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| Titel |
The role of plant functional trade-offs for biodiversity changes and biome shifts under scenarios of global climatic change |
| VerfasserIn |
B. Reu, S. Zaehle, R. Proulx, K. Bohn, A. Kleidon, R. Pavlick, S. Schmidtlein |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 5 ; Nr. 8, no. 5 (2011-05-24), S.1255-1266 |
| Datensatznummer |
250005820
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| Publikation (Nr.) |
 copernicus.org/bg-8-1255-2011.pdf |
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| Zusammenfassung |
The global geographic distribution of biodiversity and biomes is determined
by species-specific physiological tolerances to climatic constraints. Current
vegetation models employ empirical bioclimatic relationships to predict
present-day vegetation patterns and to forecast biodiversity changes and
biome shifts under climatic change. In this paper, we consider trade-offs in
plant functioning and their responses under climatic changes to forecast and
explain changes in plant functional richness and shifts in biome geographic
distributions.
The Jena Diversity model (JeDi) simulates plant survival according to
essential plant functional trade-offs, including ecophysiological processes
such as water uptake, photosynthesis, allocation, reproduction and phenology.
We use JeDi to quantify changes in plant functional richness and biome shifts
between present-day and a range of possible future climates from two SRES
emission scenarios (A2 and B1) and seven global climate models using metrics
of plant functional richness and functional identity.
Our results show (i) a significant loss of plant functional richness in the
tropics, (ii) an increase in plant functional richness at mid and high
latitudes, and (iii) a pole-ward shift of biomes. While these results are
consistent with the findings of empirical approaches, we are able to explain
them in terms of the plant functional trade-offs involved in the allocation,
metabolic and reproduction strategies of plants.
We conclude that general aspects of plant physiological tolerances can be
derived from functional trade-offs, which may provide a useful process- and
trait-based alternative to bioclimatic relationships. Such a mechanistic
approach may be particularly relevant when addressing vegetation responses to
climatic changes that encounter novel combinations of climate parameters that
do not exist under contemporary climate. |
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