Search for dissertations about: "Vegetation dynamics"

Showing result 1 - 5 of 106 swedish dissertations containing the words Vegetation dynamics.

2. 1. Analyzing Vegetation Trends with Sensor Data from Earth Observation Satellites

   Author : Sadegh Jamali; Institutionen för naturgeografi och ekosystemvetenskap; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Change detection; Satellite sensor data; Time series analysis; Vegetation dynamics; Vegetation index;

   Abstract : Abstract This thesis aims to advance the analysis of nonlinear trends in time series of vegetation data from Earth observation satellite sensors. This is accomplished by developing fast, efficient methods suitable for large volumes of data. READ MORE

4. 2. Understanding Weather effects on, in, and from large Herbivore Population Dynamics

   Author : Lena Månsson; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; monitoring; management; data collection; Ecology; Ekologi; indirect effects; vegetation; modeling; time series analysis; precipitation; weather; population dynamics; Large herbivores;

   Abstract : Large herbivores are monitored for various reasons in many areas around the world. Data from such monitoring can be of varying degree of detail and extent. Several studies have shown that we need extensive amounts of data with a high degree of detail to be able to understand anything from it. READ MORE

5. 3. The role of vegetation dynamics in the control of atmospheric CO2 content

   Author : Stephen Sitch; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Atmospheric CO2 content; climate change; plant functional types; terrestrial biosphere model; DGVM; vegetation dynamics; land use; land cover change; Plant ecology; Växtekologi;

   Abstract : This thesis contains a description of the Lund-Potsdam-Jena Dynamic Global Vegetation Model (LPJ-DGVM) and its application to infer the role of vegetation dynamics on atmospheric CO2 content at different time-scales. The model combines vegetation dynamics and biogeochemistry in a modular framework. READ MORE

6. 4. Holocene vegetation dynamics and climate changes in the Torneträsk area, northern Sweden

   Author : Lena Barnekow; Kvartärgeologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Paleobotanik; palynology; phylogeny; Palaeobotany; northern Sweden; Torneträsk; Abisko; lake-level; radiocarbon dating; forest history; Holocene; tree-line; climate; Vegetation; fylogeni; palynologi; Physical geography; geomorphology; pedology; cartography; climatology; Fysisk geografi; geomorfologi; marklära; kartografi; klimatologi;

   Abstract : The aim of this study was to reconstruct the Holocene vegetation history and the climate changes in a subarctic area. The results are based on pollen and macrofossil records from six lakes in the Torneträsk area. The lakes are situated at altitudes between 370 and 999 m a.s. READ MORE

7. 5. Land-atmosphere interactions and regional Earth system dynamics due to natural and anthropogenic vegetation changes

   Author : Minchao Wu; MERGE: ModElling the Regional and Global Earth system; []
   Keywords : land-atmosphere interactions; RCA-GUESS; LPJ-GUESS; Vegetation dynamics; Fire;

   Abstract : Observation and modelling studies have indicated that the global land surfaces have been undergoing significant changes in the past few decades, driven by both natural and anthropogenic factors, such as changes in ecosystem productivity, fire and land use. Land surface changes can potentially influence local and regional climate through land-atmosphere interactions. READ MORE