A5002872572- Remote Sensing in Agriculture
- Plant Water Relations and Carbon Dynamics
- Plant responses to elevated CO2
- Soil Carbon and Nitrogen Dynamics
- Remote Sensing and LiDAR Applications
- Forest ecology and management
- Horticultural and Viticultural Research
- Species Distribution and Climate Change
- Leaf Properties and Growth Measurement
- Ecology and Vegetation Dynamics Studies
- Plant Stress Responses and Tolerance
- Ecology and Conservation Studies
- Land Use and Ecosystem Services
- Tree-ring climate responses
- Atmospheric chemistry and aerosols
- Remote Sensing and Land Use
- Peatlands and Wetlands Ecology
- Plant nutrient uptake and metabolism
- Seedling growth and survival studies
- Soil Geostatistics and Mapping
- Geochemistry and Geologic Mapping
- Botany and Plant Ecology Studies
- Urban Heat Island Mitigation
- Animal Ecology and Behavior Studies
- Spectroscopy and Chemometric Analyses
Hokkaido University
2016-2025
National Institute of Technology, Tomakomai College
2011-2024
Hokkai Gakuen University
2023
Tohoku University
2021
Tokyo Metropolitan University
2021
Suzuki (Japan)
2021
The Japanese Society of Gastroenterological Surgery
2021
Hudson Institute
2021
Swiss Federal Institute for Forest, Snow and Landscape Research
2018
Hokkaido University of Science
2015
Abstract. Plant phenological development is orchestrated through subtle changes in photoperiod, temperature, soil moisture and nutrient availability. Presently, the exact timing of plant stages their response to climate management practices are crudely represented land surface models. As visual observations phenology laborious, there a need supplement long-term with automated techniques such as those provided by digital repeat photography at high temporal spatial resolution. We present first...
Summary Leaf traits are essential for understanding many physiological and ecological processes. Partial least squares regression (PLSR) models with leaf spectroscopy widely applied trait estimation, but their transferability across space, time, plant functional types (PFTs) remains unclear. We compiled a novel dataset of paired spectra, 47 393 records > 700 species eight PFTs at 101 globally distributed locations multiple seasons. Using this dataset, we conducted an unprecedented...
We investigated seasonal changes in the photochemical reflectance index (PRI) and its relation to diurnal profile of photosynthetic light use efficiency (LUE) mature Japanese larch (Larix kaempferi Sarg.) forest throughout growing season from June October 2003. The daily mean value needle PRI showed variation, strongly correlated with chlorophyll concentration carotenoid/chlorophyll ratio needles. During green period early late September, hourly values both LUE significant midday depression,...
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 To evaluate the effects on CO 2 exchange of clearcutting a mixed forest and replacing it with plantation, 4.5 years continuous eddy covariance measurements fluxes soil respiration were conducted in conifer‐broadleaf Hokkaido, Japan. The was weak carbon sink (net ecosystem exchange, −44 g C m −2 yr −1 ), became large source (569 ) after clearcutting. However, emission harvest year rapidly decreased following (495 153 , respectively) as gross primary production (GPP) increased, while...
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...
In forest ecosystems, fine root respiration directly contributes to belowground carbon (C) cycling. Exudation from roots indirectly affects C cycling via enhanced microbial decomposition of soil organic matter. Although these root-derived fluxes are essential components cycling, how nitrogen (N) addition and their correlations remains unclear. this study, exudation, chemical/morphological traits were measured in a dominant canopy species, Quercus crispula Blume, found cool temperate forest,...
To understand better the plant response to ozone, we isolated and characterized an ozone-sensitive (ozs1) mutant strain from a set of T-DNA-tagged Arabidopsis thaliana ecotype Columbia. The plants show enhanced sensitivity desiccation sulfur dioxide, but have normal hydrogen peroxide, low temperature high light levels. T-DNA was inserted at single locus which is linked ozone sensitivity. Identification genomic sequences flanking insertion revealed disruption gene encoding transporter-like...
Research on canopy arthropods has progressed from species inventories to the study of their interactions and networks, enhancing our understanding how hyper-diverse communities are maintained. Previous studies often focused sampling individual tree species, trees or parts. We argue that such selective is not ideal when analyzing interaction network structure, may lead erroneous conclusions. developed practical reproducible guidelines for plot-based analysis arthropod networks in forest...
Remotely sensed vegetation indices such as the normalized difference index (NDVI) or enhanced (EVI) have been used to scale up flux-based gross primary production (GPP) measurements. Recently, use of visible-band (VIS) for estimation GPP has proposed, and VIS_indices derived from digital cameras detecting phenological changes. To confirm utility remotely evaluation in a Japanese larch forest, we investigated relationships between measurements both moderate resolution imaging...
Abstract Birds, bats and ants are recognised as significant arthropod predators. However, empirical studies reveal inconsistent trends in their relative roles top‐down control across strata. Here, we describe the differences between forest strata separate effects of birds, on densities cascading plant damage. We implemented a factorial design to exclude vertebrates both canopy understorey. Additionally, separately excluded birds from understorey using diurnal nocturnal exclosures. At end...