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Quantifying habitat requirements of tree-living species in fragmented boreal forests with Bayesian methods
Dept of Ecology, SLU Uppsala.
Dept of Mathematics and Statistics, Helsinki University.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (Skoglig Mångfald)
2009 (English)In: Conservation Biology, ISSN 0888-8892, E-ISSN 1523-1739, Vol. 23, no 5, 1127-1137 p.Article in journal (Refereed) Published
Abstract [en]

Quantitative conservation objectives require detailed consideration of the habitat requirements of target species. Tree-living bryophytes, lichens, and fungi are a critical and declining biodiversity component of boreal forests. To understand their requirements, Bayesian methods were used to analyze the relationships between the occurrence of individual species and habitat factors at the tree and the stand scale in a naturally fragmented boreal forest landscape. The importance of unexplained between-stand variation in occurrence of species was estimated, and the ability of derived models to predict species' occurrence was tested. The occurrence of species was affected by quality of individual trees. Furthermore, the relationships between occurrence of species at the tree level and size and shape of stands indicated edge effects, implying that some species were restricted to interior habitats of large, regular stands. Yet for the habitat factors studied, requirements of many species appeared similar. Species occurrence also varied between stands; most of the seemingly suitable trees in some stands were unoccupied. The models captured most variation in species occurrence at tree level. They also successfully accounted for between-stand variation in species occurrence, thus providing realistic simulations of stand-level occupancy of species. Important unexplained between-stand variation in species occurrence warns against a simplified view that only local habitat factors influence species' occurrence. Apparently, similar stands will host populations of different sizes due to historical, spatial, and stochastic factors. Thus, habitat suitability cannot be assessed simply by population sizes, and stands lacking a species may still provide suitable habitat and merit protection.

 

Place, publisher, year, edition, pages
2009. Vol. 23, no 5, 1127-1137 p.
Keyword [en]
WOOD-DECAYING FUNGI; PICEA-ABIES FOREST; SPATIAL-PATTERN; COLONIZATION; LOGS; METAPOPULATION; AVAILABILITY; DYNAMICS; ECOLOGY; PLANT
National Category
Ecology
Identifiers
URN: urn:nbn:se:miun:diva-7921DOI: 10.1111/j.1523-1739.2009.01209.xISI: 000269802200015Scopus ID: 2-s2.0-70349211783OAI: oai:DiVA.org:miun-7921DiVA: diva2:132871
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Skogen som resurs
Available from: 2009-01-05 Created: 2009-01-05 Last updated: 2016-09-26Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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