updated: May 28, 2011go fujita
ecology, animal behavior & conservation
Habitat selection of birds in patchy agricultural landscape
Agricultural landscapes are highly patchy, as you know. Light brown of a wheat field is often adjacent to fresh green of a meadow. Shining water of a rice paddy is edged with green grass ridges or footpaths.
Paddy fields before planting (Boso, Japan)
I consider the agricultural landscape a model system to study decision making on patch choice or habitat selection of animals. If the landscape is perfectly even, patch choice is no longer problem. An individual can gain the same benefit from anywhere it settles in. Patch choice can be an issue under the heterogeneous landscape only and, of course, the world is heterogeneous more or less. I believe that the agricultural landscape is a clear-cut example of various habitats in the world.
In addition, it is easy to measure what patch animals use within the landscapes. These mosaic structures are likely to generate spatial structures of populations that might govern dynamics of the populations.
barn swallows aggregating in open fields
Farmlands in Satsuma peninsula, the southernmost of mainland Japan, are dominated by potato fields and tea bushes. Within the fields, barn swallows, a summer visitor, aggregate into particular sites from early August to late September, between just after the nesting periods and before the migration season of the swallows.
I focus on ecological process generating the variations of swallow numbers aggregating poultry farms at large scales in Satsuma peninsula, south Japan.
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