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Species distribution models and ecological suitability analysis for potential tick vectors of lyme disease in Mexico.

Illoldi-Rangel P, Rivaldi CL, Sissel B, Trout Fryxell R, Gordillo-Pérez G, Rodríguez-Moreno A, Williamson P, Montiel-Parra G, Sánchez-Cordero V, Sarkar S - J Trop Med (2012)

Bottom Line: Species distribution models were constructed for ten Ixodes species and Amblyomma cajennense for a region including Mexico and Texas.For Mexico, species geographic ranges were predicted by restricting the models to cells which have a higher probability than the lowest probability of the cells in which a presence record was located.There was spatial nonconcordance between the distributions of Amblyomma cajennense and the Ixodes group with the former restricted to lowlands and mainly the eastern coast of Mexico and the latter to montane regions with lower temperature.

View Article: PubMed Central - PubMed

Affiliation: Section of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA.

ABSTRACT
Species distribution models were constructed for ten Ixodes species and Amblyomma cajennense for a region including Mexico and Texas. The model was based on a maximum entropy algorithm that used environmental layers to predict the relative probability of presence for each taxon. For Mexico, species geographic ranges were predicted by restricting the models to cells which have a higher probability than the lowest probability of the cells in which a presence record was located. There was spatial nonconcordance between the distributions of Amblyomma cajennense and the Ixodes group with the former restricted to lowlands and mainly the eastern coast of Mexico and the latter to montane regions with lower temperature. The risk of Lyme disease is, therefore, mainly present in the highlands where some Ixodes species are known vectors; if Amblyomma cajennense turns out to be a competent vector, the area of risk also extends to the lowlands and the east coast.

No MeSH data available.


Related in: MedlinePlus

Species distribution model and ecoregions for the Ixodes group. The principal ecoregions are shown (see text).
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fig7: Species distribution model and ecoregions for the Ixodes group. The principal ecoregions are shown (see text).

Mentions: Table 5 shows the ecoregional distribution of the two SDMs (see, also, Figures 6 and 7). Although both SDMs share ecoregions, A. cajennense presence was primarily predicted for ecoregions such as mangroves and marshes along the coast of Mexico at low altitudes (Figure 6). In Mexico and the United States, this species is found in areas where the mean temperature is around 13°–16°C and the NDVI is high [36]. Relatively low mean temperatures and differences in the seasonal patterns of rainfall may limit this species colonization of areas to the north of its current distribution. Low temperatures are likely keeping the species out of elevated areas, such as the Sierra Madre in Mexico. The southern distribution of A. cajennense appears to be mainly restricted by relatively low temperatures and not by low humidity [36].


Species distribution models and ecological suitability analysis for potential tick vectors of lyme disease in Mexico.

Illoldi-Rangel P, Rivaldi CL, Sissel B, Trout Fryxell R, Gordillo-Pérez G, Rodríguez-Moreno A, Williamson P, Montiel-Parra G, Sánchez-Cordero V, Sarkar S - J Trop Med (2012)

Species distribution model and ecoregions for the Ixodes group. The principal ecoregions are shown (see text).
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3307011&req=5

fig7: Species distribution model and ecoregions for the Ixodes group. The principal ecoregions are shown (see text).
Mentions: Table 5 shows the ecoregional distribution of the two SDMs (see, also, Figures 6 and 7). Although both SDMs share ecoregions, A. cajennense presence was primarily predicted for ecoregions such as mangroves and marshes along the coast of Mexico at low altitudes (Figure 6). In Mexico and the United States, this species is found in areas where the mean temperature is around 13°–16°C and the NDVI is high [36]. Relatively low mean temperatures and differences in the seasonal patterns of rainfall may limit this species colonization of areas to the north of its current distribution. Low temperatures are likely keeping the species out of elevated areas, such as the Sierra Madre in Mexico. The southern distribution of A. cajennense appears to be mainly restricted by relatively low temperatures and not by low humidity [36].

Bottom Line: Species distribution models were constructed for ten Ixodes species and Amblyomma cajennense for a region including Mexico and Texas.For Mexico, species geographic ranges were predicted by restricting the models to cells which have a higher probability than the lowest probability of the cells in which a presence record was located.There was spatial nonconcordance between the distributions of Amblyomma cajennense and the Ixodes group with the former restricted to lowlands and mainly the eastern coast of Mexico and the latter to montane regions with lower temperature.

View Article: PubMed Central - PubMed

Affiliation: Section of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA.

ABSTRACT
Species distribution models were constructed for ten Ixodes species and Amblyomma cajennense for a region including Mexico and Texas. The model was based on a maximum entropy algorithm that used environmental layers to predict the relative probability of presence for each taxon. For Mexico, species geographic ranges were predicted by restricting the models to cells which have a higher probability than the lowest probability of the cells in which a presence record was located. There was spatial nonconcordance between the distributions of Amblyomma cajennense and the Ixodes group with the former restricted to lowlands and mainly the eastern coast of Mexico and the latter to montane regions with lower temperature. The risk of Lyme disease is, therefore, mainly present in the highlands where some Ixodes species are known vectors; if Amblyomma cajennense turns out to be a competent vector, the area of risk also extends to the lowlands and the east coast.

No MeSH data available.


Related in: MedlinePlus