Kam mir irgendwie bekannt vor: Dachte schon, wir seien schneller gewesen!
viewtopic.php?f=23&t=1178&p=10100#p10100 Cleo BERTELSMEIER, Olivier BLIGHT & Franck COURCHAMP
Invasions of ants (Hymenoptera: Formicidae) in light of global climate change.- Myrmecological News 22, 25-42 Vienna, February 2016
Aber der Artikel aus dem Tagesanzeiger bezieht sich ja auf einen neuen Beitrag der Lausanner Forscher:Recent human history governs global ant invasion dynamics. Cleo Bertelsmeier, Sébastien Ollier, Andrew Liebhold & Laurent Keller
Nature Ecology & Evolution 1, Article number: 0184 (2017)
doi:10.1038/s41559-017-0184
Published online:22 June 2017:
http://www.nature.com/articles/s41559-017-0184 Abstract:Human trade and travel are breaking down biogeographic barriers, resulting in shifts in the geographical distribution of organisms, yet it remains largely unknown whether different alien species generally follow similar spatiotemporal colonization patterns and how such patterns are driven by trends in global trade. Here, we analyse the global distribution of 241 alien ant species and show that these species comprise four distinct groups that inherently differ in their worldwide distribution from that of native species. The global spread of these four distinct species groups has been greatly, but differentially, influenced by major events in recent human history, in particular historical waves of globalization (approximately 1850–1914 and 1960 to present), world wars and global recessions. Species in these four groups also differ in six important morphological and life-history traits and their degree of invasiveness. Combining spatiotemporal distribution data with life-history trait information provides valuable insight into the processes driving biological invasions and facilitates identification of species most likely to become invasive in the future.
A hallmark of the Anthropocene is range expansion by alien species around the world1, facilitated by the construction of transport networks and the globalization of trade and labour markets since the beginning of the Industrial Revolution2. The roles of physical distance and geological barriers in limiting range boundaries have been reduced and species increasingly establish in new regions1. This spread of alien species has become a major threat to biodiversity and ecosystem services worldwide3 and rates of new establishments are predicted to continue to increase with ongoing effects of globalization4,5.
Previous research has mainly focused on retracing the invasion routes of individual species6 and mapping donor and recipient regions for entire taxonomic groups7, sometimes linking colonization probability to environmental factors8,9. It thus remains largely unknown whether alien species within a taxonomic group follow similar invasion dynamics, if past global trade patterns have affected these species differentially and which species’ traits are selected by human-mediated transport. Here, we address these questions in ants, a group of animals particularly suitable to test hypotheses about global invasion dynamics because they are an ecologically diverse group that is present in almost all terrestrial habitats on all continents except Antarctica10. Moreover, because of their small size11 and complex social structure, ants are a particularly prominent group of invasive species worldwide12,13, able to displace numerous native species and rapidly disassemble communities14. To investigate the spatiotemporal dynamics of ant invasions, and to test for factors favouring spread, we assembled a dataset comprising the current distribution and historical spread (establishment) of ants worldwide and compiled data on nine morphological and life-history traits previously suggested to play a role in ant invasions12,13,15.
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