Search for dissertations about: "trait based model"

Showing result 1 - 5 of 62 swedish dissertations containing the words trait based model.

2. 1. Function follows Form : Trait-based approaches to climate change effects on wetland vegetation and functioning

   Author : Helen Moor; Jon Norberg; Andrew Gonzalez; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Functional traits; Plant community ecology; Trait distributions; Wetlands; Ecosystem functioning; Ecosystem Services; Climate change; Dispersal; Metacommunity modelling; naturresurshushållning; Natural Resources Management;

   Abstract : Climate change and habitat fragmentation are altering the structure and functioning of plant communities world-wide. Understanding how, why and with what consequences are major challenges of ecology today. Trait-based approaches focus on functional rather than taxonomic identity to facilitate process-based explanation and prediction. READ MORE

4. 2. Food Web Ecology -- individual life-histories and ecological processes shape complex communities

   Author : Martin Hartvig; Evolutionär ekologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; food web; community ecology; community assembly; size-structure; life-history omnivory; ontogeny; trophic interactions; trait based model; topology; emergent organisation; size-spectrum;

   Abstract : This thesis sets out a food web framework for size-structured populations. The framework enables an ecological approach to food web modelling as the individual life-history from birth, through maturation, and ultimately death is explicitly resolved with the use of bioenergetics based on individual body size. READ MORE

5. 3. Evolution of Plants : a mathematical perspective

   Author : Magnus Lindh; Åke Brännström; Jacob Johansson; Mats G Larson; Lennart Persson; Claus Rüffler; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Evolution; plants; mathematics; optimization; optimal control; adaptive dynamics; flowering; seasons; tree crown; drought; taproot; trade-off; strategy; trait; ESS; NPP; LAI; Red Queen; Mathematics; matematik;

   Abstract : The Earth harbors around 300 000 plant species. The rich and complex environment provided by plants is considered a key factor for the extraordinary diversity of the terrestrial fauna by, for example, providing food and shelter. READ MORE

6. 4. Quantitative Trait Evolution in a Changing Environment in a Seed Beetle

   Author : Lára R. Hallsson; Mats Björklund; Derek A. Roff; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantitative trait; genetic variance; environmental change; temperature; seed beetle; sexual dimorphism; plasticity; inheritance; Animal Ecology; Zooekologi;

   Abstract : During the last decades the climate has been changing more rapidly than in the preceding periods. This is for instance characterized by an increase in temperature. Interestingly, such changes in the environment are not necessarily constant over time as they often show high levels of fluctuation. READ MORE

7. 5. Multivariate Aspects of Phylogenetic Comparative Methods

   Author : Krzysztof Bartoszek; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; General Linear Model; Ornstein-Uhlenbeck process; Multivariate phylogenetic comparative method; Evolutionary model; Adaptation; Optimality; Measurement error; Regression; Adaptation; Major-axis regression; Reduced major-axis regression; Structural equation; Allometry; Phylogenetic inertia; Allometry;

   Abstract : his thesis concerns multivariate phylogenetic comparative methods. We investigate two aspects of them. The first is the bias caused by measurement error in regression studies of comparative data. We calculate the formula for the bias and show how to correct for it. READ MORE