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Abstract:

Habitat modification alters several aspects of the original fauna, among them the opportunity for thermoregulation. Here, we studied the thermal biology of sympatric populations of two lizard species (Liolaemus multimaculatus and Liolaemus wiegmannii) in two different situations; a grassland without trees (natural habitat) and in a grassland plus the exotic tree Acacia longifolia (modified habitat), aiming to assess whether the structural alteration of native Pampean coastal grasslands of Argentina affects the thermal biology of these lizards. Field body temperatures, laboratory preferred temperatures, micro-environmental temperatures, operative temperatures, thermoregulatory efficiency and spatial distribution of each species were analyzed in both habitats. Environmental operative temperature was 0.64°C lower in the modified habitat (Te=38.39°C) than in the natural (Te=39.03°C). Thermoregulatory efficiency (E) of L. wiegmannii was lower in modified sites (E=0.58) than in natural sites (E=0.70). This difference may be because this lizard occupied shaded microhabitats under acacias, with suboptimal thermal features. In contrast, L. multimaculatus in the modified habitat restricted its activity to open microenvironments that retained a similar structure to that of the native habitat, while maintaining high thermoregulatory efficiency in both habitat types (Emodified=0.92; Enatural=0.96). Although these two lizard species are phylogenetically close, they respond differently to human-induced changes in their thermal environments. The introduction of A. longifolia into coastal grasslands for L. wiegmannii in particular, this introduction converts its native habitat into a suboptimal thermal environment. © 2013 Elsevier Ltd.

Registro:

Documento: Artículo
Título:Effects on the thermoregulatory efficiency of two native lizards as a consequence of the habitat modification by the introduction of the exotic tree Acacia longifolia
Autor:Stellatelli, O.A.; Vega, L.E.; Block, C.; Cruz, F.B.
Filiación:Laboratorio de Vertebrados, Departamento de Biología, Instituto de Investigaciones Marinas y Costeras (IIMyC), CONICET, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Dean Funes 3250 (B7602AYJ) Mar del Plata, Buenos Aires, Argentina
Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA), CONICET, Universidad Nacional del Comahue, Quintral 1250, (8400) San Carlos de Bariloche, Rio Negro, Argentina
Idioma: Inglés
Palabras clave:Exotic plants; Habitat modification; Liolaemus; Lizard; Thermoregulation; Acacia; Acacia longifolia; article; body temperature; controlled study; discriminant analysis; environmental temperature; grassland; habitat; Liolaemus multimaculatus; Liolaemus wiegmannii; lizard; microenvironment; microhabitat; nonhuman; phylogeny; species distribution; thermoregulation
Año:2013
Volumen:38
Número:3
Página de inicio:135
Página de fin:142
DOI: http://dx.doi.org/10.1016/j.jtherbio.2012.12.005
Título revista:Journal of Thermal Biology
Título revista abreviado:J. Therm. Biol.
ISSN:03064565
CODEN:JTBID
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03064565_v38_n3_p135_Stellatelli

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Citas:

---------- APA ----------
Stellatelli, O.A., Vega, L.E., Block, C. & Cruz, F.B. (2013) . Effects on the thermoregulatory efficiency of two native lizards as a consequence of the habitat modification by the introduction of the exotic tree Acacia longifolia. Journal of Thermal Biology, 38(3), 135-142.
http://dx.doi.org/10.1016/j.jtherbio.2012.12.005
---------- CHICAGO ----------
Stellatelli, O.A., Vega, L.E., Block, C., Cruz, F.B. "Effects on the thermoregulatory efficiency of two native lizards as a consequence of the habitat modification by the introduction of the exotic tree Acacia longifolia" . Journal of Thermal Biology 38, no. 3 (2013) : 135-142.
http://dx.doi.org/10.1016/j.jtherbio.2012.12.005
---------- MLA ----------
Stellatelli, O.A., Vega, L.E., Block, C., Cruz, F.B. "Effects on the thermoregulatory efficiency of two native lizards as a consequence of the habitat modification by the introduction of the exotic tree Acacia longifolia" . Journal of Thermal Biology, vol. 38, no. 3, 2013, pp. 135-142.
http://dx.doi.org/10.1016/j.jtherbio.2012.12.005
---------- VANCOUVER ----------
Stellatelli, O.A., Vega, L.E., Block, C., Cruz, F.B. Effects on the thermoregulatory efficiency of two native lizards as a consequence of the habitat modification by the introduction of the exotic tree Acacia longifolia. J. Therm. Biol. 2013;38(3):135-142.
http://dx.doi.org/10.1016/j.jtherbio.2012.12.005