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Strong microsite control of seedling recruitment in tundra

Bergen Open Research Archive

Show simple item record Graae, Bente J. eng Ejrnæs, Rasmus eng Lang, Simone I. eng Meineri, Eric eng Ibarra, Pablo T. eng Bruun, Hans Henrik eng 2011-03-11T10:54:56Z 2011-03-11T10:54:56Z 2010-12-19 eng
dc.identifier.citation Oecologia 1-12 en_US
dc.description.abstract The inclusion of environmental variation in studies of recruitment is a prerequisite for realistic predictions of the responses of vegetation to a changing environment. We investigated how seedling recruitment is affected by seed availability and microsite quality along a steep environmental gradient in dry tundra. A survey of natural seed rain and seedling density in vegetation was combined with observations of the establishment of 14 species after sowing into intact or disturbed vegetation. Although seed rain density was closely correlated with natural seedling establishment, the experimental seed addition showed that the microsite environment was even more important. For all species, seedling emergence peaked at the productive end of the gradient, irrespective of the adult niches realized. Disturbance promoted recruitment at all positions along the environmental gradient, not just at high productivity. Early seedling emergence constituted the main temporal bottleneck in recruitment for all species. Surprisingly, winter mortality was highest at what appeared to be the most benign end of the gradient. The results highlight that seedling recruitment patterns are largely determined by the earliest stages in seedling emergence, which again are closely linked to microsite quality. A fuller understanding of microsite effects on recruitment with implications for plant community assembly and vegetation change is provided. en_US
dc.language.iso eng eng
dc.publisher Springer eng
dc.rights Attribution-NonCommercial CC BY-NC eng
dc.rights.uri eng
dc.subject Arctic eng
dc.subject Alpine eng
dc.subject Invasibility eng
dc.subject Microclimate eng
dc.subject Seed limitation eng
dc.title Strong microsite control of seedling recruitment in tundra eng
dc.type Peer reviewed eng
dc.type Journal article eng
dc.subject.nsi VDP::Mathematics and natural science: 400 eng
dc.rights.holder Copyright The Author(s) 2010. This article is published with open access at
dc.rights.holder The Author(s) 2010 eng
dc.type.version publishedVersion eng
bora.peerreviewed Peer reviewed eng
bibo.doi eng

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