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Comparing coral demographic surveys from in situ observations and Structure-from-Motion imagery shows low methodological bias
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2021
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[PDF-2.07 MB]
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Description:NOAA’s Ecosystem Sciences Division (ESD) at the Pacific Islands Fisheries Science Center (PIFSC) executes the NOAA Coral Reef Conservation Program’s National Coral Reef Monitoring Program (NCRMP) across 40 primary islands, atolls, and shallow banks in the U.S. Pacific. Through funding from CRCP, ESD works to understand how reefs are responding, in both time and space, to local and global disturbances, and what factors enhance reef resilience.Assessments of benthic cover and coral demography are key components of ESD’s Pacific-NCRMP and have historically been conducted using in situvisual surveys and photoquadrats by a team of three to four divers. With NOAA’s aging vessel infrastructure and increasing complexities of field missions, ESD is exploring innovative technologies to monitor more efficiently benthic communities. One approach gaining traction in reef sciences is photogrammetry, also known as Structure from Motion (SfM), which generates 3D reconstructions of a scene from overlapping images.SfM is a low-cost method, compared to techniques such as light detection and ranging (LIDAR). Here, we quantitatively compare data generated from in situsurveys to SfM-derived metrics for assessing coral demography to evaluate whether ESD can maintain continuity in our long-term NCRMP data sets if the program transitions to SfM survey methods.
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CoRIS Project ID:NOAA CRCP Project ; ID 31289
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Rights Information:Public Domain
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