Thermal ecology and structural habitat use of two sympatric lizards (Carlia vivax and Lygisaurus foliorum) in subtropical Australia

Singh, Sarinda, Smyth, Anita K. and Blomberg, Simon P. (2002) Thermal ecology and structural habitat use of two sympatric lizards (Carlia vivax and Lygisaurus foliorum) in subtropical Australia. Austral Ecology, 27 6: 616-623. doi:10.1046/j.1442-9993.2002.01222.x


Author Singh, Sarinda
Smyth, Anita K.
Blomberg, Simon P.
Title Thermal ecology and structural habitat use of two sympatric lizards (Carlia vivax and Lygisaurus foliorum) in subtropical Australia
Journal name Austral Ecology   Check publisher's open access policy
ISSN 1442-9985
1442-9993
Publication date 2002-12-01
Sub-type Article (original research)
DOI 10.1046/j.1442-9993.2002.01222.x
Volume 27
Issue 6
Start page 616
End page 623
Total pages 8
Place of publication Carlton
Publisher Blackwell Publishing Asia
Language eng
Subject 270707 Sociobiology and Behavioural Ecology
0602 Ecology
Abstract The thermal ecology and structural habitat use of two closely related sympatric lizards, Carlia vivax (de Vis) and Lygisaurus foliorum de Vis, were examined in an open sclerophyll forest in subtropical Australia. Comparable mean body temperatures (T-b) and habitat temperatures (T-hab) at the point of capture were recorded for both species. However, sex- related differences in the thermal variables for C. vivax, with females displaying higher temperatures than males, resulted in some significant differences in T-b and T-hab between the species. Variation in T-b and T-hab within and between species was unrelated to time of capture. The difference in T-hab within C. vivax suggested that females were selecting warmer thermal environments than males. Both C. vivax and L. foliorum used most structural features of their habitat randomly as indicated by a similarity in canopy, shrub, ground, log and litter cover and litter depth between habitat surveys and random surveys. However, C. vivax displayed a preference for ground vegetation (height <1 m) and litter cover with significantly higher cover recorded where these lizards were captured compared with random surveys. There was no effect of sex on structural habitat used by either species. Thus, the warmer thermal environments selected by female C. vivax may differ from those selected by males in sun/ shade patterns or additional habitat features not measured in the present study. Significant associations between specific habitat features and T-b matched broad habitat descriptions for C. vivax and L. foliorum. This suggests that thermal considerations have direct interactions with the structural habitat preferences of these species. The significant association between T-b and ground cover for C. vivax corresponded with the non- random use of ground cover by this species, whereas L. foliorum utilized all structural features randomly, despite an association between T-b and litter cover. The relative abundance or scarcity of individual structural habitat features may influence whether an association between those features and T-b is reflected in non- random patterns of habitat use.
Keyword Ecology
Body Temperature
Habitat Preferences
Habitat Temperature
Sex Differences
Temperature Regulation
Urosaurus-ornatus
Microhabitat Use
Thermoregulation
Ectotherms
Reptiles
Desert
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Biological Sciences Publications
Ecology Centre Publications
 
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Created: Mon, 13 Aug 2007, 23:16:34 EST