期刊
PLANT BIOLOGY
卷 11, 期 6, 页码 803-811出版社
WILEY
DOI: 10.1111/j.1438-8677.2008.00185.x
关键词
Abiotic filters; climatic origin; disturbed areas; inherited trait; invasive-native comparison
资金
- Spanish Ministry for Education and Science [RASINV, GL2004-04884-C02 02/BOS, CGL2007-61873/BOS, REDESIN CGL2007-61165/BOS]
Flowering phenology is an important and poorly understood plant trait that may possibly be related to the invasiveness potential of alien species. The present work evaluates whether flowering time of invasive alien species is a key trait to overcome the climatic filters operating in continental Mediterranean ecosystems of Spain (characterised by summer drought and low temperatures in winter). We conducted comparisons between the flowering phenology of the invasive species in their native range and in Spain, and between flowering phenology of 91 coexisting invasive-native species pairs. For the alien species, geographical change from the native to the invaded region did not result in shifts in the start and the length of the flowering period. Overall, climatic conditions in the native range of species selected for a flowering pattern is maintained after translocation of the species to another region. Flowering of tropical and temperate invasive alien species peaked in summer, which contrasts with the spring flowering of native and invasive alien species of Mediterranean climate origin. By exploiting this new temporal niche, these invasive alien species native to tropical and temperate regions benefit from reduced competition with natives for abiotic and biotic resources. We suggest that human-mediated actions have reduced the strength of the summer drought filter in particular microhabitats, permitting the invasion of many summer-flowering aliens.
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