PMID- 21708695 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20121002 LR - 20200930 IS - 1540-7063 (Print) IS - 1540-7063 (Linking) VI - 42 IP - 1 DP - 2002 Feb TI - Ecological and evolutionary physiology of desert birds: a progress report. PG - 68-75 LID - 10.1093/icb/42.1.68 [doi] AB - The adaptive significance of mechanisms of energy and water conservation among species of desert rodents, which avoid temperature extremes by remaining within a burrow during the day, is well established. Conventional wisdom holds that arid-zone birds, diurnal organisms that endure the brunt of their environment, occupy these desert climates because of the possession of physiological design features common to all within the class Aves. We review studies that show that desert birds may have evolved specific features to deal with hot desert conditions including: a reduced basal metabolic rate (BMR) and field metabolic rate (FMR), and lower total evaporative water loss (TEWL) and water turnover (WTO).Previous work on the comparative physiology of desert birds relied primarily on information gathered on species from the deserts of the southwestern U.S., which are semi-arid habitats of recent geologic origin. We include data on species from Old World deserts, which are geologically older than those in the New World, and place physiological responses along an aridity axis that includes mesic, semi-arid, arid, and hyperarid environments.The physiological differences between desert and mesic birds that we have identified using the comparative method could arise as a result of acclimation to different environments, of genetic change mediated by selection, or both. We present data on the flexibility of BMR and TEWL in Hoopoe Larks that suggest that phenotypic adjustments in these variables can be substantial. Finally, we suggest that linkages between the physiology of individual organism and its life-history are fundamental to the understanding of life-history evolution. FAU - Williams, Joseph B AU - Williams JB AD - Department of Evolution, Ecology, and Organismal Biology, Ohio State University, 1735 Neil Ave, Columbus, Ohio 43210. FAU - Tieleman, B Irene AU - Tieleman BI LA - eng PT - Journal Article PL - England TA - Integr Comp Biol JT - Integrative and comparative biology JID - 101152341 EDAT- 2002/02/01 00:00 MHDA- 2002/02/01 00:01 CRDT- 2011/06/29 06:00 PHST- 2011/06/29 06:00 [entrez] PHST- 2002/02/01 00:00 [pubmed] PHST- 2002/02/01 00:01 [medline] AID - 42/1/68 [pii] AID - 10.1093/icb/42.1.68 [doi] PST - ppublish SO - Integr Comp Biol. 2002 Feb;42(1):68-75. doi: 10.1093/icb/42.1.68.