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
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...
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2013
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03064565_v38_n3_p135_Stellatelli http://hdl.handle.net/20.500.12110/paper_03064565_v38_n3_p135_Stellatelli |
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paper:paper_03064565_v38_n3_p135_Stellatelli2023-06-08T15:31:23Z 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 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 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. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03064565_v38_n3_p135_Stellatelli http://hdl.handle.net/20.500.12110/paper_03064565_v38_n3_p135_Stellatelli |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 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 |
| topic_facet |
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 |
| description |
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. |
| title |
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 |
| title_short |
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 |
| title_full |
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 |
| title_fullStr |
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 |
| title_full_unstemmed |
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 |
| title_sort |
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 |
| publishDate |
2013 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03064565_v38_n3_p135_Stellatelli http://hdl.handle.net/20.500.12110/paper_03064565_v38_n3_p135_Stellatelli |
| _version_ |
1768545555956367360 |