Arid
DOI10.1111/j.1461-0248.2004.00706.x
Anthropogenic impacts upon plant species richness and net primary productivity in California
Williams, JW; Seabloom, EW; Slayback, D; Stoms, DM; Viers, JH
通讯作者Williams, JW
来源期刊ECOLOGY LETTERS
ISSN1461-023X
出版年2005
卷号8期号:2页码:127-137
英文摘要

We assess the importance of anthropogenic land-use, altered productivity, and species invasions for observed productivity-richness relationships in California. To this end, we model net primary productivity (NPP) c. 1750 AD and at present (1982-1999) and map native and exotic vascular plant richness for 230 subecoregions. NPP has increased up to 105% in semi-arid areas and decreased up to 48% in coastal urbanized areas. Exotic invasions have increased local species diversity up to 15%. Human activities have reinforced historical gradients in species richness but reduced the spatial heterogeneity of NPP. Structural equation modelling suggests that, prior to European settlement, NPP and richness were primarily controlled by precipitation and other abiotic variables, with NPP mediating richness. Abiotic variables remain the strongest predictors of present NPP and richness, but intermodel comparisons indicate a significant anthropogenic impact upon statewide distributions of NPP and richness. Exotic and native species each positively correlate to NPP after controlling for other variables, which may help explain recent reports of positively associated native and exotic richness.


英文关键词California human impacts land cover change net primary productivity species richness structural equation models
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000226491200001
WOS关键词UNITED-STATES ; LATITUDINAL GRADIENTS ; BIOLOGICAL INVASIONS ; DATA SET ; DIVERSITY ; PATTERNS ; CLIMATE ; ENERGY ; SCALE ; TERRESTRIAL
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
来源机构University of California, Davis
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/148875
作者单位(1)Natl Ctr Ecol Anal & Synth, Santa Barbara, CA 93101 USA;(2)Univ Wisconsin, Dept Geog, Madison, WI 53706 USA;(3)Oregon State Univ, Dept Zool, Corvallis, OR 97331 USA;(4)NASA, Goddard Space Flight Ctr, Sci Syst & Applicat Inc, Biospher Sci Branch, Greenbelt, MD 20771 USA;(5)Univ Calif Santa Barbara, Inst Computat Earth Syst Sci, Santa Barbara, CA 93106 USA;(6)Univ Calif Davis, Dept Environm Sci & Policy, Informat Ctr Environm, Davis, CA 95616 USA;(7)Univ Calif Davis, John Muir Inst Environm, Davis, CA 95616 USA
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Williams, JW,Seabloom, EW,Slayback, D,et al. Anthropogenic impacts upon plant species richness and net primary productivity in California[J]. University of California, Davis,2005,8(2):127-137.
APA Williams, JW,Seabloom, EW,Slayback, D,Stoms, DM,&Viers, JH.(2005).Anthropogenic impacts upon plant species richness and net primary productivity in California.ECOLOGY LETTERS,8(2),127-137.
MLA Williams, JW,et al."Anthropogenic impacts upon plant species richness and net primary productivity in California".ECOLOGY LETTERS 8.2(2005):127-137.
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