Arid
DOI10.1111/1365-2745.12360
Erosion of beta diversity under interacting global change impacts in a semi-arid grassland
Eskelinen, Anu1,2; Harrison, Susan1
通讯作者Eskelinen, Anu
来源期刊JOURNAL OF ECOLOGY
ISSN0022-0477
EISSN1365-2745
出版年2015
卷号103期号:2页码:397-407
英文摘要

Human impacts are often thought of as homogenizing natural communities, but it is unclear how these impacts interact to alter the beta diversity (spatial variability) of plant communities. In a grassland with high beta diversity along a soil fertility gradient, we asked which combinations of nutrient enrichment, precipitation enhancement and disturbance would homogenize communities along the gradient by allowing dominant species from one part of the gradient to increase their abundances in other parts of the gradient. In particular, joint addition of nutrients and water might especially benefit resource-acquisitive and/or exotic species, which have been observed to compete well in resource-rich conditions; this would tend to reduce variation in species composition across the gradient. To alleviate dispersal limitation as a constraint on treatment responses, we added seeds of 15 species abundant in different parts of the soil fertility gradient to our 132 plots. Fertilization and water addition allowed species from fertile soils to increase their abundance in infertile soils, an effect that strengthened with time. Disturbance permitted species from infertile soils to increase in abundance in infertile soils, but only transiently. Plant height, specific leaf area and exotic status best predicted the abilities of species to attain greater cover in harsh habitats under ameliorated conditions. Among-habitat beta diversity of seeded species was reduced by the interactive effect of fertilization and watering, although not by watering alone.Synthesis. Our findings are a novel demonstration of how interacting global change factors reduce beta diversity by eroding the biotic and abiotic resistances that control community structure along soil fertility gradients.


英文关键词abiotic resistance annual grassland biotic resistance climate change community-weighted mean traits exotic species precipitation change productivity gradient resource limitation seed addition
类型Article
语种英语
国家USA ; Finland
收录类别SCI-E
WOS记录号WOS:000350549000011
WOS关键词COMMUNITY STRUCTURE ; PLANT BIODIVERSITY ; CLIMATE-CHANGE ; ECONOMICS SPECTRUM ; RESOURCE USE ; RESPONSES ; CALIFORNIA ; INVASION ; LIMITATION ; COMPETITION
WOS类目Plant Sciences ; Ecology
WOS研究方向Plant Sciences ; 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/2XILL650/188532
作者单位1.Univ Calif Davis, Dept Environm Sci & Policy, Davis, CA 95616 USA;
2.Univ Oulu, Dept Biol, FI-90014 Oulu, Finland
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GB/T 7714
Eskelinen, Anu,Harrison, Susan. Erosion of beta diversity under interacting global change impacts in a semi-arid grassland[J]. University of California, Davis,2015,103(2):397-407.
APA Eskelinen, Anu,&Harrison, Susan.(2015).Erosion of beta diversity under interacting global change impacts in a semi-arid grassland.JOURNAL OF ECOLOGY,103(2),397-407.
MLA Eskelinen, Anu,et al."Erosion of beta diversity under interacting global change impacts in a semi-arid grassland".JOURNAL OF ECOLOGY 103.2(2015):397-407.
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