A5061009406- Ecology and Vegetation Dynamics Studies
- Forest ecology and management
- Plant Water Relations and Carbon Dynamics
- Plant and animal studies
- Soil Carbon and Nitrogen Dynamics
- Forest Ecology and Biodiversity Studies
- Plant responses to elevated CO2
- Tree-ring climate responses
- Species Distribution and Climate Change
- Atmospheric chemistry and aerosols
- Ecology and Conservation Studies
- Wildlife Ecology and Conservation
- Animal Ecology and Behavior Studies
- Remote Sensing in Agriculture
- Remote Sensing and LiDAR Applications
- Forest Insect Ecology and Management
- Freshwater macroinvertebrate diversity and ecology
- Botany and Plant Ecology Studies
- Fire effects on ecosystems
- Lichen and fungal ecology
- Forest Management and Policy
- Horticultural and Viticultural Research
- Insect and Pesticide Research
- Fish Ecology and Management Studies
- Insect and Arachnid Ecology and Behavior
National Institute of Technology, Tomakomai College
2013-2024
Hokkaido University
2015-2024
The University of Tokyo
2020-2024
Tohoku University
2021
Tokyo Metropolitan University
2021
Suzuki (Japan)
2021
The Japanese Society of Gastroenterological Surgery
2021
Hudson Institute
2021
Czech Academy of Sciences, Biology Centre
2010
Institute of Soil Biology
2010
Abstract Impacts of human activity on forest ecosystems are most pronounced in the temperate region. Simplification stand structure has resulted diminished ecosystem function and biodiversity decline, raising much debate over future management policies. Ecosystem functions may be enhanced by managing forests for increased structural complexity. However, processes that determine relationships among complexity, functions, remain unclear. In this review, we present examples studies conducted at...
Understanding how plants are constructed—i.e., key size dimensions and the amount of mass invested in different tissues varies among individuals—is essential for modeling plant growth, carbon stocks, energy fluxes terrestrial biosphere. Allocation patterns can differ through ontogeny, but also coexisting species adapted to environments. While a variety models dealing with biomass allocation exist, we lack synthetic understanding underlying processes. This is partly due suitable data sets...
Abstract The role of resource availability in determining the incidence masting has been widely studied, but how floral transition and initiation are regulated by level is unclear. We tested hypothesis that stimulated high availabiltiy Fagus crenata based on a new technique, expression analyses flowering genes. isolated F. orthologues FLOWERING LOCUS T , LEAFY APETALA1 confirmed their functions using transgenic Arabidopsis thaliana . monitored gene levels for 5 years detected cycle off...
Accurate estimation of tree and forest biomass is key to evaluating ecosystem functions the global carbon cycle. Allometric equations that estimate from a set predictors, such as stem diameter height, are commonly used. Most allometric site specific, usually developed small number trees harvested in area, either species specific or ignore interspecific differences allometry. Due lack site-specific allometries, local often applied sites for which they were not originally (foreign sites),...
We studied regeneration patterns of the four canopy dominants, Abiessachalinensis (Fr. Schm.) Masters, Piceajezoensis (Sieb. et Zucc.) Cam, Piceaglehnii and Betulaermanii Cham., an old-growth (>400 years) boreal coniferous forest in northern Japan. Age size structure, height growth, diameter growth tree populations a 40 × m plot were analyzed. Seedling establishment was restricted to nurse logs mounds (98%), where influence dwarf bamboo (Sasasenanensis (Franch. Sav.) Rehd.) limited. had...
Abstract. Eddy covariance observations play a pivotal role in understanding the land–atmosphere exchange of energy, water, carbon dioxide (CO2), and other trace gases, as well global cycle earth system. To promote networking individual measurements sharing data, FLUXNET links regional networks researchers studying processes. JapanFlux was established 2006 country branch AsiaFlux. Despite growing number shared data globally, availability Asia is currently limited. In this study, we developed...
Abstract A commercial colony of Bombus terrestris (L.) was introduced to Japan in 1992 for crop pollination greenhouses. Since then wild colonies have developed and spread some regions. In the present study, we measured spatial distribution temporal change abundance B. Chitose River Basin, Hokkaido, elucidate relation greenhouses bee's evaluate its potential effects on native bumblebees. Bumblebees were collected with window traps windbreak forests roughly 1, 2, 4, 6 km NNW SSE a large...
Numerous studies have revealed the existence of nonrandom trait distribution patterns as a sign environmental filtering and/or biotic interactions in community assembly process. A number metrics with various algorithms been used to detect these without any clear guidelines. Although some compared their statistical powers, differences performance among under conditions close actual are not clear. Therefore, performances five convergence and 16 divergence alternative were comparatively...
Abstract Biogenic organic aerosols can affect cloud condensation nuclei (CCN) properties, and subsequently impact climate change. Large uncertainties exist in how the difference types of terrestrial biogenic sources abundance organics relative to sulfate CCN properties. For submicron water-soluble collected for two years a cool-temperate forest northern Japan, we show that hygroscopicity parameter κ (0.44 ± 0.07) exhibited distinct seasonal trend with minimum autumn (κ = 0.32–0.37); these...
The effects of warming on the temperature response leaf photosynthesis have become an area major concern in recent decades. Although growth (GT) and day length (DL) affect gas exchange characteristics, way which these factors influence dependence remains uncertain. We established open-top canopy chambers at top a deciduous forest, average daytime was increased by 1.0 °C. conducted measurements for leaves trees exposed to artificial during different seasons. carbon dioxide assimilation rate...
Understanding seasonal changes in photosynthetic characteristics of canopy leaves is indispensable for modeling the carbon balance forests. We studied gas exchange that are related to temperature dependence photosynthesis Quercus crispula Blume, one most abundant species cool-temperate forests Japan. Photosynthetic rate and ribulose-1,5-bisphosphate (RuBP) carboxylation capacity (Vcmax) at 20 °C increased from June August then decreased September. The activation energy Vcmax, a measure was...
Japanese beech (Fagus crenata Blume) is widely distributed across the Japan archipelago. This species requires morphological and physiological plasticity to cope with diverse environmental conditions its geographical range. In this study, we monitored transpiration (E) examine mechanisms as an example of variation in whole-tree water use. We determined E by measuring sap flux trees three stands: Kuromatsunai (KR), Kawatabi (KW) Shiiba (SH), which were located different areas Japan. conducted...