DOI: 10.1111/ele.13508
论文题名: How pulse disturbances shape size-abundance pyramids
作者: Jacquet C. ; Gounand I. ; Altermatt F.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2020
卷: 23, 期: 6 起始页码: 1014
结束页码: 1023
语种: 英语
中文关键词: Body-size
; community size structure
; disturbance frequency
; disturbance intensity
; extreme events
; metabolic theory
; perturbations
; protist communities
; size spectrum
英文关键词: Protista
; biomass
; body size
; ecosystem
; food chain
; Biomass
; Body Size
; Ecosystem
; Food Chain
英文摘要: Ecological pyramids represent the distribution of abundance and biomass of living organisms across body-sizes. Our understanding of their expected shape relies on the assumption of invariant steady-state conditions. However, most of the world’s ecosystems experience disturbances that keep them far from such a steady state. Here, using the allometric scaling between population growth rate and body-size, we predict the response of size-abundance pyramids within a trophic guild to any combination of disturbance frequency and intensity affecting all species in a similar way. We show that disturbances narrow the base of size-abundance pyramids, lower their height and decrease total community biomass in a nonlinear way. An experimental test using microbial communities demonstrates that the model captures well the effect of disturbances on empirical pyramids. Overall, we demonstrate both theoretically and experimentally how disturbances that are not size-selective can nonetheless have disproportionate impacts on large species. © 2020 John Wiley & Sons Ltd/CNRS Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166643
Appears in Collections: 气候变化与战略
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作者单位: Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zürich, Switzerland; Department of Aquatic Ecology, Swiss Federal Institute of Aquatic Science and Technology, Eawag, Dübendorf, Switzerland; Sorbonne Université, CNRS, UPEC, CNRS, IRD, INRA, Institut d’écologie et des sciences de l’environnement, IEES, Paris, France
Recommended Citation:
Jacquet C.,Gounand I.,Altermatt F.. How pulse disturbances shape size-abundance pyramids[J]. Ecology Letters,2020-01-01,23(6)