Journal
EVOLUTIONARY APPLICATIONS
Volume 5, Issue 2, Pages 117-129Publisher
WILEY
DOI: 10.1111/j.1752-4571.2011.00214.x
Keywords
anthropogenic stress; changing environments; cost of inbreeding; genetic drift; genetic variation; habitat fragmentation; inbreeding depression; population persistence
Categories
Funding
- Netherlands Organisation for Scientific Research (NWO)
- Earth and Life Sciences (ALW) [805.33.362P]
- Science for Global Development (WOTRO) [CPG-NWO-895.100.013]
- Aarhus Stress Network
Ask authors/readers for more resources
Biodiversity is increasingly subjected to human-induced changes of the environment. To persist, populations continually have to adapt to these often stressful changes including pollution and climate change. Genetic erosion in small populations, owing to fragmentation of natural habitats, is expected to obstruct such adaptive responses: (i) genetic drift will cause a decrease in the level of adaptive genetic variation, thereby limiting evolutionary responses; (ii) inbreeding and the concomitant inbreeding depression will reduce individual fitness and, consequently, the tolerance of populations to environmental stress. Importantly, inbreeding generally increases the sensitivity of a population to stress, thereby increasing the amount of inbreeding depression. As adaptation to stress is most often accompanied by increased mortality (cost of selection), the increase in the cost of inbreeding under stress is expected to severely hamper evolutionary adaptive processes. Inbreeding thus plays a pivotal role in this process and is expected to limit the probability of genetically eroded populations to successfully adapt to stressful environmental conditions. Consequently, the dynamics of small fragmented populations may differ considerably from large nonfragmented populations. The resilience of fragmented populations to changing and deteriorating environments is expected to be greatly decreased. Alleviating inbreeding depression, therefore, is crucial to ensure population persistence.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available