DOI: 10.1111/ele.13849
论文题名: Disturbance structures canopy and understory productivity along an environmental gradient
作者: Castorani M.C.N. ; Harrer S.L. ; Miller R.J. ; Reed D.C.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2021
语种: 英语
中文关键词: canopy
; competition
; disturbance
; environmental gradient
; habitat quality
; kelp forest
; long-term experiment
; net primary productivity
; shading
; understory
英文摘要: Disturbances often disproportionately impact different vegetation layers in forests and other vertically stratified ecosystems, shaping community structure and ecosystem function. However, disturbance-driven changes may be mediated by environmental conditions that affect habitat quality and species interactions. In a decade-long field experiment, we tested how kelp forest net primary productivity (NPP) responds to repeated canopy loss along a gradient in grazing and substrate suitability. We discovered that habitat quality can mediate the effects of intensified disturbance on canopy and understory NPP. Experimental annual and quarterly disturbances suppressed total macroalgal NPP, but effects were strongest in high-quality habitats that supported dense kelp canopies that were removed by disturbance. Understory macroalgae partly compensated for canopy NPP losses and this effect magnified with increasing habitat quality. Disturbance-driven increases in understory NPP were still rising after 5–10 years of disturbance, demonstrating the value of long-term experimentation for understanding ecosystem responses to changing disturbance regimes. © 2021 The Authors. Ecology Letters published by John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166790
Appears in Collections: 气候变化与战略
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作者单位: Department of Environmental Sciences, University of Virginia, Charlottesville, VA, United States; Marine Science Institute, University of California, Santa Barbara, CA, United States
Recommended Citation:
Castorani M.C.N.,Harrer S.L.,Miller R.J.,et al. Disturbance structures canopy and understory productivity along an environmental gradient[J]. Ecology Letters,2021-01-01