globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13482
论文题名:
Fishing degrades size structure of coral reef fish communities
作者: Robinson J.P.W.; Williams I.D.; Edwards A.M.; McPherson J.; Yeager L.; Vigliola L.; Brainard R.E.; Baum J.K.
刊名: Global Change Biology
出版年: 2017
卷: 23, 期:3
起始页码: 1009
结束页码: 1022
语种: 英语
英文关键词: body size ; community structure ; coral reef fish ; exploitation ; fisheries ; macroecology ; overfishing ; size spectra ; size-based approaches
Scopus关键词: Anthozoa ; Pisces
英文摘要: Fishing pressure on coral reef ecosystems has been frequently linked to reductions of large fishes and reef fish biomass. Associated impacts on overall community structure are, however, less clear. In size-structured aquatic ecosystems, fishing impacts are commonly quantified using size spectra, which describe the distribution of individual body sizes within a community. We examined the size spectra and biomass of coral reef fish communities at 38 US-affiliated Pacific islands that ranged in human presence from near pristine to human population centers. Size spectra ‘steepened’ steadily with increasing human population and proximity to market due to a reduction in the relative biomass of large fishes and an increase in the dominance of small fishes. Reef fish biomass was substantially lower on inhabited islands than uninhabited ones, even at inhabited islands with the lowest levels of human presence. We found that on populated islands size spectra exponents decreased (analogous to size spectra steepening) linearly with declining biomass, whereas on uninhabited islands there was no relationship. Size spectra were steeper in regions of low sea surface temperature but were insensitive to variation in other environmental and geomorphic covariates. In contrast, reef fish biomass was highly sensitive to oceanographic conditions, being influenced by both oceanic productivity and sea surface temperature. Our results suggest that community size structure may be a more robust indicator than fish biomass to increasing human presence and that size spectra are reliable indicators of exploitation impacts across regions of different fish community compositions, environmental drivers, and fisheries types. Size-based approaches that link directly to functional properties of fish communities, and are relatively insensitive to abiotic variation across biogeographic regions, offer great potential for developing our understanding of fishing impacts in coral reef ecosystems. © 2016 John Wiley & Sons Ltd
资助项目: Robinson, J.P.W. ; Department of Biology, University of Victoria, PO BOX 1700 Station CSC, Canada ; 电子邮件: jpwrobinson@gmail.com
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61029
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Biology, University of Victoria, PO BOX 1700 Station CSC, Victoria, BC, Canada; Pacific Islands Fisheries Science Center, Coral Reef Ecosystem Program, National Oceanic and Atmospheric Administration, 1845 Wasp Boulevard, Building 176, Honolulu, HI, United States; Pacific Biological Station, Fisheries and Oceans Canada, 3190 Hammond Bay Road, Nanaimo, BC, Canada; Centre for Conservation Research, Calgary Zoological Society, 1300 Zoo Road NE, Calgary, AB, Canada; Department of Biological Sciences, Simon Fraser University, Burnaby, BC, Canada; National Socio-Environmental Synthesis Center, 1 Park Place Suite 300, Annapolis, MD, United States; Institut de Recherche pour le Développement (IRD), UMR ENTROPIE, Laboratoire d'Excellence LABEX CORAIL, BP A5, Noumea, New Caledonia, France

Recommended Citation:
Robinson J.P.W.,Williams I.D.,Edwards A.M.,et al. Fishing degrades size structure of coral reef fish communities[J]. Global Change Biology,2017-01-01,23(3)
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