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Temporal variation of wood-fungi diversity in boreal old-growth forests: Implications for monitoring
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap.
Dept of Ecology and Environmental Science, Umeå University.
Dept of Ecology and Environmental Science, Umeå University.
2005 (Engelska)Ingår i: Ecological Applications, ISSN 1051-0761, E-ISSN 1939-5582, Vol. 15, nr 3, s. 970-982Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Monitoring programs that supply reliable and sufficient information on numbers and types of organisms are essential for following changes in biodiversity. In boreal Fennoscandia, forest-dwelling species are threatened in managed forest landscapes and, thus, are of particular concern for conservation strategies. Wood fungi represent key ecological components in the boreal forest that are sensitive to forestry and widely used as indicators in large-scale forest inventories for identifying valuable forest habitats. Knowledge of their natural dynamics is required for designing monitoring programs to assess the adequacy of conservation strategies. We studied the occurrence of corticoids (Corticiaceae) and polypores (Polyporaceae) over time at different spatial scales in unexploited boreal old-growth forests. Data from 70 downed logs followed during an eight-year period showed that the lifespan of fruit bodies of most species was shorter than four years. Even perennial species followed this pattern, although fruit bodies of some species (e.g., Phellinus spp.) remained vital throughout the eight years studied. Both species richness and species composition on individual logs changed markedly over the eight years due to deterministic succession of species paralleling the wood decay. By contrast, data from the stand scale, i.e., seven 0.1-ha plots, showed that species richness and species composition of polypores did not undergo any major changes during a six-year period. A majority of all recorded polypore species (80%) were already present at the first inventory. However, although species richness remained constant at the stand scale, corticoid species composition differed between years, reflecting their short-lived, annual fruit bodies. This study suggests that monitoring should be performed at stand scale and focus on species with durable fruit bodies, e.g., polypores. This will provide data that can be used both to detect future changes in biodiversity in old-growth spruce forests and to evaluate conservation strategies.

Ort, förlag, år, upplaga, sidor
2005. Vol. 15, nr 3, s. 970-982
Nyckelord [sv]
biologisk mångfald, skog
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
URN: urn:nbn:se:miun:diva-8387DOI: 10.1890/04-0628ISI: 000229723400015OAI: oai:DiVA.org:miun-8387DiVA, id: diva2:134480
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VR-BiologyTillgänglig från: 2009-01-21 Skapad: 2009-01-21 Senast uppdaterad: 2017-12-14Bibliografiskt granskad

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Berglund, HåkanEdman, Mattias

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