Memorias de investigación
Ponencias en congresos:
How is metapopulation resilience affected by longitudinal connectivity? A criterion for the restoration of river networks
Año:2015
Áreas de investigación
  • Ecología acuática
Datos
Descripción
Climate change is rearranging the limits of geographic distributions of species. The populations inhabiting the latitudinal margins of a species' range are likely to be sensitive to climatic drivers. If these populations are extirpated, a latitudinal shift of the range is produced. When species are spatially structured into metapopulations, these will experiment a negative growth trajectory, and eventually become extirpated, when extinction rate (e) of local populations (demes) exceeds the rate of establishment of new colonies in available empty patches (mp). Dispersal among patches is a process of central significance for the recolonization rate (mp). Therefore, the loss of longitudinal connectivity in river networks is likely to enhance the latitudinal displacement of a species' range in its rear edge, by reducing that rate. Moreover, if climate drifts towards more meridional conditions, the thermal habitat of some species can become constrained, and the extinction rates of local populations increased. This might be the case of salmonid species in southern Europe. In this work the functioning of a salmonid metapopulation has been modeled by means of several coupled logistic population dynamics models with population viability thresholds. It has been parameterized for a very simple real metapopulation of introduced Salvelinus fontinalis in a glacier lakes system in the mountains of Central Spain. The resilience of the metapopulation has been expressed as a function of the connectivity among demes. Thus, the metapopulation resilience is proposed as a new criterion to assess the efficiency of the restoration of the longitudinal connectivity within a river network.
Internacional
Si
Nombre congreso
REFORM International Conference on River and Stream Restoration ?Novel Approaches to Assess and Rehabilitate Modified Rivers?
Tipo de participación
970
Lugar del congreso
Wageningen, Países Bajos
Revisores
Si
ISBN o ISSN
00-0000-000-0
DOI
Fecha inicio congreso
30/06/2015
Fecha fin congreso
02/07/2015
Desde la página
86
Hasta la página
86
Título de las actas
Proceedings of the International Conference on River and Stream Restoration ?Novel Approaches to Assess and Rehabilitate Modified Rivers?
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Hidrobiología
  • Departamento: Sistemas y Recursos Naturales