Environmental variables, not Allee effects, drive patch vigor in exotic Phragmites australis stands invading the Saco River Estuary, Maine, USA
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- 作者：Michelle A. Slatera ; seachelle2189@gmail.com" class="auth_mail" title="E-mail the corresponding author ; Pamela A. Morganb ; pmorgan@une.edu" class="auth_mail" title="E-mail the corresponding author ; Charles E. Tilburga ; ctilburg@une.edu" class="auth_mail" title="E-mail the corresponding author ; Steven E. Travisc ; stravis@une.edu" class="auth_mail" title="E-mail the corresponding author
- 关键词：Genotypic richness ; Hydrodynamics ; Invasive species ; Propagule dispersal ; Seed viability ; Shoreline development ; Nitrogen
- 刊名：Aquatic Botany
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：136
- 期：Complete
- 页码：220-229
- 全文大小：779 K
文摘
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We found no Allee effect in invasive Phragmites australis in a small river system in New England.
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Patch vigor (expansion rate, stem density, stem height) and genotypic richness was not related.
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Patch vigor was fostered by increasing distance from the river mouth and elevated nitrogen.
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Propagules were transported primarily downstream, but were often caught up in tidal creeks.
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Genotypic richness was fostered by low-level human development and barren substrate.