4201 to 4212 of 13906 results
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Terrestrial arthropods and low temperature
Read more of: Terrestrial arthropods and low temperatureCold environments impose several ecological and physiological constraints upon arthropods, including reduction of metabolic rate, locomotory activity, and feeding. These result in slow growth rates and extended life cycles. Additionally, […]
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Low temperature effects on micro-arthropods
Read more of: Low temperature effects on micro-arthropodsThe main features of the cold hardiness strategies adopted by Antarctic terrestrial arthropods (principally Acari and Collembola) are reviewed. These include lethal low temperatures, chill-coma temperature, supercooling ability, cryoprotectants and […]
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Bottom melting under George VI Ice Shelf, Antarctica
Read more of: Bottom melting under George VI Ice Shelf, AntarcticaBottom melting rates have been calculated for a large number of sites on George VI Ice Shelf from measurements of its kinematic behaviour. No simple explanation for the melt-rate pattern […]
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Rb-Sr whole-rock isochron evidence for the age of the Malvern Hills complex
Read more of: Rb-Sr whole-rock isochron evidence for the age of the Malvern Hills complexThe Malvernian igneous complex of the Malvern Hills consists mainlyof plutonic rocks and their locally deformed equivalents. The igneous rocks are calc-alkaline and range from ultra mafic diorite to granite […]
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The blood cells of the Antarctic icefish Chaenocephalus aceratus Lonnberg: light and electron microscopic observations
Read more of: The blood cells of the Antarctic icefish Chaenocephalus aceratus Lonnberg: light and electron microscopic observationsPeripheral blood and haemopoietic tissues of spleen and kidney of the icefish, Chaenocephalus aceratus were examined using LM and EM techniques. The peripheral blood contained cellular elements from all the […]
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Population ecology of a terrestrial isopod in two breckland grass heaths
Read more of: Population ecology of a terrestrial isopod in two breckland grass heaths(1) Two superficially similar chalk grasslands in the Breckland of East Anglia provided very different habitats for the abundant terrestrial isopod Armadillidium vulgare (Latreille). At Lakenheath Warren the site was […]
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Altitudinal gradients in Magellanic sub-Antarctic lagoons: the effect of elevation on freshwater macroinvertebrate diversity and distribution.
Read more of: Altitudinal gradients in Magellanic sub-Antarctic lagoons: the effect of elevation on freshwater macroinvertebrate diversity and distribution.Background. The study of altitudinal gradients provides insights about species diversity, distribution patterns and related drivers. The Magellanic sub-Antarctic ecoregion has a steep elevational gradient, peaking at around 1,000 m […]