| Abstract | The relative role of propagule pressure, abiotic and biotic variables as determinants of non-native species occurrence differs among studies, hindering the synthesis of emergent patterns in invasion ecology and preventing generalisation for conservation actions. In order to produce a broad and general assessment of the occurrence of alien species in aquatic habitats, we proposed a macroecological approach to assess the drivers of occurrence of alien species in all biota (microorganisms, plants and animals) across several natural habitats in freshwater ecosystems in Italy, and we generalised the results of the analysis to provide a risk map of the occurrence of alien species.
We determined that abiotic climatic variables were good predictors of alien species occurrence. Indeed, these variables, together with propagule pressure, expressed as the proximity to major inhabited areas, and differences in the receiving community, expressed as the native species richness, played a crucial role in determining the number of alien species. Furthermore, we found evidence of an influence of body size in determining the occurrence of the non-native species. By using the predictions of our model, we addressed the probability of the occurrence of alien species in freshwater habitats across the whole country and highlighted areas at higher risk. |
| Authors | Colangelo, Paolo; Fontaneto, Diego; Marchetto, Aldo; Ludovisi, Alessandro; Basset, Alberto; Bartolozzi, Luca; Bertani, Isabella; Campanaro, Alessandro; Cattaneo, Antonella; Cianferoni, Fabio; Corriero, Giuseppe; Ficetola, Gentile Francesco; Pierri, Cataldo; Rossetti, Gianpaolo; Boggero, Angela |
| Text | 431512 2016 alien species Non native species in Italian freshwater habitats a macroecological assessment of invasion drivers Colangelo, Paolo; Fontaneto, Diego; Marchetto, Aldo; Ludovisi, Alessandro; Basset, Alberto; Bartolozzi, Luca; Bertani, Isabella; Campanaro, Alessandro; Cattaneo, Antonella; Cianferoni, Fabio; Corriero, Giuseppe; Ficetola, Gentile Francesco; Pierri, Cataldo; Rossetti, Gianpaolo; Boggero, Angela Institute of Ecosystem Study, ISE CNR, Verbania, Italy 1 Department of Cellular and Environmental Biology, University of Perugia, Perugia, Italy 2 Department of Science and Biological and Environmental Technology, University of Salento, Lecce, Italy 3 Natural History Museum, Zoological Section la Specola , University of Florence, Firenze, Italy 4 Department of Life Sciences, University of Parma, Parma, Italy 5 National Centre for The Study and Conservation of Forest Biodiversity Bosco Della Fontana , National Forest Service, Mantova, Italy 6 Departement de Sciences Biologiques, Universite de Montreal, Montreal, Canada 7 Department of Biology, University of Bari Aldo Moro , Bari, Italy 8 Laboratoire d ecologie Alpine LECA , Universite Grenoble alpes, Grenoble, France 9 33rd SIL Congress July 31, 2016 August 5, 2016 Torino, Italy. Book of abstracts Published version 33rd SIL Congress. July 31, 2016 August 5, 2016. Torino, Italy Torino 31/07 05/08/2016 Internazionale Contributo The relative role of propagule pressure, abiotic and biotic variables as determinants of non native species occurrence differs among studies, hindering the synthesis of emergent patterns in invasion ecology and preventing generalisation for conservation actions. In order to produce a broad and general assessment of the occurrence of alien species in aquatic habitats, we proposed a macroecological approach to assess the drivers of occurrence of alien species in all biota microorganisms, plants and animals across several natural habitats in freshwater ecosystems in Italy, and we generalised the results of the analysis to provide a risk map of the occurrence of alien species. We determined that abiotic climatic variables were good predictors of alien species occurrence. Indeed, these variables, together with propagule pressure, expressed as the proximity to major inhabited areas, and differences in the receiving community, expressed as the native species richness, played a crucial role in determining the number of alien species. Furthermore, we found evidence of an influence of body size in determining the occurrence of the non native species. By using the predictions of our model, we addressed the probability of the occurrence of alien species in freshwater habitats across the whole country and highlighted areas at higher risk. Colangelo et al. 2016 Non native species Italian freshwater habitats Congresso SIL Torino 2016.07.20 abs. Colangelo et al. Non native species Italian freshwater habitats Congresso SIL Torino.pdf Abstract in atti di convegno angela.boggero BOGGERO ANGELA paolo.colangelo COLANGELO PAOLO fabio.cianferoni CIANFERONI FABIO aldo.marchetto MARCHETTO ALDO diego.fontaneto FONTANETO DIEGO LIFEWATCH Life Watch |
