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Title Sum-
Institution Dataset ID
     data   graph     files  public Data from reciprocal transplant experiments conducted on Porites coral collected on Palau in
December 2012
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The Dataset's Variables and Attributes

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 Methods reprinted from Barkley et al. 2017:
Coral collection:\u00a0Coral plugs were collected in December 2012 from
massive Porites colonies at a naturally low-\u03a9ar reef site (7.324 N,
134.493 E; mean \u03a9ar = 2.3; n = 78) and a naturally high-\u03a9ar reef
site (7.268 N, 134.522 E; mean \u03a9ar = 3.7; n = 75). At each reef site,
small skeletal cores (diameter = 3.5 cm) were removed from massive colonies
(one core per colony) at 2-3m depth using underwater pneumatic drills, and
cores were cut with a lapidary table saw to approximately 1 cm below the
tissue layer. The plugs were affixed to nylon square base screws with marine
epoxy, secured to egg crate racks, and returned to their original reefs to
allow the corals to recover from the coring procedure. All corals survived two
months of recovery on the reef and on all corals living tissue had fully
overgrown the sides of the plugs so that no underlying skeleton was exposed.
Corals were recovered in February 2013.

Reciprocal transplant experiment:\u00a0The reciprocal transplant experiment
was conducted concurrently with the CO2 manipulation experiment. Initial
buoyant weight measurements were obtained for all corals prior to
transplantation. Of the corals collected from the low-\u03a9ar reef and from
the high-\u03a9ar reef (n = 44 for each reef), approximately half of the
corals in each group was returned to their reef of origin (low-\u03a9ar to
low-\u03a9ar: n = 23, high-\u03a9ar to high-\u03a9ar: n = 21), while the
remaining corals were transplanted to the opposite reef (low-\u03a9ar to
high-\u03a9ar: n = 21, high-\u03a9ar to low-\u03a9ar: n = 23). All corals were
transplanted to the same depth (5m). In May 2013, after eight weeks in the
field (and at the end of the CO2 manipulation experiment), approximately half
of the corals from each reef (n = 10-12 per transplant group) were recovered
and weighed. The remaining corals were left out on the two reefs for 17 months
(n = 10-11 per group). In August 2014, these corals were recovered from the
reef.\u00a0Corals were evaluated for partial or total mortality, and were
judged to be alive (no visible tissue death observed), partially dead (visible
tissue death and/or tissue recession but some living tissue remaining), or
dead (no living tissue remaining). Buoyant weights were collected for all
corals to determine overall calcification rates during the reciprocal
transplant period. Because coral tissue is assumed to be neutrally buoyant
(i.e. it does not contribute to buoyant weight measurements) and the timing of
tissue death during the 17-month transplant was unknown, the overall change in
skeletal mass was calculated and reported for all corals regardless of
mortality status.
attribute NC_GLOBAL awards_0_award_nid String 520400
attribute NC_GLOBAL awards_0_award_number String OCE-1220529
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward?AWD_ID=1220529 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String David L. Garrison
attribute NC_GLOBAL awards_0_program_manager_nid String 50534
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Reciprocal transplant experiments on Palau Porites coral
PI: Anne Cohen (WHOI)
Contact: Hannah Barkley (WHOI)
Version: 23 June 2017
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 2017-06-23T18:48:39Z
attribute NC_GLOBAL date_modified String 2019-08-02T18:45:30Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.705851.1
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/705851 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String Manual Biota Sampler
attribute NC_GLOBAL instruments_0_dataset_instrument_description String At each reef site, small skeletal cores (diameter = 3.5 cm) were removed from massive colonies (one core per colony) at 2–3mdepth using underwater pneumatic drills.
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 705855
attribute NC_GLOBAL instruments_0_description String Manual Biota Sampler indicates that a sample was collected in situ by a person, possibly using a hand-held collection device such as a jar, a net or their hands.
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/90/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String Manual Biota Sampler
attribute NC_GLOBAL instruments_0_instrument_nid String 565
attribute NC_GLOBAL instruments_0_supplied_name String pneumatic drill
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, calc, calc_rate, chemical, code, coral, coral_id, data, dataset, dmo, duration, erddap, management, oceanography, office, omega, original, original_omegaAR, preliminary, rate, status, transplant, transplant_duration, transplant_omegaAR, treatment, treatment_code
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/705851/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/705851 (external link)
attribute NC_GLOBAL param_mapping String {'705851': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/705851/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_0_affiliation_acronym String WHOI
attribute NC_GLOBAL people_0_person_name String Anne L Cohen
attribute NC_GLOBAL people_0_person_nid String 51428
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 Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_1_affiliation_acronym String WHOI
attribute NC_GLOBAL people_1_person_name String Hannah Barkley
attribute NC_GLOBAL people_1_person_nid String 560803
attribute NC_GLOBAL people_1_role String Contact
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL people_2_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_2_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_2_person_name String Shannon Rauch
attribute NC_GLOBAL people_2_person_nid String 51498
attribute NC_GLOBAL people_2_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_2_role_type String related
attribute NC_GLOBAL project String Coral Reef Ecosystem OA Impact
attribute NC_GLOBAL projects_0_acronym String Coral Reef Ecosystem OA Impact
attribute NC_GLOBAL projects_0_description String text copied from the NSF award abstract:
Much of our understanding of the impact of ocean acidification on coral reef calcification comes from laboratory manipulation experiments in which reef organisms are removed from their natural habitat and reared under conditions of calcium carbonate saturation (Omega) predicted for the tropical oceans at the end of this century. By comparison, there is a paucity of in situ data describing the sensitivity of coral reef ecosystems to changes in calcium carbonate saturation. Yet emerging evidence suggests there may be critical differences between the calcification response of organisms in culture and the net calcification response of a coral reef ecosystem, to the same degree of change in calcium carbonate saturation. In the majority of cases, the sensitivity of net reef calcification to changing calcium carbonate saturation is more severe than laboratory manipulation experiments predict. Clearly, accurate predictions of the response of coral reef ecosystems to 21st century ocean acidification will depend on a robust characterization of ecosystem-scale responses and an understanding of the fundamental processes that shape them. Using existing data, the investigators show that the sensitivity of coral reef ecosystem calcification to Delta calcium carbonate saturation conforms to the empirical rate equation R=k(Aragonite saturation state -1)n, which also describes the relationship between the rate of net abiogenic CaCO3 precipitation (R) and the degree of Aragonite supersaturation (Aragonite saturation state-1). By implication, the net ecosystem calcification (NEC) response to ocean acidification is governed by fundamental laws of physical chemistry and is potentially predictable across space and time. When viewed this way, the existing, albeit sparse, dataset of NEC reveals distinct patterns that, if verified, have important implications for how different coral reef ecosystems will respond to 21st century ocean acidification. The investigators have outlined a research program designed to build on this proposition. The project expands the currently sparse dataset of ecosystem-scale observations at four strategically placed reef sites: 2 sites in the Republic of Palau, Caroline Islands, Micronesia, western Pacific Ocean; a third at Dongsha Atoll, Pratas Islands, South China Sea; and the fourth at Kingman Reef, US Northern Line Islands, 6 deg. 23 N, 162 deg. 25 W.  The four selected sites will allow investigators to test the following hypotheses: (1) The sensitivity ("n" in the rate equation) of coral reef ecosystem calcification to Delta Aragonite saturation state decreases with decreasing Aragonite saturation state. By implication, the rate at which reef calcification declines will slow as ocean acidification progresses over the course of this century. (2) The energetic status of the calcifying community is a key determinant of absolute rates of net ecosystem calcification ("k" in the rate equation), which, combined with n, defines the Aragonite saturation state value at which NEC approaches zero. By implication, the shift from net calcification to net dissolution will be delayed in healthy, energetically replete coral reef ecosystems and accelerated in perturbed, energetically depleted ecosystems. and (3) The calcification response of individual colonies of dominant reef calcifiers (corals and algae) is weaker than the measured ecosystem-scale response to the same change in Aragonite saturation state. By implication, processes not adequately captured in laboratory experiments, such as bioerosion and dissolution, will play an important role in the coral reef response to ocean acidification.
Broader Impacts: Ocean acidification threatens the livelihoods of 500 million people worldwide who depend on coral reefs to provide habitable and agricultural land, food, building materials, coastal protection and income from tourism. Yet data emerging from ocean acidification (OA) studies point to critical gaps in our knowledge of reef ecosystem-scale responses to OA that currently limit our ability to predict the timing and severity of its impact on different reefs in different parts of the world. Using existing data generated by the investigators and others, this project will address a series of related hypotheses, which, if verified by the research, will have an immediate, direct impact on predictions of coral reef resilience in a high CO2 world. This project brings together expertise in coral reef biogeochemistry, chemical oceanography and physical oceanography to focus on a problem that has enormous societal, economic and conservation relevance. In addition to sharing the resultant data via BCO-DMO, project data will also be contributed to the Ocean Acidification International Coordination Centre (OA-ICC) data collection hosted at the PANGAEA Open Access library (http://www.pangaea.de).
attribute NC_GLOBAL projects_0_end_date String 2015-08
attribute NC_GLOBAL projects_0_geolocation String Republic of Palau, Caroline Islands, Micronesia, western Pacific Ocean; Dongsha Atoll, Pratas Islands, South China Sea; Kingman Reef, US Northern Line Islands, 6 deg. 23 N, 162 deg. 25 W
attribute NC_GLOBAL projects_0_name String Toward Predicting the Impact of Ocean Acidification on Net Calcification by a Broad Range of Coral Reef Ecosystems: Identifying Patterns and Underlying Causes
attribute NC_GLOBAL projects_0_project_nid String 520413
attribute NC_GLOBAL projects_0_start_date String 2012-09
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 Data from reciprocal transplant experiments conducted on Porites coral collected on Palau in December 2012.
attribute NC_GLOBAL title String Data from reciprocal transplant experiments conducted on Porites coral collected on Palau in December 2012
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable coral_id   String  
attribute coral_id bcodmo_name String sample
attribute coral_id description String Unique identification number for each transplanted coral
attribute coral_id long_name String Coral Id
attribute coral_id nerc_identifier String https://vocab.nerc.ac.uk/collection/P02/current/ACYC/ (external link)
attribute coral_id units String unitless
variable transplant_duration   byte  
attribute transplant_duration _FillValue byte 127
attribute transplant_duration actual_range byte 2, 17
attribute transplant_duration bcodmo_name String duration
attribute transplant_duration description String Length of transplant experiment (2 or 17 months)
attribute transplant_duration long_name String Transplant Duration
attribute transplant_duration units String months
variable original_omegaAR   float  
attribute original_omegaAR _FillValue float NaN
attribute original_omegaAR actual_range float 2.3, 3.7
attribute original_omegaAR bcodmo_name String OM_ar
attribute original_omegaAR description String Aragonite saturation state of reef where coral was collected
attribute original_omegaAR long_name String Original Omega AR
attribute original_omegaAR units String unitless
variable transplant_omegaAR   float  
attribute transplant_omegaAR _FillValue float NaN
attribute transplant_omegaAR actual_range float 2.3, 3.7
attribute transplant_omegaAR bcodmo_name String OM_ar
attribute transplant_omegaAR description String Aragonite saturation state of reef where coral was transplanted
attribute transplant_omegaAR long_name String Transplant Omega AR
attribute transplant_omegaAR units String unitless
variable treatment_code   String  
attribute treatment_code bcodmo_name String treatment
attribute treatment_code description String Indicates return to reef of origin (O) or transplanted to opposite reef (T)
attribute treatment_code long_name String Treatment Code
attribute treatment_code units String unitless
variable calc_rate   float  
attribute calc_rate _FillValue float NaN
attribute calc_rate actual_range float -24.82, 47.67
attribute calc_rate bcodmo_name String calcification
attribute calc_rate description String Calcification rate of corals measured by buoyant weight
attribute calc_rate long_name String Calc Rate
attribute calc_rate units String milligrams per square centimeter per month (mg/cm2/month)
variable status   String  
attribute status bcodmo_name String sample_descrip
attribute status description String Health status of corals at end of transplant experiment (live, partially dead, or dead)
attribute status long_name String Status
attribute status units String unitless

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.

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