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Forest Biology Lab
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The lab explores the diverse ecology of forest organisms through the interactions among deer, insects, and plants.

AboutAbout the lab
Exploring the diverse ecology of forest organisms.
The Forest Biology lab analyzes the ecology of diverse forest organisms, including trees, animals, and insects, mainly from a plant perspective.
Its work has two sides: basic science that clarifies how organisms in forests interact, and applied science that supports wildlife management and forest conservation.
Using ecological and genetic methods, it studies plant reproduction, animal diet and behavior, and insect behavior.
Undergraduates are assigned to the lab in their fourth year (graduate students belong to the Division of Forest Science, Graduate School of Agriculture).
Key terms
- Phylogeography
- A field that traces where and how organisms spread and diverged, based on genetic differences and distributions.
- Japanese oak wilt
- Damage in which oaks and other trees die off in groups because of a pathogenic fungus carried by ambrosia beetles.
- Deer exclusion fence
- A fence that surrounds a forest area to keep deer out.
ResearchResearch themes
The lab analyzes the ecology of diverse forest organisms mainly from a plant perspective, working to clarify how organisms interact and to apply this to wildlife management and forest conservation.
*Illustrative imageSpeciation and evolution of forest organisms
Forest organisms have evolved into diverse species and populations through changes in topography and climate and through adaptation to their environments. The lab uses molecular phylogenetics, phylogeography, and population genomics to study this evolutionary history and how diversity arises.
*Illustrative imageForest change and regeneration caused by deer
Increasing deer numbers have degraded vegetation and reduced biodiversity. By comparing the inside and outside of large deer exclusion fences in the Ashiu Research Forest, the lab has studied over the long term how deer affect vegetation, interactions among organisms, and ecosystem function.
*Illustrative imageThe beetle behind Japanese oak wilt
The ambrosia beetle Platypus quercivorus carries a pathogenic fungus and causes Japanese oak wilt. By analyzing damaged trees in various forests, the lab studies how the beetle efficiently finds its host trees.
*Illustrative imageProtecting endangered species
Human activities have put many animals and plants at risk of extinction. Using genetic analysis and ecological surveys, the lab clarifies the current status of endangered species and the factors leading to their extinction, and considers better conservation methods.
MembersFaculty
The Forest Biology lab consists of faculty and doctoral, master's, and undergraduate students.
- ProfessorShota Sakaguchi
- Associate ProfessorMasatoshi Yamasaki
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Sika Deer 30123652” belvedere04 / CC BY 4.0 (cropped)
- Speciation and evolution of forest organisms: “Longhorn beetle (Glenea fasciata) Nyamebe Bepo” Charles J. Sharp / CC BY-SA 4.0 (cropped)
- Forest change and regeneration caused by deer: “Deer fence and coniferous forest - geograph.org.uk - 1540126” Ian Balcombe / CC BY-SA 2.0 (cropped)
- The beetle behind Japanese oak wilt: “Sprouting Regeneration of Oak Wilt-Damaged Trees” Yoshidahaku23 / CC BY-SA 4.0 (cropped)
- Protecting endangered species: “Iriomote cat 2” Iriomote Wildlife Conservation Centre (IWCC) / CC BY 4.0 (cropped)
- Related lab (Forest Ecology Lab): “Smoke-filtered Sun on the Forest Canopy ( )” Forest Service - Northern Region / Public domain (cropped)
- Related lab (Tree Cell Biology Lab): “Resin Canals” Bweil2 / CC BY-SA 4.0 (cropped)
- Related lab (Forest Biochemistry Lab): “Wood decay fungus” Sindugab / CC0 (cropped)
- Related lab (Mountain Conservation Lab): “Oirase Mountain Stream 500px photo ( )” Chi King / CC BY 3.0 (cropped)
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