Limits...
Global invasion of Lantana camara: has the climatic niche been conserved across continents?

Goncalves E, Herrera I, Duarte M, Bustamante RO, Lampo M, Velásquez G, Sharma GP, García-Rangel S - PLoS ONE (2014)

Bottom Line: Our results demonstrate that while L. camara occupied subsets of its original native niche in Africa and Australia, in India its niche shifted significantly.As a result, new potentially invasible areas were identified in central Africa and southern Australia.Our findings do not support the hypothesis of niche conservatism for the invasion of L. camara.

View Article: PubMed Central - PubMed

Affiliation: Centro de Ecología, Instituto Venezolano de Investigaciones Científicas, Caracas, Venezuela; Departamento de Estudios Ambientales, Universidad Simón Bolívar, Caracas, Venezuela.

ABSTRACT
Lantana camara, a native plant from tropical America, is considered one of the most harmful invasive species worldwide. Several studies have identified potentially invasible areas under scenarios of global change, on the assumption that niche is conserved during the invasion process. Recent studies, however, suggest that many invasive plants do not conserve their niches. Using Principal Components Analyses (PCA), we tested the hypothesis of niche conservatism for L. camara by comparing its native niche in South America with its expressed niche in Africa, Australia and India. Using MaxEnt, the estimated niche for the native region was projected onto each invaded region to generate potential distributions there. Our results demonstrate that while L. camara occupied subsets of its original native niche in Africa and Australia, in India its niche shifted significantly. There, 34% of the occurrences were detected in warmer habitats nonexistent in its native range. The estimated niche for India was also projected onto Africa and Australia to identify other vulnerable areas predicted from the observed niche shift detected in India. As a result, new potentially invasible areas were identified in central Africa and southern Australia. Our findings do not support the hypothesis of niche conservatism for the invasion of L. camara. The mechanisms that allow this species to expand its niche need to be investigated in order to improve our capacity to predict long-term geographic changes in the face of global climatic changes.

Show MeSH
Differences in maximum temperature of the warmest month between the native range of L. camara and its invaded range in India.The mean values and their standard errors were estimated using the temperature of the warmest month at each location where this plant is present in India and in its native range.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4208836&req=5

pone-0111468-g008: Differences in maximum temperature of the warmest month between the native range of L. camara and its invaded range in India.The mean values and their standard errors were estimated using the temperature of the warmest month at each location where this plant is present in India and in its native range.

Mentions: According to the MESS analysis, India was the only region with climatic conditions non-analogous to those observed in the native region (Figure 7). In India, 34% of the occurrences are in locations where maximum temperatures of the warmest month (BIO 5) reach in average 43°C, a value that is significantly higher (t-test, t = 87.159, p<0.001, see Figure 8) than the average of maximum temperature of the warmest month in the native region (35°C).


Global invasion of Lantana camara: has the climatic niche been conserved across continents?

Goncalves E, Herrera I, Duarte M, Bustamante RO, Lampo M, Velásquez G, Sharma GP, García-Rangel S - PLoS ONE (2014)

Differences in maximum temperature of the warmest month between the native range of L. camara and its invaded range in India.The mean values and their standard errors were estimated using the temperature of the warmest month at each location where this plant is present in India and in its native range.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4208836&req=5

pone-0111468-g008: Differences in maximum temperature of the warmest month between the native range of L. camara and its invaded range in India.The mean values and their standard errors were estimated using the temperature of the warmest month at each location where this plant is present in India and in its native range.
Mentions: According to the MESS analysis, India was the only region with climatic conditions non-analogous to those observed in the native region (Figure 7). In India, 34% of the occurrences are in locations where maximum temperatures of the warmest month (BIO 5) reach in average 43°C, a value that is significantly higher (t-test, t = 87.159, p<0.001, see Figure 8) than the average of maximum temperature of the warmest month in the native region (35°C).

Bottom Line: Our results demonstrate that while L. camara occupied subsets of its original native niche in Africa and Australia, in India its niche shifted significantly.As a result, new potentially invasible areas were identified in central Africa and southern Australia.Our findings do not support the hypothesis of niche conservatism for the invasion of L. camara.

View Article: PubMed Central - PubMed

Affiliation: Centro de Ecología, Instituto Venezolano de Investigaciones Científicas, Caracas, Venezuela; Departamento de Estudios Ambientales, Universidad Simón Bolívar, Caracas, Venezuela.

ABSTRACT
Lantana camara, a native plant from tropical America, is considered one of the most harmful invasive species worldwide. Several studies have identified potentially invasible areas under scenarios of global change, on the assumption that niche is conserved during the invasion process. Recent studies, however, suggest that many invasive plants do not conserve their niches. Using Principal Components Analyses (PCA), we tested the hypothesis of niche conservatism for L. camara by comparing its native niche in South America with its expressed niche in Africa, Australia and India. Using MaxEnt, the estimated niche for the native region was projected onto each invaded region to generate potential distributions there. Our results demonstrate that while L. camara occupied subsets of its original native niche in Africa and Australia, in India its niche shifted significantly. There, 34% of the occurrences were detected in warmer habitats nonexistent in its native range. The estimated niche for India was also projected onto Africa and Australia to identify other vulnerable areas predicted from the observed niche shift detected in India. As a result, new potentially invasible areas were identified in central Africa and southern Australia. Our findings do not support the hypothesis of niche conservatism for the invasion of L. camara. The mechanisms that allow this species to expand its niche need to be investigated in order to improve our capacity to predict long-term geographic changes in the face of global climatic changes.

Show MeSH