Using 3D photogrammetry to quantify the subtle differences of coral reefs under the impacts of marine activities
Journal
Marine Pollution Bulletin
Journal Volume
173
Date Issued
2021
Author(s)
Chen G.K
Abstract
Marine activities may cause the degradation of coral reefs. The composition of benthic communities and seawater quality have been commonly used as the proxies to assess the impacts of marine activities. However, these proxies may not be able to detect the subtle differences within homogeneous environment. We used photogrammetry to quantify the subtle differences of structural complexity between heavily and lightly trafficked sites at Wanlitong, southern Taiwan. Our study demonstrated that the impacts of marine activities can be detected within tens of meters through quantifying structural complexity of coral reefs. Vector ruggedness measure (VRM) is a more suitable metric than conventional linear rugosity to detect such impacts. The correlations between structural complexity and coral cover have variances while comparing with previous studies. The results show that using photogrammetry to quantify the structure of coral reefs can provide a novel aspect to evaluate the subtle differences caused by marine activities. ? 2021 Elsevier Ltd
Subjects
Coral reef
Kenting national park
Marine activity
Photogrammetry
Structural complexity
Structure from motion
Reefs
3d photogrammetries
Benthic communities
Kenting
National parks
Seawater quality
complexity
coral reef
environmental degradation
national park
photogrammetry
quantitative analysis
three-dimensional modeling
article
motion
rugosity
Taiwan
animal
Anthozoa
ecosystem
Kenting National Park
sea water
Animals
Coral Reefs
Ecosystem
Seawater
Type
journal article