DOI: 10.1111/gcb.14941
论文题名: Human exploitation shapes productivity–biomass relationships on coral reefs
作者: Morais R.A. ; Connolly S.R. ; Bellwood D.R.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2020
卷: 26, 期: 3 语种: 英语
英文关键词: buffering productivity
; coral reef fisheries
; Coral Triangle
; ecosystem functioning
; fish productivity
; Great Barrier Reef
; overexploitation
; overfishing
; size-spectrum theory
; standing biomass
Scopus关键词: biomass
; climate effect
; coral reef
; ecosystem management
; ecosystem response
; exploitation
; global change
; primary production
; Australia
; Coral Sea
; Great Barrier Reef
; Queensland
; Anthozoa
英文摘要: Coral reef fisheries support the livelihoods of millions of people in tropical countries, despite large-scale depletion of fish biomass. While human adaptability can help to explain the resistance of fisheries to biomass depletion, compensatory ecological mechanisms may also be involved. If this is the case, high productivity should coexist with low biomass under relatively high exploitation. Here we integrate large spatial scale empirical data analysis and a theory-driven modelling approach to unveil the effects of human exploitation on reef fish productivity–biomass relationships. We show that differences in how productivity and biomass respond to overexploitation can decouple their relationship. As size-selective exploitation depletes fish biomass, it triggers increased production per unit biomass, averting immediate productivity collapse in both the modelling and the empirical systems. This ‘buffering productivity’ exposes the danger of assuming resource production–biomass equivalence, but may help to explain why some biomass-depleted fish assemblages still provide ecosystem goods under continued global fishing exploitation. © 2019 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158908
Appears in Collections: 气候变化与战略
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作者单位: College of Science and Engineering and ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Qld, Australia
Recommended Citation:
Morais R.A.,Connolly S.R.,Bellwood D.R.. Human exploitation shapes productivity–biomass relationships on coral reefs[J]. Global Change Biology,2020-01-01,26(3)