RT Journal Article
T1 Spatial scales of population synchrony of two competing species: effects of harvesting and strength of competition
A1 Jarillo Díaz, Javier
A1 Sæther, Bernt‐Erik
A1 Engen, Steinar
A1 Cao García, Francisco Javier
AB Theoretical analyses of single‐species models have revealed that the degree of synchrony in fluctuations of geographically separated populations increases with increasing spatial covariation in environmental fluctuations and increased interchange of individuals, but decreases with local strength of density dependence. Here we extend these results to include interspecific competition between two species as well as harvesting. We show that the effects of interspecific competition on the geographical scale of population synchrony are dependent on the pattern of spatial covariation of environmental variables. If the environmental noise is uncorrelated between the competing species, competition generally increases the spatial scale of population synchrony of both species. Otherwise, if the environmental noises are strongly correlated between species, competition generally increases the spatial scale of population synchrony of at least one, but also often of both species. The magnitude of these spatial scaling effects is, however, strongly influenced by the dispersal capacity of the two competing species. If the species are subject to proportional harvesting, this may synchronise population dynamics over large geographical areas, affecting the vulnerability of harvested species to environmental changes. However, the strength of interspecific competition may strongly modify this effect of harvesting on the spatial scale of population synchrony. For example, harvesting of one species may affect the spatial distribution of competing species that are not subject to harvesting. These analytical results provide an important illustration of the importance of applying an ecosystem rather than a single‐species perspective when developing harvest strategies for a sustainable management of exploited species.
SN 0030-1299
SN 1600-0706
YR 2018
FD 2018-06-14
LK https://hdl.handle.net/20.500.14352/100850
UL https://hdl.handle.net/20.500.14352/100850
LA eng
NO Jarillo, J., Sæther, B. E., Engen, S., & Cao, F. J. (2018). Spatial scales of population synchrony of two competing species: effects of harvesting and strength of competition. Oikos, 127(10), 1459-1470.
NO El texto completo de este trabajo no se encuentra disponible por no haber sidofacilitado aún por su autor, por restricciones de copyright, o por no existir unaversión digital
NO European Economic Area (EEA) Grants under the NILS - Science and Sustainability Programme
NO SUSTAIN project of the Research Council of Norway
NO Research Council of Norway
NO Ministerio de Educación, Cultura y Deporte
NO Union Europea
NO Universidad Complutense de Madrid
NO Banco Santander (Spain)
DS Docta Complutense
RD 6 oct 2024