Co-ordinating Editor: L. Fraser
Nestedness, SLOSS and conservation networks of boreal herb-rich forests
Article first published online: 24 APR 2009
© 2009 International Association for Vegetation Science
Applied Vegetation Science
Volume 12, Issue 3, pages 295–303, August 2009
How to Cite
Hokkanen, P. J., Kouki, J. and Komonen, A. (2009), Nestedness, SLOSS and conservation networks of boreal herb-rich forests. Applied Vegetation Science, 12: 295–303. doi: 10.1111/j.1654-109X.2009.01031.x
- Issue published online: 6 JUL 2009
- Article first published online: 24 APR 2009
- Received 3 March 2008; Accepted 10 November 2008.
- Edaphically demanding species;
- Forest site type;
- Habitat patch;
- Red-listed species;
- Species-area relationship;
- Vascular flora
Question: Herb-rich patches are biodiversity hotspots for vascular plants in boreal forests. We ask: Do species occurrences on herb-rich patches show a non-random, nested structure?; Does patch size relate to richness of edaphically demanding and red-listed species?; Does a set of small patches support more edaphically demanding and red-listed species than a few large patches of the equal area?
Location: Eastern Finland (63°04′N, 29°52′E), boreal vegetation zone.
Data: Vegetation mapping of 90 herb-rich sites, varying from 0.05 to 6.93 ha in size and belonging to six different, predetermined forest site types.
Results: Using the RANDNEST procedure, only one site type showed a significantly nested pattern, and patch area was not related to “nestedness” in any of the site types. The number of edaphically demanding and red-listed plant species was positively correlated with a patch size in three forest site types. In all site types, a set of small patches had more edaphically demanding and red-listed species than did a few large patches of the equal total area.
Conclusions: For conservation, it is essential to protect representative sets of different herb-rich forest site types because flora varies between the site types. Within herb-rich forest site types, several small areas may support representative species composition. However, successful conservation requires thorough species inventories, because of the high level of heterogeneity between the herb-rich patches.