Journal
SUSTAINABILITY
Volume 11, Issue 13, Pages -Publisher
MDPI
DOI: 10.3390/su11133695
Keywords
seagrass; spectroradiometry; reflectance; optically shallow coastal waters; remote sensing; benthic bottom type
Funding
- 2012-2013 Premier's Research and Industry Fund (PRIF), Department of Further Education, Employment, Science, and Technology (DFEEST), Government of South Australia, Australia [CS7665]
- National Cheng Kung University (NCKU) Distinguished International Student Scholarship
- NCKU Dept. of Engineering International Student Scholarship
- NCKU Dept. of Engineering Research Assistantship
- CTCI Foundation Scholarship for Overseas Graduate Students
Ask authors/readers for more resources
Seagrasses are a vulnerable and declining coastal habitat, which provide shelter and substrate for aquatic microbiota, invertebrates, and fishes. More accurate mapping of seagrasses is imperative for their sustainability but is hindered by the lack of data on reflectance spectra representing the optical signatures of individual species. Objectives of this study are: (1) To determine distinct characteristics of spectral profiles for sand versus three temperate seagrasses (Posidonia, Amphibolis, and Heterozostera); (2) to evaluate the most efficient derivative analysis method of spectral reflectance profiles for determining benthic types; and to assess the influences of (3) site location and (4) the water column on spectral responses. Results show that 566:689 and 566:600 bandwidth ratios are useful in separating seagrasses from sand and from detritus and algae, respectively; first-derivative reflectance spectra generally is the most efficient method, especially with deconvolution analyses further helping to reveal and isolate 11 key wavelength dimensions; and differences between sites and water column composition, which can include suspended particulate matter, both have no effect on endmembers. These findings helped develop a spectral reflectance library that can be used as an endmember reference for remote sensing, thereby providing continued monitoring, assessment, and management of seagrasses.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available