BCO-DMO ERDDAP
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Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv
attribute NC_GLOBAL acquisition_description String We conducted a controlled laboratory experiment to test whether the capacity\nof S. polyacanthus to consume C. nereostratum scales with its size. Conducted\nunder ambient light and continuous water flow (mean water temperature ~8.5\ndegrees C), this feeding experiment consisted of five sea urchin size classes\n(15-55 mm test diameter; binned in 10 mm size classes, n = 5/size class). Size\nclasses were evenly distributed among blocks (n = 5), with each block\nincluding a control alga (i.e., C. nereostratum caged alone) to account for\nalgal growth as well as loss due to factors other than herbivory (see\ncalculation below). Urchins were individually housed with a single C.\nnereostratum colony. We assessed the blotted wet mass of each C. nereostratum\nat the beginning of the assay, then again after 10 days. We calculated the\n(corrected) amount of C. nereostratum consumed in each assay using the\nequation [Ti x (Cf/Ci)] - Tf, where Ti and Tf is the initial and final mass\n(respectively) of an alga exposed to herbivory and Ci and Cf is the initial\nand final mass (respectively) of its paired control.\n \nAfter computing per capita grazing rate (\\\"amount.mg.consumed/day\\\") for each\nurchin, we also standardized each per capita grazing rate by the estimated\nbiomass (calculated via a known size-weight relationship) of the individual\nurchin (\\\"amount.mg.consumed/d/gram.urchin\\\").\n \nFinally, we quantified the maximum depth (mm) to which each urchin grazed C.\nnereostratum by examining each sample under a microscope and measuring the\ndepth of the most significant grazing scar using an ocular micrometer.
attribute NC_GLOBAL awards_0_award_nid String 526658
attribute NC_GLOBAL awards_0_award_number String PLR-1316141
attribute NC_GLOBAL awards_0_data_url String http://nsf.gov/awardsearch/showAward?AWD_ID=1316141 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Arctic Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF ARC
attribute NC_GLOBAL awards_0_funding_source_nid String 390
attribute NC_GLOBAL awards_0_program_manager String Henrietta N Edmonds
attribute NC_GLOBAL awards_0_program_manager_nid String 51517
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Estimates of per capita sea urchin grazing rates on Clathromorphum nereostratum \n   PI's: Steneck (Umaine), J. Estes (UCSC), D. Rasher (BLOS) \n   version: 2019-02-013
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3  19 Dec 2019
attribute NC_GLOBAL date_created String 2019-02-13T20:50:58Z
attribute NC_GLOBAL date_modified String 2019-02-25T20:37:51Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.755712.1
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/755712 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL keywords String amount, amount_grams_consumed, amount_mg_consumed, amount_mg_consumed_d_gram_urchin, amount_mg_consumed_day, bco, bco-dmo, biological, biomass, cca, cca_mass_final_grams, cca_mass_initial_grams, chemical, consumed, corrected, corrected_cca_mass_initial_grams, correction, correction_factor, data, dataset, day, depth, diameter, dmo, erddap, factor, final, gram, grams, grazed, initial, management, mass, max, max_depth_grazed_mm, oceanography, office, preliminary, replicate, treatment, urchin, urchin_biomass_grams, urchin_diameter_mm
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/755712/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/755712 (external link)
attribute NC_GLOBAL param_mapping String {'755712': {'max_depth_grazed_mm': 'master - depth'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/755712/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of Maine
attribute NC_GLOBAL people_0_affiliation_acronym String U Maine DMC
attribute NC_GLOBAL people_0_person_name String Robert  S. Steneck
attribute NC_GLOBAL people_0_person_nid String 526659
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String University of California-Santa Cruz
attribute NC_GLOBAL people_1_affiliation_acronym String UC Santa Cruz
attribute NC_GLOBAL people_1_person_name String James Estes
attribute NC_GLOBAL people_1_person_nid String 51389
attribute NC_GLOBAL people_1_role String Co-Principal Investigator
attribute NC_GLOBAL people_1_role_type String originator
attribute NC_GLOBAL people_2_affiliation String Bigelow Laboratory for Ocean Sciences
attribute NC_GLOBAL people_2_person_name String Douglas B. Rasher
attribute NC_GLOBAL people_2_person_nid String 480721
attribute NC_GLOBAL people_2_role String Co-Principal Investigator
attribute NC_GLOBAL people_2_role_type String originator
attribute NC_GLOBAL people_3_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_3_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_3_person_name String Nancy Copley
attribute NC_GLOBAL people_3_person_nid String 50396
attribute NC_GLOBAL people_3_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_3_role_type String related
attribute NC_GLOBAL project String OA Kelp Forest Function
attribute NC_GLOBAL projects_0_acronym String OA Kelp Forest Function
attribute NC_GLOBAL projects_0_description String Extracted from the NSF award abstract:\nMarine 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, Clathromorphum nereostratum, is threatened with extinction due to the combined effects of OA and food web alterations. C. nereostratum 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 C. nereostratum 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 C. nereostratum 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 C. nereostratum 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 C. nereostratum 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 C. nereostratum 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.
attribute NC_GLOBAL projects_0_end_date String 2016-08
attribute NC_GLOBAL projects_0_name String Ocean Acidification:  Century Scale Impacts to Ecosystem Structure and Function of Aleutian Kelp Forests
attribute NC_GLOBAL projects_0_project_nid String 526660
attribute NC_GLOBAL projects_0_start_date String 2013-09
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String Estimates of per capita sea urchin grazing rates on Clathromorphum nereostratum, evaluated as a function of sea urchin size. Assays were performed under ambient conditions in a controlled mesocosm setting, using the urchin Strongylocentrotus polyacanthus.
attribute NC_GLOBAL title String [Lab urchin grazing assay fx size] - Laboratory study of estimates of per capita sea urchin grazing rates on Clathromorphum nereostratum, evaluated as a function of sea urchin size (Ocean Acidification:  Century Scale Impacts to Ecosystem Structure and Function of Aleutian Kelp Forests)
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable treatment String
attribute treatment bcodmo_name String treatment
attribute treatment description String target size class of sea urchin
attribute treatment long_name String Treatment
attribute treatment units String millimeters
variable replicate byte
attribute replicate _FillValue byte 127
attribute replicate actual_range byte 1, 5
attribute replicate bcodmo_name String replicate
attribute replicate description String replicate individual urchin or alga
attribute replicate long_name String Replicate
attribute replicate units String unitless
variable urchin_diameter_mm byte
attribute urchin_diameter_mm _FillValue byte 127
attribute urchin_diameter_mm actual_range byte 15, 57
attribute urchin_diameter_mm bcodmo_name String diameter
attribute urchin_diameter_mm description String actual size (test diameter) of sea urchin
attribute urchin_diameter_mm long_name String Urchin Diameter Mm
attribute urchin_diameter_mm units String millimeters
variable urchin_biomass_grams float
attribute urchin_biomass_grams _FillValue float NaN
attribute urchin_biomass_grams actual_range float 1.3, 69.4
attribute urchin_biomass_grams bcodmo_name String biomass
attribute urchin_biomass_grams description String biomass of sea urchin; estimated using known length-weight relationship
attribute urchin_biomass_grams long_name String Urchin Biomass Grams
attribute urchin_biomass_grams units String grams
variable cca_mass_initial_grams float
attribute cca_mass_initial_grams _FillValue float NaN
attribute cca_mass_initial_grams actual_range float 4.269, 15.44
attribute cca_mass_initial_grams bcodmo_name String mass
attribute cca_mass_initial_grams description String initial mass of coralline alga
attribute cca_mass_initial_grams long_name String Cca Mass Initial Grams
attribute cca_mass_initial_grams units String grams
variable cca_mass_final_grams float
attribute cca_mass_final_grams _FillValue float NaN
attribute cca_mass_final_grams actual_range float 4.208, 13.887
attribute cca_mass_final_grams bcodmo_name String mass
attribute cca_mass_final_grams description String final mass of coralline alga
attribute cca_mass_final_grams long_name String Cca Mass Final Grams
attribute cca_mass_final_grams units String grams
variable correction_factor float
attribute correction_factor _FillValue float NaN
attribute correction_factor actual_range float 0.985, 0.997
attribute correction_factor bcodmo_name String unknown
attribute correction_factor description String correction factor; computed by dividing the final mass of the paired control alga by its initial mass (Cf/Ci)
attribute correction_factor long_name String Correction Factor
attribute correction_factor units String unitless
variable corrected_cca_mass_initial_grams float
attribute corrected_cca_mass_initial_grams _FillValue float NaN
attribute corrected_cca_mass_initial_grams actual_range float 4.222, 15.353
attribute corrected_cca_mass_initial_grams bcodmo_name String mass
attribute corrected_cca_mass_initial_grams description String cca_mass_initial_grams * correction_factor
attribute corrected_cca_mass_initial_grams long_name String Corrected Cca Mass Initial Grams
attribute corrected_cca_mass_initial_grams units String grams
variable amount_grams_consumed float
attribute amount_grams_consumed _FillValue float NaN
attribute amount_grams_consumed actual_range float -0.031, 1.466
attribute amount_grams_consumed bcodmo_name String mass
attribute amount_grams_consumed description String amount of coralline algae consumed: corrected_cca_mass_initial_grams minus cca_mass_final_grams
attribute amount_grams_consumed long_name String Amount Grams Consumed
attribute amount_grams_consumed units String grams
variable amount_mg_consumed float
attribute amount_mg_consumed _FillValue float NaN
attribute amount_mg_consumed actual_range float -31.072, 1465.543
attribute amount_mg_consumed bcodmo_name String mass
attribute amount_mg_consumed description String amount of coralline algae consumed
attribute amount_mg_consumed long_name String Amount Mg Consumed
attribute amount_mg_consumed units String millimeters
variable amount_mg_consumed_day float
attribute amount_mg_consumed_day _FillValue float NaN
attribute amount_mg_consumed_day actual_range float -3.046, 143.681
attribute amount_mg_consumed_day bcodmo_name String unknown
attribute amount_mg_consumed_day description String rate of algal consumption (per day)
attribute amount_mg_consumed_day long_name String Amount Mg Consumed Day
attribute amount_mg_consumed_day units String millimeters
variable amount_mg_consumed_d_gram_urchin float
attribute amount_mg_consumed_d_gram_urchin _FillValue float NaN
attribute amount_mg_consumed_d_gram_urchin actual_range float -1.965, 20.483
attribute amount_mg_consumed_d_gram_urchin bcodmo_name String unknown
attribute amount_mg_consumed_d_gram_urchin description String rate of algal consumption (per day): standardized by the biomass of the individual sea urchin
attribute amount_mg_consumed_d_gram_urchin long_name String Amount Mg Consumed D Gram Urchin
attribute amount_mg_consumed_d_gram_urchin units String millimeters
variable max_depth_grazed_mm double
attribute max_depth_grazed_mm _FillValue double NaN
attribute max_depth_grazed_mm actual_range double 0.013, 0.2
attribute max_depth_grazed_mm bcodmo_name String depth
attribute max_depth_grazed_mm description String maximum depth of sea urchin grazing scar on the coralline alga
attribute max_depth_grazed_mm long_name String Max Depth Grazed Mm
attribute max_depth_grazed_mm nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/DEPH/ (external link)
attribute max_depth_grazed_mm units String millimeters

 
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