Kuijper, D.P.J., Jedrzejewska, B., Brzeziecki, B., Churski, M., Jedrzejewski, W. & Żybura, H. (2010): Fluctuating ungulate density shapes tree recruitment in natural stands of the Białowieża Primeval Forest, Poland. Journal of Veg. Science 21: 1082-1098.

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Teljes hivatkozás: 
Kuijper, D.P.J., Jedrzejewska, B., Brzeziecki, B., Churski, M., Jedrzejewski, W. & Żybura, H. (2010): Fluctuating ungulate density shapes tree recruitment in natural stands of the Białowieża Primeval Forest, Poland. Journal of Veg. Science 21: 1082-1098.
Rövid hivatkozás: 
Kuijper et al. (2010)
Első szerző: 
Kuijper, Dries P. J.
Év: 
2010
Összefoglalás: 

Fluctuating ungulate density shapes tree recruitment in natural stands of the Białowieża Primeval Forest, Poland
Dries P. J. Kuijper, Bogumiła Jedrzejewska, Bogdan Brzeziecki, Marcin Churski, Włodzimierz Jedrzejewski & Henryk Żybura

Abstract:
Question: What are the main driving factors in 70 years of natural dynamics in tree recruitment in the Białowieża National Park?
Location: Białowieża National Park, Poland, is one of the least disturbed temperate, lowland forest systems in Europe.
Methods: We tested whether fluctuations in large herbivore populations, changes in climate and openness of the forest explained compositional dynamics. Tree recruitment (to size class DBH>5 cm) was measured on permanent transects (in total, 14.9 ha) six times between 1936-2002. These data were related to existing data on ungulate density, climatic parameters and estimates of forest openness collected during the same period.
Results: Total recruitment of all tree species combined was negatively correlated with total ungulate density and red deer density. The variation in response between species was related to the preferences of herbivores; the more preferred forage species (especially Carpinus betulus) were positively and the less preferred species negatively related to herbivore density. Total tree recruitment rates were not related to climatic parameters and openness of the forest. Only Alnus glutinosa recruitment was significantly related to climatic parameters, and Ulmus glabra related to forest openness, but there were no predictable patterns in recruitment among species in relation to these factors.
Conclusions: The present study indicated that changes in large herbivore density have played an important role in driving patterns in tree recruitment and species composition during the last 70 years in Białowieża National Park. In contrast to other studies, increasing herbivore numbers were associated with higher recruitment of preferred and browsing-tolerant species. Periodical crashes in ungulate numbers, whether human-induced or caused by natural factors, may offer windows of opportunity for regeneration of a range of tree species and facilitate more diverse and dynamic forest development.

Megjegyzések: 

Fluctuating ungulate density shapes tree recruitment in natural stands of the Białowieża Primeval Forest, Poland
Dries P. J. Kuijper, Bogumiła Jedrzejewska, Bogdan Brzeziecki, Marcin Churski, Włodzimierz Jedrzejewski & Henryk Żybura

Tartalom:
Introduction
Methods
Description of study site
Measuring recruitment of trees
Long-term changes in ungulate populations
Selection of tree species by browsing ungulates
Meteorological data and tree species response to climate
Statistical analyses and hypotheses testing
Results
Patterns of tree recruitment rate
Tree recruitment rates in relation to ungulate density, climate and forest openness
Tree recruitment rates in relation to ranking of species
Discussion
Herbivory as a driving factor
Positive feedback of ungulate browsing?
Climate changes and forest openness had less influence on tree recruitment
Other possible driving factors
Conclusion
Acknowledgements
References
Supporting information

Browsing impact; European bison; Red deer; Roe deer; Temperate deciduous forest; Topdown effects; mouse

Kiadó: 
International Association for Vegetation Science
Folyóirat: 
Journal of Vegetation Science
Lelőhely: 
ER Archívum (2010/P-013)
Típus: 
tudományos publikáció, konferencia szakcikk (teljes)
Katalógusba vette: 
Gulyás Györgyi
Katalógusbavétel időpontja: 
2010-11-19