude
Units: Decimal degrees
Description: <p>Longitude of island surveyed</p>
http://lod.bco-dmo.org/id/dataset-parameter/838978.rdf
Name: Density
Units: Units
Description: <p>Number of individuals per linear km of coastline </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
7593
https://darchive.mblwhoilibrary.org/bitstream/1912/26730/1/dataset-838077_historical-sea-otter-density-island-survey__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.838077.1
download
onLine
dataset
<p>At each island, visual counts of sea otters were made from a 4 m open boat as it circumnavigated the island perimeter at a speed of 18 to 25 km per hour, just outside of any existing kelp canopy and/or close enough to shore (50-150 m) to be able to easily see an animal swimming or resting on the surface.&nbsp; The perimeter of the island was divided into sectors, and these designations were utilized every year a survey was conducted.&nbsp; Survey teams consisted of a primary observer, data recorder, and boat operator (who also acted as a secondary observer).&nbsp; As the boat moved parallel to shore and around any offshore islets, observers visually scanned for sea otters both inshore and offshore of the boat trajectory and, in the case of larger sea otter groups or difficult-to-access locations, the boat was paused and binoculars were used to scan the area and obtain accurate counts.&nbsp; Whenever sea otters were observed and counted, we noted their geo-location, group size, reproductive status (single animals or females with pups), whether the animals were less than or greater than 20 m from the nearest point of land or emergent substrate, and whether each animal was within or outside a surface canopy of kelp.&nbsp; Here, we report only island-wide abundance estimates for independent (non-pup) individuals, as dependent pup counts were variable due to annual differences in the timing of reproduction.&nbsp; Because surveys varied from year to year in terms of the percentage of the island’s perimeter surveyed (ranging from ~50% to 100%), we standardized counts to linear density (independent sea otters per km of linear coastline surveyed).</p>
<p>NOTE: Surveys were conducted opportunistically, and thus intermittently, from 1991 to 2015 at each island. As such, some islands were surveyed more frequently than others.</p>
Specified by the Principal Investigator(s)
<p>BCO-DMO processing:<br />
- Adjusted parameter names to comply with database requirements<br />
- Added a conventional header with dataset name, PIs, and version date<br />
- Converted longitude West values to degrees East&nbsp;</p>
Specified by the Principal Investigator(s)
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
PI Supplied Instrument Name: Instrument Name: Binoculars Handheld Instrument Short Name:Binoculars Instrument Description: Handheld binoculars, generally used for bird or mammal observations. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/91/
Cruise: PS1409
PS1409
R/V Point Sur
Community Standard Description
International Council for the Exploration of the Sea
R/V Point Sur
vessel
PS1409
Robert S. Steneck
University of Maine
R/V Point Sur
Community Standard Description
International Council for the Exploration of the Sea
R/V Point Sur
vessel