DOI: 10.1111/gcb.13882
Scopus记录号: 2-s2.0-85030171173
论文题名: Human activities as a driver of spatial variation in the trophic structure of fish communities on Pacific coral reefs
作者: Ruppert J.L.W. ; Vigliola L. ; Kulbicki M. ; Labrosse P. ; Fortin M.-J. ; Meekan M.G.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 1 起始页码: e67
结束页码: e79
语种: 英语
英文关键词: biogeography
; habitat
; multiscale analysis
; socioeconomic
; spatial food webs
; structural equation models
Scopus关键词: biogeography
; coral reef
; fish
; food web
; habitat
; human activity
; numerical model
; socioeconomic impact
; spatial variation
; trophic structure
; Pacific Ocean
; Anthozoa
; Carcharhinus springeri
; Chondrichthyes
; Pisces
; animal
; biomass
; classification
; coral reef
; environmental protection
; fish
; food chain
; human activities
; Pacific Ocean
; Animals
; Biomass
; Conservation of Natural Resources
; Coral Reefs
; Fishes
; Food Chain
; Human Activities
; Pacific Ocean
英文摘要: Anthropogenic activities such as land-use change, pollution and fishing impact the trophic structure of coral reef fishes, which can influence ecosystem health and function. Although these impacts may be ubiquitous, they are not consistent across the tropical Pacific Ocean. Using an extensive database of fish biomass sampled using underwater visual transects on coral reefs, we modelled the impact of human activities on food webs at Pacific-wide and regional (1,000s–10,000s km) scales. We found significantly lower biomass of sharks and carnivores, where there were higher densities of human populations (hereafter referred to as human activity); however, these patterns were not spatially consistent as there were significant differences in the trophic structures of fishes among biogeographic regions. Additionally, we found significant changes in the benthic structure of reef environments, notably a decline in coral cover where there was more human activity. Direct human impacts were the strongest in the upper part of the food web, where we found that in a majority of the Pacific, the biomass of reef sharks and carnivores were significantly and negatively associated with human activity. Finally, although human-induced stressors varied in strength and significance throughout the coral reef food web across the Pacific, socioeconomic variables explained more variation in reef fish trophic structure than habitat variables in a majority of the biogeographic regions. Notably, economic development (measured as GDP per capita) did not guarantee healthy reef ecosystems (high coral cover and greater fish biomass). Our results indicate that human activities are significantly shaping patterns of trophic structure of reef fishes in a spatially nonuniform manner across the Pacific Ocean, by altering processes that organize communities in both “top-down” (fishing of predators) and “bottom-up” (degradation of benthic communities) contexts. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110618
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Laboratoire d'Excellence LABEX CORAIL, IRD (Institut de Recherche pour le Développement), UMR 250 ENTROPIE, Nouméa, France; Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada; Australian Institute of Marine Science, c/o UWA Oceans Institute (MO96), Crawley, WA, Australia; Laboratoire d'Excellence LABEX CORAIL, IRD (Institut de Recherche pour le Développement), UMR 250 ENTROPIE, Perpignan, France; Haut-Commissariat de la République en Nouvelle-Calédonie, Nouméa, France
Recommended Citation:
Ruppert J.L.W.,Vigliola L.,Kulbicki M.,et al. Human activities as a driver of spatial variation in the trophic structure of fish communities on Pacific coral reefs[J]. Global Change Biology,2018-01-01,24(1)