Search for dissertations about: "thermal responses"

Showing result 1 - 5 of 87 swedish dissertations containing the words thermal responses.

2. 1. Adjusting to the extreme : Thermal adaptation in a freshwater gastropod

   Author : Magnus Johansson; Laurila Anssi; Robby Stoks; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Radix balthica; Lake Mývatn; geothermal springs; thermal adaptation; isolation by environment; population structure; gene flow; cogradient variation; AFLP; thermal preference; CTmax; Biologi med inriktning mot populationsbiologi; Biology with specialization in Population Biology;

   Abstract : Temperature is a ubiquitous force influencing biological processes ranging from cellular responses to life span. The thermal environment for many organisms is predicted to change with globally increasing temperatures and studies conducted in natural systems incorporating various evolutionary forces, such as gene flow, is needed. READ MORE

4. 2. Thermal adaptation along a latitudinal gradient in damselflies

   Author : Viktor Nilsson-Örtman; Frank Johansson; Karl Gotthard; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Growth rate; metabolic theory of ecology; universal temperature dependence; environmental gradients; thermal performance; thermal sensitivity; environmental variability; optimality theory; life history; acclimation; size structure; competition; cannibalism; intraguild predation;

   Abstract : Understanding how temperature affects biological systems is a central question in ecology and evolutionary biology. Anthropogenic climate change adds urgency to this topic, as the demise or success of species under climate change is expected to depend on how temperature affects important aspects of organismal performance, such as growth, development, survival and reproduction. READ MORE

5. 3. Temperature variation in time and space, and its effects on insects

   Author : Loke von Schmalensee; Philipp Lehmann; Gotthard Karl; Michael Angilletta; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; temperature variation; thermal performance; insects; Lepidoptera; thermal adaptation; thermal ecology; microclimate; seasonality; zoologisk ekologi; Animal Ecology;

   Abstract : Nature is variable. Unfortunately, compressed representations of this variable world, like averages, are often lossy and insufficient for ecological purposes. This is particularly true for temperature variation, which organisms typically respond to in a nonlinear way. READ MORE

6. 4. Modelling impact climate-related change on the thermal responses of lakes

   Author : Ana I. Ayala; Donald C. Pierson; Stéphane Goyette; Andreas Lorke; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Modelling; climate change; lakes; thermal structure; surface heat fluxes; extreme events;

   Abstract : In response to climate-related changes, lakes worldwide have experienced warmer surface water temperatures, shorter ice cover periods and changes in lake stratification. As these aspects of lake dynamics exert substantial control over nutrient availability, oxygenation and biogeochemical cycling, predicting changes in lake water temperature and stratification dynamics can improve our understanding of the consequences of warming on lake ecosystems. READ MORE

7. 5. From behaviour to genes: anti-predator responses of brown trout (Salmo trutta) under winter conditions

   Author : Karl Filipsson; Eva Bergman; Ann Erlandsson; Martin Österling; Johan Watz; Stefán Óli Steingrímsson; Karlstads universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; burbot; climate change; cortisol; diel behaviour; gene expression; HPI axis; light; mRNA; piscivorous; poikilotherm; predator; salmonid; stream; stress; temperature; thermal; winter behaviour; Biology; Biologi;

   Abstract : Temperature has major effects on the performance of poikilotherms. In encounters with predators, low winter temperatures constrain predator detection and escape capabilities in prey fishes. READ MORE