التفاصيل البيبلوغرافية
| العنوان: |
Data for: Evolution of avian heat tolerance: The role of atmospheric humidity |
| المؤلفون: |
Freeman, Marc, Coulson, Bianca, Short, James, Ngcamphalala, Celiwe, Makola, Mathome, McKechnie, Andrew |
| بيانات النشر: |
Zenodo |
| سنة النشر: |
2024 |
| المجموعة: |
Zenodo |
| مصطلحات موضوعية: |
bird, endotherm, Evaporative water loss, heat tolerance limit, Humidity, Body temperature, Hyperthermia, thermoregulation |
| الوصف: |
The role of atmospheric humidity in the evolution of endotherms' thermoregulatory performance remains largely unexplored, despite elevated atmospheric humidity being known to impede evaporative cooling capacity. Using a phylogenetically informed comparative framework, we tested the hypothesis that pronounced hyperthermia tolerance among birds occupying humid lowlands evolved to reduce the impact of humidity-impeded scope for evaporative heat dissipation by comparing heat tolerance limits (HTL; maximum tolerable air temperature), maximum body temperatures ( T b max ) and associated thermoregulatory variables in humid (19.2 g H 2 O m − 3 ) versus dry (1.1 g H 2 O m − 3 ) air among 30 species from three climatically distinct sites (arid, mesic montane and humid lowland). Humidity-associated decreases in evaporative water loss and resting metabolic rate were 27 - 38% and 21 - 27%, respectively, and did not differ significantly between climatic sites. Decreases in heat tolerance limits were significantly larger among arid-zone (mean ± SD = 3.13 ± 1.12 °C) and montane species (2.44 ± 1.0 °C) compared to lowland species (1.23 ± 1.34 °C), with more pronounced hyperthermia among lowland ( T b max = 46.26 ± 0.48°C) and montane birds ( T b max = 46.19 ± 0.92°C) compared to arid-zone species (45.23 ± 0.24°C). Our findings reveal a functional link between facultative hyperthermia and humidity-related constraints on evaporative cooling, providing novel insights into how hygric and thermal environments interact to constrain avian performance during hot weather. Moreover, the macrophysiological patterns we report provide further support for the concept of a continuum from thermal specialization to thermal generalization among endotherms, with adaptive variation in body temperature correlated with prevailing climatic conditions. ; Funding provided by: National Research Foundation Crossref Funder Registry ID: https://ror.org/05s0g1g46 Award Number: 119754 ; Materials and Methods Study areas We collected data at three climatically ... |
| نوع الوثيقة: |
other/unknown material |
| اللغة: |
unknown |
| Relation: |
https://zenodo.org/communities/dryad; https://doi.org/10.5061/dryad.pg4f4qrxb; oai:zenodo.org:10656032 |
| DOI: |
10.5061/dryad.pg4f4qrxb |
| الاتاحة: |
https://doi.org/10.5061/dryad.pg4f4qrxb |
| Rights: |
info:eu-repo/semantics/openAccess ; Creative Commons Zero v1.0 Universal ; https://creativecommons.org/publicdomain/zero/1.0/legalcode |
| رقم الانضمام: |
edsbas.AB2D8E0A |
| قاعدة البيانات: |
BASE |