Slope aspect modifies community responses to clear-cutting in boreal forests.

Slope aspect modifies community responses to clear-cutting in boreal forests. Research Abstract Details 

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Slope aspect modifies community responses to clear-cutting in boreal forests. Abstract Text:

Marcus ,Mats Dynesius,Kristoffer Hylander,Christer Nilsson,

Slope aspect modifies microclimate and influences ecological processes and spatial distribution of species across forest landscapes, but the impact of slope aspect on community responses to disturbance is poorly understood. Such insight is necessary to understand landscape community dynamics and resilience. We compared bryophyte (liverworts and mosses) communities in matched 0.02-ha plots of four boreal stand types in central Sweden: recently clear-felled and mature stands dominated by Norway spruce in south-facing and north-facing slopes. Differences between forests and clear-cuts were interpreted as effects of clear-cutting, and differences between south- and north-facing slopes as effects of aspect. In response to clear-cutting, bryophyte cover and composition changed more in south-facing slopes. Only one out of ten significantly declining species in south-facing slopes also declined significantly in north-facing slopes. North-facing slopes lost fewer bryophyte species, and among those, fewer forest species and fewer species associated with wood and bark. In north-facing slopes, the average proportions of mosses and liverworts shared between the forest and the clear-cut plot were 88% and 74%, respectively. Corresponding numbers for south-facing slopes were 79% and 33%. In addition, more bryophyte species were added in north- than south-facing slopes after clear-cutting, somewhat reducing the difference in compositional change between aspects. South- and north-facing mature forests differed in species composition, mostly due to higher richness of mosses in south-facing slopes. The smaller changes in bryophyte communities on north-facing slopes in response to clear-cutting have implications for ecosystem dynamics and management as high local survival may enhance landscape-level resilience.

Slope aspect modifies community responses to clear-cutting in boreal forests. Publishing Authors By Initials

M ,M Dynesius,K Hylander,C Nilsson,

For similar plants: trees research abstracts see: plants: trees research

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Slope aspect modifies community responses to clear-cutting in boreal forests. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Ecology

VOLUME: 88

Page Numbers: 749-58

Journal Abbreviation: Ecology

ISSN: 0012-9658

DAY: 21

MONTH: Mar

YEAR: 2007

Slope aspect modifies community responses to clear-cutting in boreal forests. Information

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LANGUAGE: eng

NlmUniqueID: 43541

Slope aspect modifies community responses to clear-cutting in boreal forests. Keywords Mesh Terms:

KEYWORDS: Trees

MESH TERMS: growth & development

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Grant and Affiliation Information for Slope aspect modifies community responses to clear-cutting in boreal forests.

AFFILIATION: Landscape Ecology Group, Department of Ecology and Environmental Science, Umeå University, SE-901 87 Umeå, Sweden.

Country: United States

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MEDLINETA: Ecology

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