Abstract

In the future, a significant proportion of Northern forests may become intensively managed through the planting of monospecific stands of native or introduced trees, and the use of multiple silvicultural treatments such as forest fertilization. Such an intensification of management in selected parts of the landscape is suggested by different zoning models, for example the Triad approach, which is under evaluation in some regions of North America. In this study, based on Fennoscandian conditions, we predicted landscape-scale extinction risks of five hypothetical model insect species dependent on fresh dead wood from Norway spruce (Picea abies), by simulating colonizations and local extinctions in forest stands. Intensified forestry applied to 50% of the spruce stands led to strongly increased extinction risks of all species during the following 150 years. For one species-the sun-exposure specialist-there were strong effects already after 50 years. The negative effects of intensive plantation forestry could be compensated for by taking greater biodiversity conservation measures in other managed forests or by setting aside more forests. This is consistent with the Triad model, which is according to our analyzes an effective way to decrease extinction risks, especially for the short-dispersing species and the species associated with closed forest. A zoning of forest land into intensive forestry, conventional forestry, and set asides may be better at combining increased timber production and maintenance of biodiversity in comparison to landscapes where all production forests are managed in the same way.

Keywords

CWD; Functional zoning; Metapopulation; Plantation forestry; Population viability analysis; Saproxylic insects; Triad

Published in

Biodiversity and Conservation
2011, Volume: 20, number: 13, pages: 2867-2882
Publisher: SPRINGER

SLU Authors

• Ranius, Thomas

  • Department of Ecology, Swedish University of Agricultural Sciences
    

• Roberge, Jean-Michel

  • Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences
    

Associated SLU-program

Forest
Biodiversity
SLU Future Forests


Sustainable Development Goals

Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss


UKÄ Subject classification

Environmental Sciences related to Agriculture and Land-use
Forest Science
Landscape Architecture


Publication identifier

DOI: https://doi.org/10.1007/s10531-011-0143-8

Permanent link to this page (URI)

https://res.slu.se/id/publ/46073