Document Detail

Population characteristics predict responses in moose body mass to temporal variation in the environment.
MedLine Citation:
PMID:  16922846     Owner:  NLM     Status:  MEDLINE    
1. A general problem in population ecology is to predict under which conditions stochastic variation in the environment has the stronger effect on ecological processes. By analysing temporal variation in a fitness-related trait, body mass, in 21 Norwegian moose Alces alces (L.) populations, we examined whether the influence of temporal variation in different environmental variables were related to different parameters that were assumed to reflect important characteristics of the fundamental niche space of the moose. 2. Body mass during autumn was positively related to early access to fresh vegetation in spring, and to variables reflecting slow phenological development (low June temperature, a long spring with a slow plant progression during spring). In contrast, variables related to food quantity and winter conditions had only a minor influence on temporal variation in body mass. 3. The magnitude of the effects of environmental variation on body mass was larger in populations with small mean body mass or living at higher densities than in populations with large-sized individuals or living at lower densities. 4. These results indicate that the strongest influence of environmental stochasticity on moose body mass occurs towards the borders of the fundamental niche space, and suggests that populations living under good environmental conditions are partly buffered against fluctuations in environmental conditions.
Ivar Herfindal; Bernt-Erik Saether; Erling Johan Solberg; Reidar Andersen; Kjell Arild Høgda
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of animal ecology     Volume:  75     ISSN:  0021-8790     ISO Abbreviation:  J Anim Ecol     Publication Date:  2006 Sep 
Date Detail:
Created Date:  2006-08-22     Completed Date:  2008-02-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376574     Medline TA:  J Anim Ecol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1110-8     Citation Subset:  IM    
Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway.
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MeSH Terms
Body Size / physiology*
Deer / anatomy & histology*,  physiology*
Growth and Development / physiology
Models, Biological*
Population Density
Time Factors

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