Combining larval habitat quality and metapopulation structure
Spatial population dynamics of brown bears in Scandinavia and Finland Jonna Katajisto Metapopulation...
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Transcript of Spatial population dynamics of brown bears in Scandinavia and Finland Jonna Katajisto Metapopulation...
Spatial population dynamics of brown bears in Scandinavia and
Finland
Jonna Katajisto
Metapopulation Research Group
Why?
– MSc thesis for Scandinavian Brown Bear Project
– To more methodological direction
– Fragmentation and poaching main threats of bear populations
– ”Bears threat to human populations”
Aims and means
– Main processes and mechanisms determining population dynamics?
– How affected by spatial and temporal patterns of landscape?
Spatially explicit population models
Specific issues
– Viability of bear populations under current and future management plans
– Effects of landscape structure on dispersal and population expansion
– Effects of harvesting
– Human conflicts
Outline
– Linking landscape patterns to population dynamics
– Brown bear data
– Modelling challenges
Landscape
- succession- human land use
LandscapeDynamics
Individual
Demographic processes
Spatial processes- movement
- habitat choice- interactions
Population densityDistribution
– Scandinavian Brown Bear Research Project since 1984
– To date ~300 bears
– At the moment ~100
– Most followed their lifetime
– Finnish Game and Fisheries Research Institute
My bears
Habitat quality and human influence
– CORINE land use data Maps for habitat quality and
human activity Habitat specific demography
Hunter-kills Harvesting with demographic
variability
– Intensive/daily/ weekly/ monthly locations
Detailed individual movement
– Dispersal from mother’s home range until establishment
Large scale approach
Dispersal
Spatially explicit individual-based population model
Modelling challenges
– Data quality:
– Almost infinite possibilities for modelling detailed behaviour
– Complex models difficult to test
1. Biological processes
2. Parameter values
3. Stochasticity
Excellent data
Answers to some questions Improving spatial modelling
Novel modelling