National Coral Reef Monitoring Program: Erosion data from bioerosion monitoring units (BMUs) deployed at select coral reef sites in the Pacific Ocean
The erosion rates provided in this collection were gathered from bioerosion monitoring units (BMUs) retrieved at existing long-term monitoring sites at Wake Island and the Hawaiian and Mariana Archipelagos during NOAA Pacific Islands Fisheries Science Center (PIFSC), Coral Reef Ecosystem Program (CREP) led National Coral Reef Monitoring Program (NCRMP) missions. The samples were analyzed at NOAA’s Atlantic Oceanographic and Meteorological Laboratory (AOML), as part of NOAA's ongoing NCRMP. BMUs are constructed from clean coral skeletons and left on the reef for a period of 3 years. This collection of data contains the first run of BMUs that has ever been produced, and as such, the protocol established at the time was shortly thereafter amended in order to give a more thorough picture of bioerosion rates. Early analysis procedures utilized a benchtop micro computed tomography scanner (microCT, Bruker) for initial scans (pre-deployment), while post collection analyses (including those in this collection) were analyzed by a larger Computed Tomography device (CT scanner, Siemens).
BMUs are CT scanned for changes in density, volume and mass in which rates of bioerosion can be assessed. Annual erosion and accretion rates can be determined from these data in terms of loss of reef structure volume as well as mass in grams of calcium carbonate. Accretion rates given in this collection are determined by finding the volume of non-original carbonate material found on the external surface of the BMUs divided by the number of years the BMU was deployed on the reef. These rates can detect accretion signals when calcifying organisms, such as corals or algae, have grown on their exteriors. Rates of macroboring were determined by changes in the internal volume of the BMUs (e.g., that removed by bore holes) divided by the number of years the BMU was deployed on the reef. Macroboring can occur from eroders such as clionaid sponges, annelids and other macroboring fauna.
BMUs are CT scanned for changes in density, volume and mass in which rates of bioerosion can be assessed. Annual erosion and accretion rates can be determined from these data in terms of loss of reef structure volume as well as mass in grams of calcium carbonate. Accretion rates given in this collection are determined by finding the volume of non-original carbonate material found on the external surface of the BMUs divided by the number of years the BMU was deployed on the reef. These rates can detect accretion signals when calcifying organisms, such as corals or algae, have grown on their exteriors. Rates of macroboring were determined by changes in the internal volume of the BMUs (e.g., that removed by bore holes) divided by the number of years the BMU was deployed on the reef. Macroboring can occur from eroders such as clionaid sponges, annelids and other macroboring fauna.
Dataset Citation
- Cite as: NOAA Atlantic Oceanographic and Meteorological Laboratory; National Oceanic and Atmospheric Administration (2018). National Coral Reef Monitoring Program: Erosion data from bioerosion monitoring units (BMUs) deployed at select coral reef sites in the Pacific Ocean. [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/esff-pv90. Accessed [date].
Dataset Identifiers
ISO 19115-2 Metadata
gov.noaa.nodc:NCRMP-BMU-Pacific
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NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov |
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NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Time Period | 2013-08-03 to Present |
Spatial Bounding Box Coordinates |
West: -175.99722
East: -154.8176
South: 19.06075
North: 27.95493
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Dataset Progress Status | Ongoing - data is continually being updated Historical archive - data has been stored in an offline storage facility |
Data Update Frequency | As needed |
Supplemental Information | Accessions 0173209, 0184292, 0209106, 0236235, and 0287028 |
Purpose | The NOAA National Coral Reef Monitoring Program (NCRMP) details a long-term approach to provide an ecosystem perspective via monitoring climate, fish, benthic, and socioeconomic variables in a consistent and integrated manner. The NCRMP is intended to coordinate various NOAA Coral Reef Conservation Program (CRCP) biological, physical, and human dimensions activities into a cohesive NOAA-wide effort. Through the implementation of the NCRMP, NOAA will be able to clearly and concisely communicate results of national-scale monitoring to national, state, and territorial policy makers, resource managers, and the public on a periodic basis. To support a long-term Coral Reef Conservation Program for sustainable management and conservation of coral reef ecosystems bioerosion time series data—along with other data collected at the survey sites (archived separately under NCRMP)—are used to help scientists assess and understand how coral reefs monitored by the NOAA Coral Reef Ecosystem Program (CREP) are responding to ocean acidification. |
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Last Modified: 2024-02-21T13:40:56Z
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov