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Predicting invasive potential of smooth crotalaria (Crotalaria pallida) in Brazilian national parks based on African records

Published online by Cambridge University Press:  20 January 2017

Rafael Luís Fonseca ,
Paulo Roberto Guimarães Jr. ,
Sérgio Rodrigues Morbiolo ,
Ricardo Scachetti-Pereira  and
A. Townsend Peterson
Paulo Roberto Guimarães Jr.
Affiliation:
Integrative Ecology Group, Estación Biológica Doñana, CSIC, Apdo. 1056, E-41080 Sevilla, Spain, and Programa de Pós-Graduação em Ecologia, Universidade Estadual de Campinas (UNICAMP), CP 6109, 13083-970, Campinas, SP, Brazil
Sérgio Rodrigues Morbiolo
Affiliation:
Programa de Pós-Graduação em Biologia Vegetal, Universidade Estadual de Campinas (UNICAMP), CP 6109, 13083-970, Campinas, SP, Brazil
Ricardo Scachetti-Pereira
Affiliation:
Natural History Museum and Biodiversity Research Center, University of Kansas, Lawrence, KS 66045
A. Townsend Peterson
Affiliation:
Natural History Museum and Biodiversity Research Center, University of Kansas, Lawrence, KS 66045
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Abstract

Alien weed species rank among the most important threats to conservation of biodiversity, making understanding the extent to which protected natural areas are vulnerable to invasion by weeds pivotal in long-term maintenance and conservation of biodiversity. We investigated the potential geographic range of the invasive paleotropical weed, smooth crotalaria, in protected natural areas across Brazil. The ecological niche dimensions of smooth crotalaria in Africa (its putative original distribution) were modeled using a genetic algorithm. Models for the native range and their projections to South America showed good predictive ability when challenged with independent occurrence data. All Brazilian protected natural areas were predicted as highly vulnerable to invasion by this species. However, smooth crotalaria appears more likely to occur in open (savanna-like vegetation, such as cerrado and pantanal) and highly fragmented (Atlantic forest) areas than in extensive closed forests (Amazon). Management suggestions and research priorities are outlined based on these results.

Keywords

smooth crotalaria, Crotalaria pallida Ait. CVTMUAlien speciesconservation policiesconservation unitsecological niche modelsgeographic distribution
Type
Weed Biology and Ecology
Information
Weed Science , Volume 54 , Issue 3 , June 2006 , pp. 458 - 463
Copyright
Copyright © Weed Science Society of America 

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