Avian Adaptations to Deserts of the Northern and Southern Hemispheres: a Comparison
MetadataShow full item record
Ecologically, arid regions can be classified as temperate and hot,and arid or semiarid. The avifaunas of temperate arid and semiarid zones are subjected to seasonally-extreme temperature fluctuations, that necessitate (a) seasonal breeding and (b) a high incidence of migration. Such zones occur at high latitudes and high altitudes. Seasonal breeding is also a feature of birds inhabiting hot hyperarid regions such as the Namib and Atacama Deserts, where environmental cues other than photoperiod are largely absent and therefore irrelevant. Birds of hot deserts, although subject to erratic rainfall regimes,are usually able to capitalise on precipitation as a cue for breeding activity at any time of the year,although retaining an innate response to photoperiod under conditions of abundant food supply. The hot deserts of the northern hemisphere are nevertheless more seasonally variable than those of the southern hemisphere. Northern avifaunas therefore show characteristics that are more similar to those of temperate-desert avifaunas than to those of the southern hemisphere.
Originally published as:
Curtin University of Technology
Bulletin Number 17
ISSN 0158 3301
Showing items related by title, author, creator and subject.
Solar ultraviolet radiation and ozone depletion-driven climate change: Effects on terrestrial ecosystemsBornman, Janet; Barnes, P.; Robinson, S.; Ballare, C.; Flint, S.; Caldwell, M. (2015)In this assessment we summarise advances in our knowledge of how UV-B radiation (280-315 nm), together with other climate change factors, influence terrestrial organisms and ecosystems. We identify key uncertainties and ...
Davies, Stephen; Kenny, S. (2013)Since 1960, 22 species of individually marked, arid-zone perennial plants in the Murchison District and Gibson Desert of Western Australia have been monitored for flowering, fecundity, and survival. The age to which ...
Phenological changes of oceanic phytoplankton in the 1980s and 2000s as revealed by remotely sensed ocean-color observationsD’Ortenzio, F.; Antoine, David; Martinez, E.; Ribera d’Alcalà, M. (2012)We investigated the phenology of oceanic phytoplankton at large scales over two 5-year time periods: 1979–1983 and 1998–2002. Two ocean-color satellite data archives (Coastal Zone Color Scanner (CZCS) and Sea-viewing Wide ...