Colonization in metapopulations: a review of theory and observations
作者:
TORBJÖRN EBENHARD,
期刊:
Biological Journal of the Linnean Society
(WILEY Available online 1991)
卷期:
Volume 42,
issue 1‐2
页码: 105-121
ISSN:0024-4066
年代: 1991
DOI:10.1111/j.1095-8312.1991.tb00554.x
出版商: Blackwell Publishing Ltd
关键词: Metapopulation;colonization;extinction models;propagule;demographic stochasticity;habitat fragmentation;patchy habitats
数据来源: WILEY
摘要:
In metapopulation dynamics turnover of populations in isolated patches may be frequent. Regional survival of a species in such a system with frequent extinctions hinges on its colonization ability. Colonization is more than just dispersal; when a propagule reaches a new patch it faces higher extinction probabilities than does an established population. Extinction models as well as empirical data suggest that a large propagule with a potential for rapid increase in a varying environment,orwith a low mortality rate in an environment perceived as constant, has a higher probability of successful colonization. Large variation in population size when it is still small increases the risk of failure. Factors introducing such variation are demographic stochasticity and environmental variation. It is hard to single out demographic traits that ensure good colonizing ability, since colonization can be achieved in many different ways, but generalists and species with self‐fertilization seem to be superio
点击下载:
PDF
(1170KB)
返 回