Archiviertes Physik-Kolloquium:

03. Feb. 2011, 16:15 Uhr, Gebäude NW1, Raum H3

Statistische Physik von Bioinvasion: Ausbreitungsdynamik invasiver Arten im Netzwerk der globalen Schiffsverbindungen

Prof. Dr. Bernd Blasius, Universit├Ąt Oldenburg, ICBM

Transportation networks play a crucial role in human mobility, the exchange of goods, and the spread of invasive species. With 90% of world trade carried by sea, global shipping provides one of the most important modes of transportation. Shipping also constitutes the world largest transportation vector for marine bioinvasion, transferring accidentally numerous species around the world. Here we use information about the itineraries of 16,363 cargo ships during the year 2007 to construct a network of shipping connections between ports. We perform a statistical analysis of the network topology, and we show that the network possesses a heavy-tailed distribution for the connectivity of ports with systematic differences between ship types. Our analysis improves current assumptions based on gravity models of ship movements, an important step towards understanding global patterns of shipping mobility and trade. Coupling the shipping network with biogeography and environmental conditions at the ports, we quantify the