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- Title
Nitrogen balance in forest soils: nutritional limitation of plants under climate change stresses.
- Authors
Rennenberg, H.; Dannenmann, M.; Gessler, A.; Kreuzwieser, J.; Simon, J.; Papen, H.
- Abstract
Forest ecosystems with low soil nitrogen (N) availability are characterized by direct competition for this growth-limiting resource between several players, i.e. various components of vegetation, such as old-growth trees, natural regeneration and understorey species, mycorrhizal fungi, free-living fungi and bacteria. With the increase in frequency and intensity of extreme climate events predicted in current climate change scenarios, also competition for N between plants and/or soil microorganisms will be affected. In this review, we summarize the present understanding of ecosystem N cycling in N-limited forests and its interaction with extreme climate events, such as heat, drought and flooding. More specifically, the impacts of environmental stresses on microbial release and consumption of bioavailable N, N uptake and competition between plants, as well as plant and microbial uptake are presented. Furthermore, the consequences of drying–wetting cycles on N cycling are discussed. Additionally, we highlight the current methodological difficulties that limit present understanding of N cycling in forest ecosystems and the need for interdisciplinary studies.
- Subjects
BIODEGRADATION; DROUGHTS; FLOODS; HEAT; NITRIFICATION; FOREST restoration; NITROGEN
- Publication
Plant Biology, 2009, Vol 11, p4
- ISSN
1435-8603
- Publication type
Article
- DOI
10.1111/j.1438-8677.2009.00241.x