气候变化领域集成服务门户(CCPortal): Climate change and physical disturbance cause similar community shifts in biological soil crusts

CCPortal

DOI	10.1073/pnas.1509150112
	Climate change and physical disturbance cause similar community shifts in biological soil crusts
	Ferrenberg S.; Reed S.C.; Belnap J.; Schlesinger W.H.
发表日期	2015
ISSN	0027-8424
起始页码	12116
结束页码	12121
卷号	112 期号:39
英文摘要	Biological soil crusts (biocrusts) - communities of mosses, lichens, cyanobacteria, and heterotrophs living at the soil surface - are fundamental components of drylands worldwide, and destruction of biocrusts dramatically alters biogeochemical processes, hydrology, surface energy balance, and vegetation cover. Although there has been long-standing concern over impacts of physical disturbances on biocrusts (e.g., trampling by livestock, damage from vehicles), there is increasing concern over the potential for climate change to alter biocrust community structure. Using long-term data from the Colorado Plateau, we examined the effects of 10 y of experimental warming and altered precipitation (in full-factorial design) on biocrust communities and compared the effects of altered climate with those of long-term physical disturbance (>10 y of replicated human trampling). Surprisingly, altered climate and physical disturbance treatments had similar effects on biocrust community structure. Warming, altered precipitation frequency [an increase of small (1.2 mm) summer rainfall events], and physical disturbance from trampling all promoted early successional community states marked by dramatic declines in moss cover and increases in cyanobacteria cover, with more variable effects on lichens. Although the pace of community change varied significantly among treatments, our results suggest that multiple aspects of climate change will affect biocrusts to the same degree as physical disturbance. This is particularly disconcerting in the context of warming, as temperatures for drylands are projected to increase beyond those imposed as treatments in our study.
英文关键词	Alternate states; Biocrusts; Community structure; Secondary succession; Warming
语种	英语
scopus关键词	rain; Article; biological soil crust; climate change; community dynamics; community structure; cyanobacterium; environmental temperature; greenhouse effect; heterotroph; lichen (organism); moss; nonhuman; precipitation; priority journal; soil; summer; adverse effects; analysis of variance; ecosystem; heterotrophy; human; microbiology; physiology; pollution; statistical model; temperature; Utah; Analysis of Variance; Bryophyta; Climate Change; Cyanobacteria; Ecosystem; Environmental Pollution; Heterotrophic Processes; Humans; Lichens; Models, Statistical; Rain; Soil Microbiology; Temperature; Utah
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159090
作者单位	Ferrenberg, S., Southwest Biological Science Center, US Geological Survey, Moab, UT 84532, United States; Reed, S.C., Southwest Biological Science Center, US Geological Survey, Moab, UT 84532, United States; Belnap, J., Southwest Biological Science Center, US Geological Survey, Moab, UT 84532, United States; Schlesinger, W.H., Cary Institute of Ecosystem Studies, Millbrook, NY, United States
推荐引用方式 GB/T 7714	Ferrenberg S.,Reed S.C.,Belnap J.,et al. Climate change and physical disturbance cause similar community shifts in biological soil crusts[J],2015,112(39).
APA	Ferrenberg S.,Reed S.C.,Belnap J.,&Schlesinger W.H..(2015).Climate change and physical disturbance cause similar community shifts in biological soil crusts.Proceedings of the National Academy of Sciences of the United States of America,112(39).
MLA	Ferrenberg S.,et al."Climate change and physical disturbance cause similar community shifts in biological soil crusts".Proceedings of the National Academy of Sciences of the United States of America 112.39(2015).