Global warming and avian occupancy of hot deserts: a physiological and behavioral perspective

Avian adjustments to desert environments are characterized by an integration of behavior and physiology. These responses serve to maintain homeostasis and conserve vital resources such as water. The small size of birds confers a close coupling to the thermal environment and demands rapid adjustments...

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Autor principal:	WOLF,BLAIR
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2000
Materias:	global warming hot deserts birds water balance evaporative water loss avian distribution
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300003
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spelling	oai:scielo:S0716-078X20000003000032000-11-09Global warming and avian occupancy of hot deserts: a physiological and behavioral perspectiveWOLF,BLAIR global warming hot deserts birds water balance evaporative water loss avian distribution Avian adjustments to desert environments are characterized by an integration of behavior and physiology. These responses serve to maintain homeostasis and conserve vital resources such as water. The small size of birds confers a close coupling to the thermal environment and demands rapid adjustments to environmental challenges. Physiological responses to heat stress include hyperthermia, and increased evaporative cooling as environmental temperatures approach body temperature. Behaviorally, desert birds respond to heat stress by drastically reducing activity during the hottest parts of the day and selecting cool shaded microsites. This characteristic behavioral response presents a potential problem in the face of global warming. If birds totally forgo foraging during extremely hot periods, increased evaporative water loss rates due to higher environmental temperatures could lead to significant episodes of direct mortality for birds in these regions. A simple model is presented which integrates behavior and physiology to predict survival times based on dehydration tolerance, microsite selection and environmental temperature.info:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.73 n.3 20002000-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300003en10.4067/S0716-078X2000000300003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	global warming hot deserts birds water balance evaporative water loss avian distribution
spellingShingle	global warming hot deserts birds water balance evaporative water loss avian distribution WOLF,BLAIR Global warming and avian occupancy of hot deserts: a physiological and behavioral perspective
description	Avian adjustments to desert environments are characterized by an integration of behavior and physiology. These responses serve to maintain homeostasis and conserve vital resources such as water. The small size of birds confers a close coupling to the thermal environment and demands rapid adjustments to environmental challenges. Physiological responses to heat stress include hyperthermia, and increased evaporative cooling as environmental temperatures approach body temperature. Behaviorally, desert birds respond to heat stress by drastically reducing activity during the hottest parts of the day and selecting cool shaded microsites. This characteristic behavioral response presents a potential problem in the face of global warming. If birds totally forgo foraging during extremely hot periods, increased evaporative water loss rates due to higher environmental temperatures could lead to significant episodes of direct mortality for birds in these regions. A simple model is presented which integrates behavior and physiology to predict survival times based on dehydration tolerance, microsite selection and environmental temperature.
author	WOLF,BLAIR
author_facet	WOLF,BLAIR
author_sort	WOLF,BLAIR
title	Global warming and avian occupancy of hot deserts: a physiological and behavioral perspective
title_short	Global warming and avian occupancy of hot deserts: a physiological and behavioral perspective
title_full	Global warming and avian occupancy of hot deserts: a physiological and behavioral perspective
title_fullStr	Global warming and avian occupancy of hot deserts: a physiological and behavioral perspective
title_full_unstemmed	Global warming and avian occupancy of hot deserts: a physiological and behavioral perspective
title_sort	global warming and avian occupancy of hot deserts: a physiological and behavioral perspective
publisher	Sociedad de Biología de Chile
publishDate	2000
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300003
work_keys_str_mv	AT wolfblair globalwarmingandavianoccupancyofhotdesertsaphysiologicalandbehavioralperspective
_version_	1718439484607954944

Global warming and avian occupancy of hot deserts: a physiological and behavioral perspective

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