eCite Digital Repository

The distribution and diversity of tropical Australian marine bio-invasions

Citation

Hewitt, CL, The distribution and diversity of tropical Australian marine bio-invasions, Pacific Science, 56, (2) pp. 213-222. ISSN 0030-8870 (2002) [Refereed Article]

Abstract

Marine invasions have been identified in virtually all regions of the world, yet relatively few introductions have been detected in the Tropics. This has been attributed at least in part to an increase in intrinsic native community resistance at lower latitudes resulting from strongly interacting food webs in high(er) diversity systems. However, recent evidence from surveys in Australia and elsewhere indicate that tropical systems are also susceptible to invasions, though detection ability may be constrained by taxonomic limitations. Preliminary analyses of data from surveys designed to detect introduced species do not support a pattern of decreased invasion success in higher diversity systems but do indicate a strong latitudinal gradient at the mesoscale of Australia. This cannot be attributed to disparities in search effort (controlled for by consistency in survey effort) or taxonomic knowledge. The original hypothesis of a decreased relative susceptibility of tropical versus temperate biota to invasions may remain viable, but be scale dependent. Additional confounding factors may include differing vector strengths and availability of source bioregions.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Marine Oceanic Processes (excl. climate related)
Author:Hewitt, CL (Professor Chad Hewitt)
ID Code:46905
Year Published:2002
Deposited By:Australian Maritime College
Deposited On:2008-08-01
Last Modified:2008-11-05
Downloads:0

Repository Staff Only: item control page