Connectivity among wetlands matters for vulnerable amphibian populations in wetlandscapes
| Autor: | Francesco Accatino, Irena F. Creed, Marta Zaffaroni, Carlo De Michele, Patrizia Zamberletti |
|---|---|
| Přispěvatelé: | Department of Civil and Environmental Engineering, Politecnico di Milano [Milan] (POLIMI), Unité de recherche Plantes et Systèmes de Culture Horticoles (PSH), Institut National de la Recherche Agronomique (INRA), Sciences pour l'Action et le Développement : Activités, Produits, Territoires (SADAPT), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, University of Saskatchewan, CNAES 417353-2011 |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
graph theory Population Wetland 010603 evolutionary biology 01 natural sciences Birth rate amphibian model Abundance (ecology) population dynamics Carrying capacity ecological network education Restoration ecology education.field_of_study geography.geographical_feature_category Ecology 010604 marine biology & hydrobiology Ecological Modeling 15. Life on land Ecological network Geography Population model connectivity wetland configuration [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
| Zdroj: | Ecological Modelling Ecological Modelling, Elsevier, 2018, 384, pp.119-127. ⟨10.1016/j.ecolmodel.2018.05.008⟩ |
| ISSN: | 0304-3800 |
| DOI: | 10.1016/j.ecolmodel.2018.05.008 |
| Popis: | International audience; Wetlands have been degraded and destroyed, resulting in the decline of many wetland-dependent species populations. Many conservation efforts are based on protection of individual wetlands; however, fluxes of energy, materials and organisms between wetlands create important structural and functional connections upon which several species depend. We investigated the role of individual wetlands within a wetlandscape in sustaining an amphibian population. Wetlandscapes were represented as networks, where nodes were wetlands and links were flows of organisms described by an amphibian population model. Relationships between a wetland’s connectivity to the other wetlands and the abundance of amphibians under different wetland management strategies were examined. The first finding was that wetlands within a network can be classified into sinks (where local mortality exceeds birth rate), sources (where local birth rate exceeds mortality), and pseudo-sinks (where excessive immigration maintains the population above the carrying capacity). These three wetland classes have low, medium, and high Indegree (a parameter reflecting a wetland’s connectivity), respectively. The second finding was that management interventions in wetlands have different consequences according to the wetland’s Indegree: wetland removal has the worst impact on amphibian populations if the wetland is a source, and wetland restoration has the best impact if the wetland is a pseudo-sink. These findings provide support for policies that managing wetlands not as independent objects but as integral parts of the wetlandscape. |
| Databáze: | OpenAIRE |
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