Integración de impactos ecológicos causados por plantas exóticas invasoraspropuesta metodológica

  1. Pilar Castro-Díez
  2. Álvaro Alonso Fernández
  3. Mónica Gutiérrez López
  4. Paloma de las Heras Puñal
  5. Silvia Medina Villar
  6. Esther Pérez Corona
  7. Dolores Trigo Aza
  8. Beatriz Rodríguez Vázquez de Aldana
Journal:
Ecosistemas: Revista científica y técnica de ecología y medio ambiente

ISSN: 1697-2473

Year of publication: 2015

Issue Title: Las invasiones biológicas y su impacto en los ecosistemas

Volume: 24

Issue: 1

Pages: 12-17

Type: Article

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Abstract

In Spain as in Europe there are too many invasive alien plants to address their management, so it is necessary to give priority to the most harmful species. But this requires the use of quantitative, systematic and comparable impact measures. The information available is uneven in terms of the criteria and variables to measure impacts and, therefore, difficult to integrate. We propose the following method to integrate measures of impacts from different studies: 1) search for case studies, 2) calculation of effect sizes; 3) classification of cases by level of organization, 4) integration of all effect sizes for each species and level of impact with meta-analysis techniques, and 5) estimate a consistency index (based on the heterogeneity among cases) and of reliability (based on the number of cases). We apply this method to estimate the impacts in Spain of three invasive trees (Ailanthus altissima, Robinia pseudoacacia and Ulmus pumila). We found 50 cases for A. altissima, 39 for R. pseudoacacia and 15 for U. pumila. The impacts at the ecosystem level (fertility) were the most studied, while the community or the individual level are less documented. Robinia pseudoacacia tends to increase fertility, while A. altissima does not alter this property. The proposed methodology has the advantage of allowing an impact assessment using data from disparate studies, but its application is limited by the availability of case studies.

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Funding information

Este estudio ha sido financiado por el proyecto del Ministerio de Ciencia e Innovaci?n CGL2010-16388/BOS, por el proyecto de la Junta de Comunidades de Castilla-La Mancha POII10-0179-470, por el proyecto de la Universidad de Alcal? CCG2013/EXP-054 y por la red REMEDINAL S2009/AMB-1783 de la Comunidad de Madrid.

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