haku: @indexterm BIOLOGY / yhteensä: 18
viite: 2 / 18
| Tekijä: | Costello, C. (et al.) |
| Otsikko: | Unintended biological invasions: Does risk vary by trading partner? |
| Lehti: | Journal of Environmental Economics and Management
2007 : NOV, VOL. 54:3, p. 262-276 |
| Asiasana: | trade biology risk models |
| Kieli: | eng |
| Tiivistelmä: | This study suggests that international trade is the main conduit for unintentional and damaging species introductions. However, it is stated that there is heterogeneity and variance in the riskiness of imports on damaging introduction of species. An analytical model linking exotic species introductions and findings to trade volumes is built. The method of research is an examination and estimation by using historical data set on global trade and species introductions by region. The findings support the theoretical predictions that trade from different regions have different risks and that the cumulative number of introductions from a region is a hollow function of imports. |
SCIMA