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Substrate form determines the fate of bryophytes in clear-cuts and buffer strips along small boreal streams
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
2005 (English)In: Ecological Applications, ISSN 1051-0761, Vol. 15, no 2, 674-688 p.Article in journal (Refereed) Published
Abstract [en]

Studies on the effectiveness of forest buffer strips left along streams after logging have long overlooked the biota of the buffers themselves, despite their high species richness. We investigated mosses and liverworts (bryophytes), abundant and species-rich groups in boreal forests, before and 2.5 years after logging along 15 small streams. In each Site, two 1000-m(2) (20 X 50 m) plots along the stream were inventoried; one plot in an area subjected to clear-cutting, and another in a buffer strip (10 m wide on each side of the stream). Ten plots along small streams in forest reserves in the same region were used as references. We found that less than half as many bryophyte species per plot disappeared after logging in the buffer strips compared to the clearcuts. The changes in bryophyte cover and in species composition were smaller in the buffer strips, and the species that were negatively affected in the clearcuts were less affected in the buffer strips. However, there was a significant change in species composition in the buffer strips compared to the references. Substrate form. and taxonomic group were important factors in understanding this turnover. Many species growing on substrates with a convex form (e.g., logs, tree bases, and mesic ground) decreased or disappeared, while species on concave substrates were rather unaffected. This held for both mosses and liverworts, although liverworts were generally more sensitive than mosses. The difference in response of assemblages on convex vs. concave substrates makes changes in microclimate due to logging a likely explanation. The species in most need of protection (i.e., the red-listed species) were among the ones with strongest declines in the 20 m wide buffer strips. In order to function optimally for bryophyte conservation, forests along small streams need to be protected from high wind-throw frequency and strong edge effects. Increasing the width of buffer strips at sites with known or potential values (e.g., large amounts of woody debris or boulders) should be considered a better strategy than using narrow buffer strips with a fixed width.

Place, publisher, year, edition, pages
2005. Vol. 15, no 2, 674-688 p.
Keyword [sv]
skogs, biologisk mångfald, ekologi
National Category
Ecology Biological Sciences
Identifiers
URN: urn:nbn:se:miun:diva-3361DOI: 10.1890/04-0570ISI: 000228059000023Local ID: 3325OAI: oai:DiVA.org:miun-3361DiVA: diva2:28393
Note
VR-BiologyAvailable from: 2008-09-30 Created: 2008-09-30 Last updated: 2011-04-08Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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