Data from: Lizards in the mist: thermal niches constrained by habitat and microclimates in the Andes of southern Bolivia
Data files
Jul 10, 2020 version files 32.68 MB
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degreeMinutes.R
6.33 KB
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HertzFunctions.R
1.80 KB
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Lizards in the mist. Script 1. Summary of thermal thresholds of activity.R
20.25 KB
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Lizards in the mist. Script 2. Calculating activity and restriction times.R
34.87 KB
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Lizards in the mist. Script 3. GLMs for activity and restriction time.R
20.83 KB
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Lizards in the mist. Script 4. Organising survey and transect data.R
22.27 KB
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Lizards in the mist. Script 5. ZIGLMMs for abundances of lizards.R
30.83 KB
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LizardsSurveys.csv
39.51 KB
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mountain_divide.zip
50.03 KB
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PhysiologyData.csv
35.62 KB
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README.txt
6 KB
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Substrate_Heterogeneity.csv
17.26 KB
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TeSam2012.csv
19.50 MB
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TeSam2013.csv
12.85 MB
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TevsTbCalibrations.csv
36.85 KB
Jul 19, 2019 version files 65.36 MB
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degreeMinutes.R
6.33 KB
-
HertzFunctions.R
1.80 KB
-
Lizards in the mist. Script 1. Summary of thermal thresholds of activity.R
20.25 KB
-
Lizards in the mist. Script 2. Calculating activity and restriction times.R
34.87 KB
-
Lizards in the mist. Script 3. GLMs for activity and restriction time.R
20.83 KB
-
Lizards in the mist. Script 4. Organising survey and transect data.R
22.27 KB
-
Lizards in the mist. Script 5. ZIGLMMs for abundances of lizards.R
30.83 KB
-
LizardsSurveys.csv
39.51 KB
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mountain_divide.zip
50.03 KB
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PhysiologyData.csv
35.62 KB
-
README.txt
6 KB
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Substrate_Heterogeneity.csv
17.26 KB
-
TeSam2012.csv
19.50 MB
-
TeSam2013.csv
12.85 MB
-
TevsTbCalibrations.csv
36.85 KB
Abstract
Aim: To understand how the activity budgets of ectotherms vary in mountain areas with high microclimatic and habitat heterogeneity, and how these factors together with habitat modulate the assemblage of ectotherm communities.
Location; Tajzara Basin, Cordillera de Sama (3600–4300 masl), Department of Tarija, Bolivia.
Taxon: four lizard species of the genus Liolaemus.
Methods: After parameterizing the thermal physiology of each species and recording operative temperature time series with dataloggers, we calculated activity budgets for every species across 30 sampling sites. By multimodel inference we evaluated how activity budgets varied across the topography. We also assessed how abundances of each species were predicted by activity budgets, restriction time, temperature deviation, habitat covers and exposure to cold microclimate.
Results: Activity budgets were not only influenced by elevation, but also by the exposure to cold air that comes through saddles from the eastern side of the mountain divide. Although thermal physiological parameters were relatively similar among the species, their abundances were conditioned to different extents by activity budgets, habitat and microclimates.
Main conclusions: The abundance and distribution of each species across these lizard communities reflect the microclimatic heterogeneity originated by complex topography, which uncouples activity budgets from elevation. Only one species was confined to cold microclimate refugia with higher exposure to Föhn effect. Despite having relatively similar thermal aspect of fundamental niches, lizards may differ in their realized niches by habitat selection. Habitat specialization could compromise the persistence of some species under global warming by reducing the dispersal possibilities to certain areas where population sustainability might be impaired in the long term. Understanding the heterogeneity of microclimates and habitats and the physiology of the species partially explains their distribution at local scale, and provides insights on how to best confront upcoming climate change effects.