气候变化领域集成服务门户(CCPortal): Disturbance structures canopy and understory productivity along an environmental gradient

CCPortal

DOI	10.1111/ele.13849
	Disturbance structures canopy and understory productivity along an environmental gradient
	Castorani M.C.N.; Harrer S.L.; Miller R.J.; Reed D.C.
发表日期	2021
ISSN	1461023X
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.
关键词	canopy competition disturbance environmental gradient habitat quality kelp forest long-term experiment net primary productivity shading understory
语种	英语
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/204349
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
推荐引用方式 GB/T 7714	Castorani M.C.N.,Harrer S.L.,Miller R.J.,et al. Disturbance structures canopy and understory productivity along an environmental gradient[J],2021.
APA	Castorani M.C.N.,Harrer S.L.,Miller R.J.,&Reed D.C..(2021).Disturbance structures canopy and understory productivity along an environmental gradient.Ecology Letters.
MLA	Castorani M.C.N.,et al."Disturbance structures canopy and understory productivity along an environmental gradient".Ecology Letters (2021).