Autori
Dalmazzone, Silvana
Giaccaria, Sergio

Titolo
Economic drivers of biological invasions: A worldwide, bio-geographical analysis"
Periodico
Università degli studi di Torino. Dip. Di Economia e Statistica Cognetti de Martiis. Working paper series
Anno: 2012 - Volume: 10 - Fascicolo: 15 - Pagina iniziale: 1 - Pagina finale: 31

The introduction of harmful non-indigenous species is generally acknowledged to depend both on the propagule pressure imposed by openness to international trade and on the health of the receiving ecosystem. Bio-geographical factors however play a crucial role in determining the level of risk associated with trade. We develop an analytical treatment of bio-geographical similarity between trade partners, within a model that links the incidence of invasive species to resource extraction, polluti on and to import volumes disaggregated by country and region of origin. The model, estimat ed with data on invasive species of all taxa in 123 countries, shows that considering the g eographical structure of trade flows and the bio-geographical similarity between sources and destinations substantially improves our understanding of the drivers of biolog ical invasions. The results allow us to identify, in a worldwide perspective, the relative risk of biological invasions (by habitat and organism type) entailed by different commercial partners.



Testo completo: http://www.est.unito.it/do/home.pl/Download?doc=/allegati/wp2012dip/15_wp_dalmazzonegiaccaria.pdf

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