Search for dissertations about: "lake littoral"

Showing result 11 - 15 of 20 swedish dissertations containing the words lake littoral.

2. 11. Studies on the Life Cycles of Akinete Forming Cyanobacteria

   Author : Irene Karlsson Elfgren; Kurt Pettersson; Peter Blomqvist; Tore Lindholm; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; limnology; akinete; germination; recruitment; Biologi; Biology; Biologi; limnologi; Limnology;

   Abstract : Cyanobacteria which can form resting cells (in this case akinetes) are common in meso-eutrophic lakes in temperate regions, often dominating the phytoplankton communities during summer. The life cycles of akinete-forming cyanobacteria has been studied with Gloeotrichia echinulata as a model organism. READ MORE

4. 12. Fish population responses to climate change : Causes and consequences

   Author : Matilda L. Andersson; Peter Eklöv; Brian Hayden; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; browning; climate change; DOC; intraspecific variation; metabolism; resource use; warming;

   Abstract : Lake environments are heterogeneous, and animals show a variety of adaptations to deal with this heterogeneity. Fish often show intraspecific variation in diet, metabolism, and behavior, corresponding to their habitat use. READ MORE

5. 13. Methane dynamics in northern lakes : Insights from multi-scale observations

   Author : Jonathan Schenk; David Bastviken; Magnus Gålfalk; Damien Maher; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Methane; Lakes; Variability; Sampling design; Models;

   Abstract : Methane (CH4) is a potent greenhouse gas which is emitted to the atmosphere from both natural and anthropogenic sources. Current evidence indicates that lakes account for a large part of the global emissions of CH4, but their contribution is difficult to quantify because of large temporal and spatial variability in processes leading to CH4 fluxes from lakes to the atmosphere. READ MORE

6. 14. Ecology and Evolution of Adaptive Morphological Variation in Fish Populations

   Author : Richard Svanbäck; Peter Eklöv; Lennart Persson; Beren Robinson; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; competition; functional morphology; individual specialization; inter-individual variation; intra-population variation; morphological variation; ontogeny; Perca fluviatilis; perch; phenotypic plasticity; predation; trade-offs; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

   Abstract : The work in this thesis deals with the ecology and evolution of adaptive individual variation. Ecologists have long used niche theory to describe the ecology of a species as a whole, treating conspecific individuals as ecological equivalent. READ MORE

7. 15. Species distribution models : ecological applications for management of biodiversity

   Author : Simon Hallstan; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : Species distribution models are a group of methods often used to estimate consequences of global change, to assess ecological status and for other ecological applications. The main idea behind species distribution models is that the geographical distributions of species can, to a large part, be explained by environmental factors and that species distributions therefore can be predicted in time or space. READ MORE