期刊
ARCTIC ANTARCTIC AND ALPINE RESEARCH
卷 42, 期 4, 页码 406-411出版社
INST ARCTIC ALPINE RES
DOI: 10.1657/1938-4246-42.4.406
关键词
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资金
- Arctic Institute of North America
- NSF Graduate Research Fellowship
- NSF [DEB 0516509]
Rapid climate change in arctic environments is leading to a widespread expansion in woody deciduous shrub populations However, little is known about the reproductive, dispersal, and establishment mechanisms associated with shrub expansion It is assumed that harsh environmental conditions impose limitations on plant sexual reproduction in the Arctic such that population survival and expansion is predominately a function of clonal recruitment We present contrary evidence from microsatellite genetic data suggesting the prevalence of recruitment by seed Further, we present a conceptual model describing modes of recruitment in relation to the abiotic environment Climate change may be alleviating abiotic stress so that resources are available for more frequent recruitment by seed Such changes have widespread implications for ecosystem structure and functioning, including species composition, wildlife habitat, biogeochemical cycling, and surface energy balance
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