| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Research Abstract |
I developed several general mathematical models on the population and evolutionary dynamics of symbiotic systems, especially mutualistic ones. I observed their characteristic behaviors and clarified the conditions with which those systems can evolve and persist. The results suggest that mutualism are more likely to evolve in harsher environments. Moreover, variation in populations should be essential for evolution and stable persistence of symbiosis. Especially parasites might play a key role for maintenance of the systems, while so far they have been considered as detrimental to them.
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