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Graduate School of Science and Engineering
Science of Environment and Mathematical Modeling

Wild Life Preservation Laboratory


Hiroshi TAKEDA
Telephone : +81-774-65-6366
Office : KE-411
Database of Researchers
Takashi OSONO
Telephone : +81-774-65-6688
Office : KE-310
Database of Researchers

Research Contents

A template of "foods and living places" provided by forest ecosystems
Hiroshi TAKEDA, Professor

My research uses the concept of a template of "food and living places" that plants provide in a forest ecosystem as an approach to explain forest biodiversity. The functions and structures of forest ecosystems are maintained by interactions between plants and decomposers.

Producer plants in forest ecosystems<-- -->Soil decomposer system
Through the process of photosynthesis, plants in a forest ecosystem produce a menu of foods and living places as resources. Just as food, shelter and clothing are critical to the lives of humans, food (energy) and living places of the living creatures in the forest are critical in our understanding of ecosystem biodiversity.A certain percentage of the organic matter produced by trees in forest ecosystems is used by consumer animals. As a result, the earth's vegetation is preserved. As organic matter withers and dies, it is decomposed by decomposer microorganisms and animals in the soil decomposer system. The result is that nutrient substances are recycled between plants and the decomposer system.
Research on mechanisms of forest ecosystem decomposer systems
Focusing on the interrelationship among leaf litter, decomposer microorganisms and soil animals, research is being conducted on the form of decomposition of leaf litter, residual amounts of nutrients in the soil, and the form of nutrient supply by soil moisture. This research is taking place at Kyoto University Ashiu Experiment Forest, Kyoto University Kamigamo Experiment Field and Mt. Tanakami in Shiga Prefecture, among other places.

Behavior of rootlets in soil and role of soil animals
Research is being done on the amount of rootlets supplied to the soil decomposer system as well as the behavior of rootlets, at Kamigamo, an evergreen seasonal forest in Thailand, in mountain forests and in plantations of sugi (Cryptomeria japonica). Manipulative experiments to clarify the functions of soil animal community structures are being done at Kamigamo, while research into rootlets is taking place in the Thai forest. In particular, as for soil animals, I am prescribing manipulative experiments to elucidate their functions.

Tree module mechanism in forest ecosystems
At Kyoto University Kamigamo Experiment Field, Mt. Tanakami in Shiga Prefecture and Ashiu Experiment Forest, I am researching forms of behavior in module units consisting of branches, leaves and sprouts in major tree species in order to reveal the mechanism of forest regeneration and maintenance.
Ecology and diversity of fungi
Takashi OSONO, Professor

Fungi, often invisible to the naked eyes, are responsible for decomposition and symbiotic interactions in terrestrial ecosystems. However, ecological functioning and biodiversity of fungi are largely unknown despite their importance as decomposers, endophytes, pathogens, and mycorrhizal symbionts. My research interest is on the biodiversity of functioning of fungi as biological resources from temperate to polar and tropical regions.

<1> Ecology and functional diversity of ligninolytic fungi
<2> Biodiversity and ecosystem functioning of polar region
<3> Aquatic plant manure and nutrient cycling in a watershed
<4> Biodiversity conservation of World Natural Heritage sites
<5> Functioning and evolution of plant-fungus mutualism


  • Biodiversity and ecosystem functioning
  • Litter decomposition and soil processes

  • Arctic, Antarctic, and alpine biodiversity
  • Endophytic fungi