|
|
Teplotní adaptace trávicích enzymů želvušek žijících v trvale chladném prostředí
JOZIĆ, Nikola
This thesis presents a literature review of the phylum Tardigrada, exploring the impact of cold temperatures on living organisms in general and focusing on adaptations of organisms to cold and freezing, particularly in terms of enzymatic adaptations. The experimental part of this work involves comparing the enzymatic activity of the -glucosidase enzyme in tardigrades from Arctic glacier (Svalbard) and soil tardigrades from a temperate climate (Czech Republic) at different temperatures. The results showed higher enzymatic activity in tardigrades from a temperate climate at all measured temperatures, suggesting that the enzymes of glacier dwelling tardigrades are not cold adapted.
|
|
|
Adaptation for Low Temperature Survival and Taxonomic Diversity of Invertebrates in a Snow Environment.
Babůrek, Jan ; Říhová, Dagmar (advisor) ; Pavlíková, Anežka (referee)
Title: Adaptation for Low Temperature Survival and Taxonomic Diversity of Invertebrates in a Snow Environment. Abstract: This bachelor thesis represents a review of contemporary knowledge concerning cold hardiness and activity in a snow environment in invertebrates. The first part is focused on the influence of cold on the organisms and strategies of survival in cold environments. The following chapter represents a description of substances (e.g. ice nucleating agents, cryoprotectants, antifreeze proteins or water) participating in a level of cold hardiness. Diapause is mentioned as well, as it can influence cold hardiness. Moreover, adaptations to living in cold environment are discussed from an evolutionary point of view with emphasis on the specificity of survival strategies depending on the climate. The final chapter focuses on animal taxa which remain active in a snow environment. Organisms active in the winter environment of temperate climate as well as nival fauna of regions with permanent snow are included. This chapter also contains a list of invertebrate taxa occurring on snow cover with notes to their ecology and phenology. Key words: cold hardiness, cold adaptations, nival fauna, winter survival, invertebrate animals
|
|
|
Adaptation for Low Temperature Survival and Taxonomic Diversity of Invertebrates in a Snow Environment.
Babůrek, Jan ; Říhová, Dagmar (advisor) ; Pavlíková, Anežka (referee)
Title: Adaptation for Low Temperature Survival and Taxonomic Diversity of Invertebrates in a Snow Environment. Abstract: This bachelor thesis represents a review of contemporary knowledge concerning cold hardiness and activity in a snow environment in invertebrates. The first part is focused on the influence of cold on the organisms and strategies of survival in cold environments. The following chapter represents a description of substances (e.g. ice nucleating agents, cryoprotectants, antifreeze proteins or water) participating in a level of cold hardiness. Diapause is mentioned as well, as it can influence cold hardiness. Moreover, adaptations to living in cold environment are discussed from an evolutionary point of view with emphasis on the specificity of survival strategies depending on the climate. The final chapter focuses on animal taxa which remain active in a snow environment. Organisms active in the winter environment of temperate climate as well as nival fauna of regions with permanent snow are included. This chapter also contains a list of invertebrate taxa occurring on snow cover with notes to their ecology and phenology. Key words: cold hardiness, cold adaptations, nival fauna, winter survival, invertebrate animals
|
guest ::
