Now showing items 1-10 of 29
Temperature- and body mass-related variation in cyclic gas exchange characteristics and metabolic rate of seven species: Broader implications
(PERGAMON-ELSEVIER SCIENCE LTD, 2005-07-01)
The influence of temperature on metabolic rate and characteristics of the gas exchange patterns of flightless, sub-Antarctic Ectemnorhinus-group species from Heard and Marion islands was investigated. All of the species ...
Climatic variability and hemispheric differences in insect cold tolerance: support from southern Africa
(BLACKWELL PUBLISHING, 2005-04-01)
1. Insects generally survive subzero temperatures by utilizing either freeze tolerance or freeze avoidance. Comparative analyses from a limited data set have indicated that freeze tolerance may be predominant among species ...
Protected areas and regional avian species richness in South Africa
(ROYAL SOCIETY, 2006-06-22)
Protected areas are generally regarded as essential for the long-term maintenance of biodiversity. Evidence for their effectiveness in this regard is, however, somewhat equivocal. Here, we document the relationship between ...
The microarthropods of Prince Edward Island: A quantitative assessment
The biodiversity in the sub-Antarctic region is threatened by climatic change and biological invasions, which makes the understanding of distributions of biotas on sub-Antarctic islands essential. Although the distribution ...
Neutrality and the niche
(BLACKWELL PUBLISHING LTD, 2005-02)
Phenotypic plasticity of thermal tolerances in five oribatid mite species from sub-Antarctic Marion Island
(PERGAMON-ELSEVIER SCIENCE LTD, 2006-07)
The extent to which phenotypic plasticity might mediate short-term responses to environmental change is controversial. Nonetheless, theoretical work has made the prediction that plasticity should be common, especially in ...
Gas exchange characteristics, metabolic rate and water loss of the Heelwalker, Karoophasma biedouwensis (Mantophasmatodea : Austrophasmatidae)
(PERGAMON-ELSEVIER SCIENCE LTD, 2006-05)
This study presents the first physiological information for a member of the wingless Mantophasmatodea, or Heelwalkers. This species shows cyclic gas exchange with no evidence of a Flutter period (more typical of discontinuous ...
Linking molecular physiology to ecological realities
(UNIV CHICAGO PRESS, 2006-04)
Although molecular physiology and ecology have drifted apart as a consequence of early separation in the questions posed and techniques used, there is a resurgence of interest in forging links between them. Here we explore ...
Phenotypic plasticity and geographic variation in thermal tolerance and water loss of the tsetse Glossina pallidipes (Diptera: Glossinidae): implications for distribution modelling
Using the tsetse, Glossina pallidipes, we show that physiologic plasticity (resulting from temperature acclimation) accounts for among-population variation in thermal tolerance and water loss rates. Critical thermal ...
Human impacts, energy availability and invasion across Southern Ocean Islands
(BLACKWELL PUBLISHING, 2005-11)
Aim Ongoing biological invasions will enhance the impacts of humans on biodiversity. Nonetheless, the effects of exotic species on diversity are idiosyncratic. Increases in diversity might be a consequence of similar ...