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Latitudinal patterns of biological invasions in marine ecosystems : a polar perspective

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conference contribution
posted on 06.12.2017, 00:00 by G Ruiz, Chad Hewitt
Biological invasions in coastal ecosystems have occurred throughout Earth’s history, but the scale and tempo have increased greatly in recent time due to human-mediated dispersal. Available data suggest that a strong latitudinal pattern exists for such human introductions in coastal systems. The documented number of introduced species (with established, self-sustaining populations) is greatest in temperate regions and declines sharply at higher latitudes. This observed invasion pattern across latitudes may result from differences in (1) historical baseline knowledge, (2) propagule supply, (3) resistance to invasion, and (4) disturbance regime. To date, the relative importance of these mechanisms across geographic regions has not been evaluated, and each may be expected to change over time. Of particular interest and concern are the interactive effects of climate change and human activities on marine invasions at high latitudes. Shifts in invasion dynamics may be especially pronounced in the Northern Hemisphere, where current models predict not only an increase in sea surface temperatures but also a rapid reduction in sea ice in the Arctic. These environmental changes may greatly increase invasion opportunity at high northern latitudes due to shipping, mineral exploration, shoreline development, and other human responses.

History

Start Page

347

End Page

358

Number of Pages

12

Start Date

01/01/2007

ISBN-10

097884601X

ISBN-13

9780978846015

Location

Washington DC, USA

Publisher

Smithsonian Institution Scholarly Press

Place of Publication

Washington D.C.

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Australian Maritime College; Not affiliated to a Research Institute; Smithsonian Environmental Research Center;

Era Eligible

Yes

Name of Conference

Smithsonian at the Poles Symposium

Exports

CQUniversity

Exports