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Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

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Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
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rTPI: An R Package for Calculating Thermal and Aridity Position Indices for Terrestrial Vertebrates.

Matthew J Watson1, Jeremy T Kerr1

  • 1Department of Biology University of Ottawa Ottawa Ontario Canada.

Ecology and Evolution
|April 6, 2026
PubMed
Summary

The rTPI package offers niche limits for terrestrial vertebrates, aiding climate change response studies. It calculates Thermal Position Index (TPI) and Aridity Position Index (API) for ecological modeling.

Keywords:
aridity nicheniche limitsniche positionterrestrial vertebratesthermal niche

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Area of Science:

  • Ecology
  • Climate Change Biology
  • Bioinformatics

Background:

  • Species environmental niche limits are crucial for understanding ecological responses.
  • Previous models integrating species-specific thermal and aridity niche positions showed improved performance in climate change studies.
  • A lack of accessible data for thermal and aridity niche limits and positions hindered broad application.

Purpose of the Study:

  • To address the scarcity of thermal and aridity niche limit data for a wide range of species.
  • To introduce the rTPI package, providing access to realized niche tolerance limits and estimation capabilities.
  • To enable the calculation of Thermal Position Index (TPI) and Aridity Position Index (API) for assessing species proximity to niche limits.

Main Methods:

  • Developed the rTPI R package.
  • Compiled a dataset of realized thermal and aridity niche tolerance limits for terrestrial birds, mammals, reptiles, and amphibians.
  • Implemented functions to estimate niche limits and calculate TPI and API.

Main Results:

  • The rTPI package provides access to niche tolerance limits for numerous terrestrial vertebrate species.
  • Users can generate species-specific thermal and aridity niche limit estimates.
  • The package facilitates the calculation of TPI and API, quantifying species' positions relative to their niche limits.

Conclusions:

  • The rTPI package offers a valuable resource for ecological research, particularly in climate change studies.
  • Accessible niche limit data and TPI/API calculations enhance the ability to model species' responses to environmental changes.
  • The package supports a wide array of ecological questions by providing straightforward access to crucial niche data for terrestrial vertebrates.