| Welcome to the English page of
Cold Region Plant Ecology and Physiology Group
(as an ILTS lab) and
Plant Ecology Cource
(as a cource in the Graduate School of Environmental Science)
Now Accepting New Graduate Students !!!
Graduate students in our lab will also belong to:
the Plant Ecology Course, the Division of Biosphere Science,
the Graduate School of Environmental Science, Hokkaido Univ.
For prospective graduate students, contact directly to a teaching staff.
Plant communities in the boreal region are likely to be most affected
by global environmental change. However, there are still many unsolved
questions regarding plant communities in the boreal region. Our main interest
is on the establishment, regeneration and maintenance processes of herbaceous and
forest plants and communities in the boreal region, and their interaction
with the physical environment.
Specific research topics are as listed below.
Field and Lab researches in plant ecology
1) Growth and competition of individual plants and modeling
2) Structure and dynamics of tree crown and forest canopy
3) Physiological responses of plants to cold and dry environmental stresses
4) Reproductive strategy of perennial plants
Fig. 1. Branch tips of Akaezomatsu spruce (Picea glehnii) in the canopy.
There are something that cannot be understood without accessing to tree
crowns. Growth and death of branches are investigated to understand the
crown and canopy dynamics of this evergreen conifer species. Recent studies
include mRNA measurements of current-year shoots in order to access physiological
mechanisms of branch growth and death. This reserach site is located in
the Sapporo campus of Hokkaido University.
Research in the laboratory
1) Plant growth experiments using a biotron
2) Physiological and biochemical analysis of photosynthesis
3) Development of mathematical models for scientific synthesis
Fig. 3. Laboratory studies in the lab
The abovementioned lab studies are conducted in the building of the Institute
of Low Temperature Science.
Field study sites
Forests and mountain meadows in Hokkaido and north-central Europe
Fig. 3. Sub-boreal forest in Taisetsu, Hokkaido (Betula ermanii , Abies sachalinensis, Picea jezoensis,etc.). By comparing photosynthetic mechanisms, we hope to elucidate how
broad-leaved trees and conifers can coexist in the boreal region.
Through collaborative research, we aim to synthesize the interaction between
biological and physical processes.
- Photosynthetic and phenological responses to environmental stresses, such as low temperature, desiccation, photo-inhibition.
- Interactions among forest regeneration, growth, genetic make-up, energy
and water cycle, soil development, glacial dynamics, and development of
theoretical models to synthesize these processes that define the boreal
＜Teachng staff at ILTS *＞
* See Member page for the teaching staff of another lab
HARA, Toshihiko (Professor)
Professor Hara's research focuses on incorporating size,genetic, and spatial
structure of populations into theoretical models ofplant growth and competition,
regeneration and maintenance processes of plant communities, and plant
species coexistence. Research sites includeplant communities of the boreal
region, such as forests, annual and perennial herb communities. He aims
to elucidate the interaction between biological and physical processes
by synthesizing plant community establishment, regeneration and maintenance
with global climate and environmental change.
// Tel. +81-11-706-5455
SUMIDA, Akihiro (Associate Professor)
The crown and canopy structure of trees and forests are a key to understand
how trees survive under biological and physical environment. Dr, Sumida's
research focuses on leaf- to crown-scale measurements to elucidate the
dynamics of forest ecosystms from the perspective of spatial structure
// Tel. +81-11-706-5507
ONO, Kiyomi (Assistant Professor)
// Tel. +81-11-706-5469
HASEGAWA, Shigeaki (Assistant Professor)
// Tel. +81-11-706-7660
TABATA, Azusa (PD Fellow)
WAKATSUCHI, Moe (Lab Secretary)
// Tel. +81-11-706-5455
Nariga, Ayu (Ph.D student)
LI, Zhou (Master student)
Ochi, Nagiko (Master student)
Former post-docs (2003-)
Former students (2003-)
TAKAYAMA, Yukari (as Master student)
YAMAGUCHI, Takahiro (as Master student)
OKUBO, Kenzo (as Master student)
KUJIRAOKA, Keisuke (as Master student)
IIMURA, Kayo (as Master student)
TSUDA, Hajime (as Master student)
FUJIBE, Takumi (as Master student)
HASHIGUCHI, Megumi (as Master student)
ISHIMORI, Waka (as Master student)
BONTEMPO E SILVA, Edgard Alves (Ph.D student)
KONG, Bihe (Ph.D student)
CHEN, Lei (Ph.D student)
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Institute of Low Temperature Science