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    • Calcification rates of crustose coralline algae (CCA) derived from calcification accretion units (CAUs) deployed at coral reef sites in Timor-Leste from 2012-10-15 to 2014-10-09 (NCEI Accession 0170031)

    Metadata Updated: December 1, 2025

    The calcification rate data described here were collected by the NOAA Coral Reef Ecosystem Program (CREP) from calcification accretion units, or CAUs, moored for two years at fixed climate survey sites and located on hard bottom shallow water (< 15 m) habitats in Timor-Leste, in accordance with protocols developed by Price et al. (2012). Five CAUs were deployed at each survey site. Climate sites were established in Timor-Leste by CREP in October 2012 to establish ecological baselines for climate change by measuring multiple features of the coral reef environment (in addition to the data described herein) over time.

    CAUs, constructed in-house by CREP, are composed of two 10 x 10 cm flat, square, gray PVC plates, stacked 1 cm apart, and are attached to the benthos by SCUBA divers using stainless steel threaded rods. Deployed on the seafloor for a period of time, calcareous organisms, primarily crustose coralline algae and encrusting corals, recruit to these plates and accrete/calcify carbonate skeletons over time. By measuring the change in weight of the CAUs, the reef carbonate accretion rate can be calculated for that time period, measured in grams per centimeter per year.

    Laboratory experiments reveal calcification rates of crustose coralline algae (CCA) are strongly correlated to seawater aragonite saturation state. Predictions of reduced coral calcification rates, due to ocean acidification, suggest that coral reef communities will undergo ecological phase shifts as calcifying organisms are negatively impacted by changing seawater chemistry. CAUs are used by CREP to assess the current effects of changes in seawater carbonate chemistry on calcification and accretion rates of calcareous and fleshy algae.

    These calcification rate data for Timor-Leste, along with other data collected at the climate survey sites (water temperature and chemistry, invertebrate biodiversity, and benthic cover, all archived separately), serve as a baseline for detecting changes associated with changing seawater chemistry and can be used to help scientists assess and understand how Timor-Leste's coral reefs are responding to ocean acidification.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Date 2025-05-16T15:36:14Z
    Metadata Created Date December 4, 2020
    Metadata Updated Date December 1, 2025
    Reference Date(s) January 27, 2018 (publication), August 31, 2022 (revision)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NOAA/NESDIS/ncei/accessions

    Other Data Resources

    Graphic Preview

    Preview graphic

    Additional Metadata

    Resource Type Dataset
    Metadata Date 2025-05-16T15:36:14Z
    Metadata Created Date December 4, 2020
    Metadata Updated Date December 1, 2025
    Reference Date(s) January 27, 2018 (publication), August 31, 2022 (revision)
    Responsible Party (Point of Contact)
    Contact Email
    Guid gov.noaa.nodc:0170031
    Access Constraints Cite as: Coral Reef Ecosystem Program; Pacific Islands Fisheries Science Center (2018). Calcification rates of crustose coralline algae (CCA) derived from calcification accretion units (CAUs) deployed at coral reef sites in Timor-Leste from 2012-10-15 to 2014-10-09 (NCEI Accession 0170031). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0170031. Accessed [date]., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose., Coral Reef Ecosystem Program (CREP) Data Sharing Recommendations, version 9.0 updated August 12, 2015: CREP welcomes the opportunity to collaborate on research issues contributing to the scientific basis for better management of marine ecosystems. CREP has a very diverse set of field activities that generates large volumes of data using an array of data collection protocols. The following recommendations are for your consideration as you use this data: 1) Data analyses should take all field exigencies into account. The most effective way to do this would be active collaboration with CREP principal investigators. 2) In all presentations, product releases, or publications using data generated by CREP, proper acknowledgement of both CREP and the individuals responsible for data collection is expected. Citing the DOI (if available) is preferred, a non-DOI example is listed below. 3) If you collect or generate data for the same study areas, CREP requests that you share relevant information on complimentary data collections. 4) Those receiving data are strongly urged to inform the CREP Data Management Team of any errors and discrepancies that are discovered during the course of using these data. They are further urged to bring to the attention of the Team all problems and difficulties encountered in using these data. This information is necessary in order to improve the collections and to facilitate more efficient and economical data processing and retrieval. The users are asked to supply copies of any missing data that may be located, and to provide information as to significant subsets and special aggregations of data that are developed in using the material provided. Example citation: "This publication makes use of data products provided by the Coral Reef Ecosystem Program (CREP), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), with funding support from the United States Agency for International Development. The analysis and interpretations presented here are solely that of the current authors”
    Bbox East Long 127.312
    Bbox North Lat -8.22441
    Bbox South Lat -8.85329
    Bbox West Long 125.013
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Preview graphic
    Graphic Preview File https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0170031
    Graphic Preview Type PNG
    Harvest Object Id 70986357-fa4b-45df-9663-d21676a619e3
    Harvest Source Id c084a438-6f6b-470d-93e0-16aeddb9f513
    Harvest Source Title NOAA/NESDIS/ncei/accessions
    Licence accessLevel: Public
    Lineage
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[125.013, -8.85329], [127.312, -8.85329], [127.312, -8.22441], [125.013, -8.22441], [125.013, -8.85329]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2012-10-15
    Temporal Extent End 2014-10-09

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