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Potential Impact of Carry-Over Effects in the Dynamics and Management of Seasonal Populations.
- Source :
- PLoS ONE; 5/12/2016, Vol. 11 Issue 5, p1-12, 12p
- Publication Year :
- 2016
-
Abstract
- For many species living in changing environments, processes during one season influence vital rates in a subsequent season in the same annual cycle. The interplay between these carry-over effects between seasons and other density-dependent events can have a strong influence on population size and variability. We carry out a theoretical study of a discrete semelparous population model with an annual cycle divided into a breeding and a non-breeding season; the model assumes carry-over effects coming from the non-breeding period and affecting breeding performance through a density-dependent adjustment of the growth rate parameter. We analyze the influence of carry-over effects on population size, focusing on two important aspects: compensatory mortality and population variability. To understand the potential consequences of carry-over effects for management, we have introduced constant effort harvesting in the model. Our results show that carry-over effects may induce dramatic changes in population stability as harvesting pressure is increased, but these changes strongly depend on whether harvesting occurs prior to reproduction or after it. [ABSTRACT FROM AUTHOR]
- Subjects :
- POPULATION biology
BREEDING
PARAMETERS (Statistics)
CLIMATE change
SPECIES
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 11
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- PLoS ONE
- Publication Type :
- Academic Journal
- Accession number :
- 115293257
- Full Text :
- https://doi.org/10.1371/journal.pone.0155579