How is metapopulation resilience affected by longitudinal connectivity? A criterion for the restoration of river networks

Alonso González, Carlos and Garcia De Jalon Lastra, Diego and Roa, Juan (2015). How is metapopulation resilience affected by longitudinal connectivity? A criterion for the restoration of river networks. In: "International Conference on River and StreamRestoration. Novel Approaches to Assess and Rehabilitate Modified Rivers.", 30 Jun - 2 Jul 2015, Wageningen, Países Bajos. p. 86.

Description

Title: How is metapopulation resilience affected by longitudinal connectivity? A criterion for the restoration of river networks
Author/s:
  • Alonso González, Carlos
  • Garcia De Jalon Lastra, Diego
  • Roa, Juan
Item Type: Presentation at Congress or Conference (Article)
Event Title: International Conference on River and StreamRestoration. Novel Approaches to Assess and Rehabilitate Modified Rivers.
Event Dates: 30 Jun - 2 Jul 2015
Event Location: Wageningen, Países Bajos
Title of Book: Novel Approaches to Assess and Rehabilitate Modified Rivers
Date: 2015
Subjects:
Faculty: E.T.S.I. Montes (UPM)
Department: Sistemas y Recursos Naturales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

Funding Projects

TypeCodeAcronymLeaderTitle
FP7282656REFORMUnspecifiedUnspecified

More information

Item ID: 42249
DC Identifier: http://oa.upm.es/42249/
OAI Identifier: oai:oa.upm.es:42249
Official URL: http://www.reformrivers.eu/home
Deposited by: Memoria Investigacion
Deposited on: 08 Jul 2016 14:31
Last Modified: 08 Jul 2016 14:31
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