期刊
ENVIRONMENTAL MONITORING AND ASSESSMENT
卷 183, 期 1-4, 页码 121-138出版社
SPRINGER
DOI: 10.1007/s10661-011-1912-2
关键词
Coral reefs; Stratified random survey design; Population estimation
资金
- Florida Keys National Marine Sanctuary [NA17RJ1226]
- National Park Service South Florida
- Caribbean Network
- Emerson Associates International
- NOAA [NA17RJ1226-SB19, NA17RJ1226-SB99, FKNMS-074-98]
- Florida Sea Grant College Program [R/C-E-50]
- National Park Service Cooperative Ecosystems Study Unit [H500000B494-J5120020275]
- NOAA National Undersea Research Center
- NOAA's National Undersea Research Center at the University of North Carolina-Wilmington
- SeaTow Key Largo
Principles of probability survey design were applied to guide large-scale sampling of populations of stony corals and associated benthic taxa in the Florida Keys coral reef ecosystem. The survey employed a two-stage stratified random sampling design that partitioned the 251-km(2) domain by reef habitat types, geographic regions, and management zones. Estimates of the coefficient of variation (ratio of standard error to the mean) for stony coral population density and abundance ranged from 7% to 12% for four of six principal species. These levels of survey precision are among the highest reported for comparable surveys of marine species. Relatively precise estimates were also obtained for octocoral density, sponge frequency of occurrence, and benthic cover of algae and invertebrates. Probabilistic survey design techniques provided a robust framework for estimating population-level metrics and optimizing sampling efficiency.
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