Un modelo para evaluar la fragmentación de hábitats causada por nuevas infraestructuras en territorios extensivos - Evaluación del impacto del plan estratégico español de infraestructuras y transportes.

The aim of the present work is to design a model for evaluating the impact of planned infrastructures on species survival at the territorial scale by calculating a connectivity index. The method developed involves determining the effective distance of displacement between patches of the same habitat, simplifying earlier models so that there is no dependence on specific variables for each species. A case study is presented in which the model was used to assess the impact of the forthcoming roads and railways included in the Spanish Strategic Infrastructure and Transport Plan (PEIT, in its Spanish initials). This study took into account the habitats of peninsular Spain, which occupies an area of some 500,000 km2. In this territory, the areas deemed to provide natural habitats are defined by Directive 92/43/EEC. The impact of new infrastructures on connectivity was assessed by comparing two scenarios, with and without the plan, for the major new road and railway networks. The calculation of the connectivity index (CI) requires the use of a raster methodology based on the Arc/Info geographical information system (GIS). The actual calculation was performed using a program written in Arc/Info Macro Language (AML); this program is available in FragtULs (Mancebo Quintana, 2007), a set of tools for calculating indicators of fragmentation caused by transport infrastructure (http://topografia.montes.upm.es/fragtuls.html). The indicator of connectivity proposed allows the estimation of the connectivity between all the patches of a territory, with no artificial (non-ecologically based) boundaries imposed. The model proposed appears to be a useful tool for the analysis of fragmentation caused by plans for large territories.

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Resource type Text
Date of creation 2024-06-18
Date of last revision 2024-09-17
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Metadata identifier dbd38367-8521-5685-9582-2757bed0dd95
Metadata language Spanish
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ISO 19115 topic category biota
Other identifier 10.1016/j.jenvman.2009.12.013
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INSPIRE identifier ESPMITECOIEPNBFRAGM542
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Geographic identifier Spain
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"{\"type\": \"Polygon\", \"coordinates\": [[[-18.16, 27.64], [4.32, 27.64], [4.32, 43.79], [-18.16, 43.79], [-18.16, 27.64]]]}"
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  1. Journal of Environmental Management. Vol. 91
  2. Num. 5
  3. pags. 1.087-1.096
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Name of the dataset creator Mancebo Quintana, S., Martín Ramos, B., Casermeiro Martínez, M.Á. y Otero Pastor, I.
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