Search Results - "Worland, M. Roger"

How insects survive the cold: molecular mechanisms--a review by Clark, Melody S, Worland, M. Roger

“…Insects vary considerably in their ability to survive low temperatures. The tractability of these organisms to experimentation has lead to considerable…”
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The non-native chironomid Eretmoptera murphyi in Antarctica: erosion of the barriers to invasion by Hughes, Kevin A., Worland, M. Roger, Thorne, Michael A. S., Convey, Peter

“…Antarctica is the continent least affected by invasive species, but climate change and increasing human activity are increasing this threat. Antarctic…”
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Diapause induces remodeling of the fatty acid composition of membrane and storage lipids in overwintering larvae of Ostrinia nubilalis, Hubn. (Lepidoptera: Crambidae) by Vukašinović, Elvira L., Pond, David W., Worland, M. Roger, Kojić, Danijela, Purać, Jelena, Popović, Željko D., Grubor-Lajšić, Gordana

“…Seasonal changes in the FA composition of triacylglycerols and phospholipids prepared from the whole bodies of non-diapausing and diapausing fifth instar…”
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Surviving the cold: molecular analyses of insect cryoprotective dehydration in the Arctic springtail Megaphorura arctica (Tullberg) by Clark, Melody S, Thorne, Michael As, Purać, Jelena, Burns, Gavin, Hillyard, Guy, Popović, Zeljko D, Grubor-Lajsić, Gordana, Worland, M Roger

“…Insects provide tractable models for enhancing our understanding of the physiological and cellular processes that enable survival at extreme low temperatures…”
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Acclimation effects on thermal tolerances of springtails from sub-Antarctic Marion Island: Indigenous and invasive species by Slabber, Sarette, Roger Worland, M., Petter Leinaas, Hans, Chown, Steven L.

“…Collembola are abundant and functionally significant arthropods in sub-Antarctic terrestrial ecosystems, and their importance has increased as a consequence of…”
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Surviving extreme polar winters by desiccation: clues from Arctic springtail (Onychiurus arcticus) EST libraries by Clark, Melody S, Thorne, Michael As, Purać, Jelena, Grubor-Lajsić, Gordana, Kube, Michael, Reinhardt, Richard, Worland, M Roger

“…Ice, snow and temperatures of -14 degrees C are conditions which most animals would find difficult, if not impossible, to survive in. However this exactly…”
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Soil properties of an Antarctic inland site: implications for ecosystem development by Engelen, Andreas, Convey, Peter, Hodgson, Dominic A., Roger Worland, M., Ott, Sieglinde

“…Inland Antarctic nunataks typically have simple physically weathered soils and limited ecosystem complexity. In this paper we present quantitative measurements…”
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Inhibitory effects of climate change on the growth and extracellular enzyme activities of a widespread Antarctic soil fungus by Misiak, Marta, Goodall‐Copestake, William P., Sparks, Tim H., Worland, M. Roger, Boddy, Lynne, Magan, Naresh, Convey, Peter, Hopkins, David W., Newsham, Kevin K.

“…Temperatures approaching or exceeding 20°C have been measured during summer in polar regions at the surfaces of barren fellfield soils under cloudless skies…”
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Ecology of moss banks on Signy Island (maritime Antarctic) by Cannone, Nicoletta, Dalle Fratte, Michele, Convey, Peter, Worland, M. Roger, Guglielmin, Mauro

“…Abstract Mosses are dominant components of high-latitude environments, and Signy Island (maritime Antarctic) provides a representative example of polar…”
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Responses of invertebrates to temperature and water stress: A polar perspective by Everatt, Matthew J., Convey, Pete, Bale, Jeffrey S., Worland, M. Roger, Hayward, Scott A.L.

“…As small bodied poikilothermic ectotherms, invertebrates, more so than any other animal group, are susceptible to extremes of temperature and low water…”
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Potential role of hydrogen peroxide and melanin in the cold hardiness of Ostrinia nubilalis (Lepidoptera: Pyralidae) by Danijela KOJIC, Ivan SPASOJEVIC, Miloš MOJOVIC, Duško BLAGOJEVIC, M. WORLAND, Gordana GRUBOR-LAJSIC, Mihajlo B. SPASIC

“…The aim of this study was to investigate the relationship between antioxidant enzymes and reactive oxygen species production in diapausing larvae of the…”
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Temperature adaptation of lipids in diapausing Ostrinia nubilalis: an experimental study to distinguish environmental versus endogenous controls by Vukašinović, Elvira L., Pond, David W., Grubor-Lajšić, Gordana, Worland, M. Roger, Kojić, Danijela, Purać, Jelena, Popović, Željko D., Blagojević, Duško P.

“…Larvae of the European corn borer ( Ostrinia nubilalis Hubn.) were cold acclimated during different phases of diapause to determine if changes in the fatty…”
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Factors that influence freezing in the sub-Antarctic springtail Tullbergia antarctica by Worland, M. Roger

“…Effects of 12 biotic and abiotic factors on the freezing point of the sub-Antarctic springtail, Tullbergia antarctica, were investigated. Repeated cooling of…”
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The ice nucleation activity of extremophilic algae by Kviderova, Jana, Hajek, Josef, Worland, Roger M

“…Differences in the level of cold acclimation and cryoprotection estimated as ice nucleation activity in snow algae (Chlamydomonas cf. nivalis and Chloromonas…”
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Cold hardening processes in the Antarctic springtail, Cryptopygus antarcticus: Clues from a microarray by Purać, Jelena, Burns, Gavin, Thorne, Michael A.S., Grubor-Lajšić, Gordana, Worland, M. Roger, Clark, Melody S.

“…The physiology of the Antarctic microarthropod, Cryptopygus antarcticus, has been well studied, particularly with regard to its ability to withstand low winter…”
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HYDROGEN PEROXIDE AND ECDYSONE IN THE CRYOPROTECTIVE DEHYDRATION STRATEGY OF Megaphorura Arctica (ONYCHIURIDAE: COLLEMBOLA) by Grubor-Lajšić, Gordana, Petri, Edward T., Kojić, Danijela, Purać, Jelena, Popović, Željko D., Worland, Roger M., Clark, Melody S., Mojović, Miloš, Blagojević, Duško P.

“…The Arctic springtail, Megaphorura arctica, survives sub‐zero temperatures in a dehydrated state via trehalose‐dependent cryoprotective dehydration. Regulation…”
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Desiccation stress at sub-zero temperatures in polar terrestrial arthropods by Worland, M.Roger, Block, William

“…Cold tolerant polar terrestrial arthropods have evolved a range of survival strategies which enable them to survive the most extreme environmental conditions…”
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Pre-freeze mortality in three species of aphids from sub-Antarctic Marion Island by Roger Worland, M., Janion, Charlene, Treasure, Anne M., Chown, Steven L.

“…Understanding the mechanisms by which aphids survive low temperature is fundamental in forecasting the risk of pest outbreaks. Aphids are chill susceptible and…”
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Habitat moisture availability and the local distribution of the Antarctic Collembola Cryptopygus antarcticus and Friesea grisea by Hayward, Scott A.L, Roger Worland, M, Convey, Pete, Bale, Jeff S

“…Population densities of the Collembola Cryptopygus antarcticus and Friesea grisea were compared in two maritime Antarctic habitats with different moisture…”
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The effect of feeding on specific soil algae on the cold-hardiness of two Antarctic micro-arthropods (Alaskozetes antarcticus and Cryptopygus antarcticus) by WORLAND, M. Roger, LUKESOVA, Alena

“…The effect of consuming terrestrial algae on the cold tolerance of two Antarctic micro-arthropods was examined. From the results of preferential feeding…”
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