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Dataset Title:  Results from experiment examining effects of 2 different isotope spikes on
growth rates of scleractinian corals; from the Cohen lab at WHOI in Woods Hole,
MA (OA Nutrition and Coral Calcification project)
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_489449)
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
 
   Maximum ?
 
 treatment (dimensionless) ?          "16C_135Ba"    "26C_86Sr"
 growth_rate_pre (dimensionless) ?          2.38195E-4    0.004602512
 growth_rate_post (dimensionless) ?          -6.59826E-4    0.005540855
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  treatment {
    String bcodmo_name "treatment";
    String description "Experimental treatment: combination of water temperature and isotope spike used to mark the coral. Corals marked with 86Sr were held at either 19 or 26 degrees Celsius. Corals marked with 135Ba were held at either 16 or 24 degrees Celsius.";
    String long_name "Treatment";
    String units "dimensionless";
  }
  growth_rate_pre {
    Float32 _FillValue NaN;
    Float32 actual_range 2.38195e-4, 0.004602512;
    String bcodmo_name "unknown";
    String description "Relative coral growth pre-treatment. For 86Sr, growth was estimated from changes in buoyant weight (per Holcomb et al., 2010) for the 5 months prior to and the month following the isotope spike. For 135Ba, growth was estimated from changes in buoyant weight for the 2 months prior and one month following isotope exposure.";
    String long_name "Growth Rate Pre";
    String units "dimensionless";
  }
  growth_rate_post {
    Float32 _FillValue NaN;
    Float32 actual_range -6.59826e-4, 0.005540855;
    String bcodmo_name "unknown";
    String description "Relative coral growth post-treatment. For 86Sr, growth was estimated from changes in buoyant weight (per Holcomb et al., 2010) for the 5 months prior to and the month following the isotope spike. For 135Ba, growth was estimated from changes in buoyant weight for the 2 months prior and one month following isotope exposure.";
    String long_name "Growth Rate Post";
    String units "dimensionless";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv";
    String acquisition_description 
"Methodology as described in Holcomb et al. (2013):
 
Colonies of the temperate scleractinian coral Astrangia poculata were
collected and processed as previously described. Newly settled polyps and
their associated substratum were attached to slides. The slides with corals
were suspended vertically in a flow-through aquarium receiving 20 micrometers
filtered Vineyard Sound seawater. Corals experienced a temperature range of 14
to 30 degrees C. Aquaria were aerated, and corals were maintained under these
conditions for at least one month prior to use in experiments. A mixture of
brown and white colonies (zooxanthellate and azooxanthellate colonies) was
used for all treatments.
 
For the marking experiments, corals were placed in pre-washed containers with
lids containing ~800 ml of water from the source aquarium. Airstones were
added to each container and each container bubbled continuously. Containers
were held within a water bath with a temperature similar to that of the source
aquarium.
 
Ba 135 or Sr 86 isotope spikes (purchased as carbonate salts from Oak Ridge
National Lab) were used as markers in some incubations. See the \\\"[coral
growth dye experiment](\\\\\"https://www.bco-dmo.org/dataset/489382\\\\\")\\\" dataset
for results from marking experiments using one of four dyes (alizarin,
alizarin complexone, calcein, and oxytetracycline).
 
The isotope spike marking was carried out as part of long term growth
experiments (see Holcomb et al. 2010 and 2012). Six to sixteen corals were
used in each of the isotope spike treatments. For marking with 86Sr, 60
microliters of an 86Sr solution were added to ~800 ml seawater and the corals
were incubated for two days. Growth was estimated from changes in buoyant
weight (per Holcomb et al., 2010) for the 5 months prior to and the month
following the isotope spike. Corals were held at one of two temperatures: ~19
or ~26 degrees C throughout that six month period.
 
Spikes with 135Ba were carried out in a flow-through aquarium system (see
Holcomb et al., 2012). Each reservoir supplying water to individual aquaria
was spiked with 81 microliters of 135Ba solution per liter of seawater. The
aquaria received spiked seawater for two days, after which unspiked seawater
was added to the reservoir, diluting the spike. Buoyant weights were measured
for the two months prior and one month following isotope exposure using a
Sartorius G803S balance, and the aquaria were held at either 16 or 24 degrees
C throughout this time.";
    String awards_0_award_nid "54896";
    String awards_0_award_number "OCE-1041106";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1041106";
    String awards_0_funder_name "NSF Division of Ocean Sciences";
    String awards_0_funding_acronym "NSF OCE";
    String awards_0_funding_source_nid "355";
    String awards_0_program_manager "David L. Garrison";
    String awards_0_program_manager_nid "50534";
    String cdm_data_type "Other";
    String comment 
"Coral growth (species <i>Astrangia poculata</i>) isotope spike experiments  
 PI: Anne Cohen (WHOI) 
 Contact: Michael Holcomb 
 Version: 31 Jan 2014";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_type "institution";
    String creator_url "https://www.bco-dmo.org/";
    String data_source "extract_data_as_tsv version 2.3  19 Dec 2019";
    String date_created "2014-02-03T18:09:56Z";
    String date_modified "2019-11-14T19:52:59Z";
    String defaultDataQuery "&amp;time&lt;now";
    String doi "10.1575/1912/bco-dmo.489449.1";
    String history 
"2022-01-23T05:31:04Z (local files)
2022-01-23T05:31:04Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_489449.html";
    String infoUrl "https://www.bco-dmo.org/dataset/489449";
    String institution "BCO-DMO";
    String instruments_0_acronym "Aquarium";
    String instruments_0_dataset_instrument_nid "489462";
    String instruments_0_description "Aquarium - a vivarium consisting of at least one transparent side in which water-dwelling plants or animals are kept";
    String instruments_0_instrument_name "Aquarium";
    String instruments_0_instrument_nid "711";
    String instruments_0_supplied_name "Aquarium";
    String instruments_1_acronym "Scale";
    String instruments_1_dataset_instrument_description "Buoyant weights were measured using a Sartorius G803S balance.";
    String instruments_1_dataset_instrument_nid "489464";
    String instruments_1_description "An instrument used to measure weight or mass.";
    String instruments_1_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB13/";
    String instruments_1_instrument_name "Scale";
    String instruments_1_instrument_nid "714";
    String instruments_1_supplied_name "Balance";
    String keywords "bco, bco-dmo, biological, chemical, data, dataset, dmo, erddap, growth, growth_rate_post, growth_rate_pre, management, oceanography, office, post, pre, preliminary, rate, treatment";
    String license "https://www.bco-dmo.org/dataset/489449/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/489449";
    String param_mapping "{'489449': {}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/489449/parameters";
    String people_0_affiliation "Woods Hole Oceanographic Institution";
    String people_0_affiliation_acronym "WHOI";
    String people_0_person_name "Anne L Cohen";
    String people_0_person_nid "51428";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "Woods Hole Oceanographic Institution";
    String people_1_affiliation_acronym "WHOI";
    String people_1_person_name "Michael Holcomb";
    String people_1_person_nid "489381";
    String people_1_role "Contact";
    String people_1_role_type "related";
    String people_2_affiliation "Woods Hole Oceanographic Institution";
    String people_2_affiliation_acronym "WHOI BCO-DMO";
    String people_2_person_name "Shannon Rauch";
    String people_2_person_nid "51498";
    String people_2_role "BCO-DMO Data Manager";
    String people_2_role_type "related";
    String project "OA Nutrition and Coral Calcification";
    String projects_0_acronym "OA Nutrition and Coral Calcification";
    String projects_0_description 
"The project description is a modification of the original NSF award abstract.
This research project is part of the larger NSF funded CRI-OA collaborative research initiative and was funded as an Ocean Acidification-Category 1, 2010 award. Over the course of this century, all tropical coral reef ecosystems, whether fringing heavily populated coastlines or lining remote islands and atolls, face unprecedented threat from ocean acidification caused by rising levels of atmospheric CO2. In many laboratory experiments conducted to date, calcium carbonate production (calcification) by scleractinian (stony) corals showed an inverse correlation to seawater saturation state OMEGAar), whether OMEGAar was manipulated by acid or CO2 addition. Based on these data, it is predicted that coral calcification rates could decline by up to 80% of modern values by the end of this century. A growing body of new experimental data however, suggests that the coral calcification response to ocean acidification may be less straightforward and a lot more variable than previously recognized. In at least 10 recent experiments including our own, 8 different tropical and temperate species reared under nutritionally-replete but significantly elevated CO2 conditions (780-1200 ppm, OMEAGar ~1.5-2), continued to calcify at rates comparable to conspecifics reared under ambient CO2. These experimental results are consistent with initial field data collected on reefs in the eastern Pacific and southern Oman, where corals today live and accrete their skeletons under conditions equivalent to 2X and 3X pre-industrial CO2. On these high CO2, high nutrient reefs (where nitrate concentrations typically exceed 2.5 micro-molar), coral growth rates rival, and sometimes even exceed, those of conspecifics in low CO2, oligotrophic reef environments.
The investigators propose that a coral's energetic status, tightly coupled to the availability of inorganic nutrients and/or food, is a key factor in the calcification response to CO2-induced ocean acidification. Their hypothesis, if confirmed by the proposed laboratory investigations, implies that predicted changes in coastal and open ocean nutrient concentrations over the course of this century, driven by both climate impacts on ocean stratification and by increased human activity in coastal regions, could play a critical role in exacerbating and in some areas, modulating the coral reef response to ocean acidification. This research program builds on the investigators initial results and observations. The planned laboratory experiments will test the hypothesis that: (1) The coral calcification response to ocean acidification is linked to the energetic status of the coral host. The relative contribution of symbiont photosynthesis and heterotrophic feeding to a coral's energetic status varies amongst species. Enhancing the energetic status of corals reared under high CO2, either by stimulating photosynthesis with inorganic nutrients or by direct heterotrophic feeding of the host lowers the sensitivity of calcification to decreased seawater OMEGAar; (2) A species-specific threshold CO2 level exists over which enhanced energetic status can no longer compensate for decreased OMEGAar of the external seawater. Similarly, we will test the hypothesis that a nutrient threshold exists over which nutrients become detrimental for calcification even under high CO2 conditions; and (3) Temperature-induced reduction of algal symbionts is one stressor that can reduce the energetic reserve of the coral host and exacerbate the calcification response to ocean acidification.
The investigator's initial findings highlight the critical importance of energetic status in the coral calcification response to ocean acidification. Verification of these findings in the laboratory, and identification of nutrient and CO2 thresholds for a range of species will have immediate, direct impact on predictions of reef resilience in a high CO2 world. The research project brings together a diverse group of expertise in coral biogeochemistry, chemical oceanography, molecular biology and coral reproductive ecology to focus on a problem that has enormous societal, economic and conservation relevance.";
    String projects_0_end_date "2013-09";
    String projects_0_geolocation "global; experimental";
    String projects_0_name "An Investigation of the Role of Nutrition in the Coral Calcification Response to Ocean Acidification";
    String projects_0_project_nid "2183";
    String projects_0_start_date "2010-10";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Results from experiment examining effects of 2 different isotope spikes on growth rates of scleractinian corals; from the Cohen lab at WHOI in Woods Hole, MA.";
    String title "Results from experiment examining effects of 2 different isotope spikes on growth rates of scleractinian corals; from the Cohen lab at WHOI in Woods Hole, MA (OA Nutrition and Coral Calcification project)";
    String version "1";
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

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