Localisation
SPREP LIBRARY
Lieu de publication
UNKNOWN
Description physique:
10 p
Numéro d'appel
[EL]
Type de contenu
Langue
English
Identifiant de dossier:
461
Ancien numéro d'identification PEIN:
81915
Notes générales
copy of pdf for uploading; Our ability to predict the identity of future invasive alien species is largely based upon knowledge of prior invasion history. Emerging alien speciesthose never before encountered as
alienstherefore pose a significant challenge to biosecurity interventions worldwide. Using a global database of the first regional records of alien species covering the years 15002005 we detected a urprisingly high proportion of species in recent records that have never been recorded as alien before. The high proportion of these emerging alien species mainly resulted from the increased accessibility of new source species pools in the native range. Risk assessment approaches that rely less on invasion history will need to be prioritized.
alienstherefore pose a significant challenge to biosecurity interventions worldwide. Using a global database of the first regional records of alien species covering the years 15002005 we detected a urprisingly high proportion of species in recent records that have never been recorded as alien before. The high proportion of these emerging alien species mainly resulted from the increased accessibility of new source species pools in the native range. Risk assessment approaches that rely less on invasion history will need to be prioritized.
Disponible en ligne
Rubrique(s) thématique(s)
Invasive species - Management - Global
Résumé
Our ability to predict the identity of future invasive alien species is largely based upon knowledge of prior invasion history. Emerging alien speciesthose never encountered as aliens beforetherefore pose a significant challenge to biosecurity interventions worldwide. Understanding their temporal trends, origins, and the drivers of their spread is pivotal to improving prevention and risk assessment tools. Here, we use a database of 45,984 first records of 16,019 established alien species to investigate the temporal dynamics of occurrences of emerging alien species worldwide. Even after many centuries of invasions the rate of emergence of new alien species is still high: One-quarter of first records during 20002005 were of species that had not been previously recorded anywhere as alien, though with large variation across taxa. Model results show that the high proportion of emerging alien species cannot be solely explained by increases in well-known drivers such as the amount of imported commodities from historically important source regions. Instead, these dynamics reflect the incorporation of new regions into the pool of potential alien species, likely as a consequence of expanding trade networks and environmental change. This process compensates for the depletion of the historically important source species pool through successive invasions. We estimate that 116% of all species on Earth, depending on the taxonomic group, qualify as potential alien species. These results suggest that there remains a high proportion of emerging alien species we have yet to encounter, with future impacts that are difficult to predict.
Localisation
SPREP LIBRARY
Lieu de publication
UNKNOWN
Description physique:
10 p
Numéro d'appel
[EL]
Type de contenu
Langue
English
Identifiant de dossier:
461
Ancien numéro d'identification PEIN:
81915
Notes générales
copy of pdf for uploading; Our ability to predict the identity of future invasive alien species is largely based upon knowledge of prior invasion history. Emerging alien speciesthose never before encountered as
alienstherefore pose a significant challenge to biosecurity interventions worldwide. Using a global database of the first regional records of alien species covering the years 15002005 we detected a urprisingly high proportion of species in recent records that have never been recorded as alien before. The high proportion of these emerging alien species mainly resulted from the increased accessibility of new source species pools in the native range. Risk assessment approaches that rely less on invasion history will need to be prioritized.
alienstherefore pose a significant challenge to biosecurity interventions worldwide. Using a global database of the first regional records of alien species covering the years 15002005 we detected a urprisingly high proportion of species in recent records that have never been recorded as alien before. The high proportion of these emerging alien species mainly resulted from the increased accessibility of new source species pools in the native range. Risk assessment approaches that rely less on invasion history will need to be prioritized.
Dossier créé: 22-Aug-2018
Dossier modifié: 09-Dec-2021