Strong microsite control of seedling recruitment in tundra.

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 realiz

SUBMITTER: Graae BJ 

PROVIDER: S-EPMC3094527 | biostudies-literature | 2011 Jun

REPOSITORIES: biostudies-literature