地球環境科学研究科 植物生態学セミナー   2009-06-02 (Tue) 10:30
(場所: A804 )

Review Seminar: The factors of litter decomposition

Fumiko Takeuchi

Litter decomposition controls the amount of carbon releasing to atmosphere and nutrient ability in natural ecosystems. In peatland ecosystems, the accumulation of organic matter is primarily caused by slow rate of litter decomposition. The decomposition rate mainly depends on microbial degradation, photodegradation and physical fragmentation. In particular, microbial degradation is affected by various environmental factors such as temperature, moisture and nutrient availability.

I have researched the decomposition rates on early colonized plants, Rhynchospora alba and Moliniopsis japonica, using a litter bag method in a post-mined peatland, Sarobetsu Mire, from 2008. In this study, the litter decomposition rates seems to be slower than those showed in previous studies and are not different between the grassland of R. alba and M. japonica. Now I focus on why the decomposition rates are slow in Sarobetsu Mire.

In this seminar, I will introduce the following papers focusing on the factors that controls litter decomposition rates.


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