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The distribution of Carrichtera annua in Australia: introduction, spread and probable limits

Cooke, Julia; Groves, R. H. and Ash, Julian (2011). The distribution of Carrichtera annua in Australia: introduction, spread and probable limits. Rangeland Journal, 33(1) pp. 23–35.

DOI (Digital Object Identifier) Link: https://doi.org/10.1071/RJ10001
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Abstract

Carrichtera annua (L.) DC. (Brassicaceae) or Ward’s Weed, a major weed of semi-arid rangelands of southern Australia, has been collected widely since its introduction early in the 20th century. Collated records were used to suggest a single site of accidental introduction in South Australia, evidence of a lag phase of ~30 years (probably due to edaphic restrictions) before rapid spread, involving infrequent long-distance human-aided dispersal across southern Australia and a relatively stable range since the 1960s. Climate and soil analyses suggest that abiotic factors limit the distribution of C. annua, with the species being restricted to areas with winter-dominated rainfall and calcareous soils. Documentation of the history of a successful invasion, including the spread and probable limits of the current distribution of a species, is important for managing invasions. This study also highlights that a single, accidental introduction can result in a long-lasting, widespread problematic weed.

Item Type: Journal Item
ISSN: 1834-7541
Keywords: climate; exotic; invasive; Mediterranean; soil type; weed
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 43289
Depositing User: Julia Cooke
Date Deposited: 16 Jun 2015 11:37
Last Modified: 07 Dec 2018 10:31
URI: http://oro.open.ac.uk/id/eprint/43289
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