A5105977239- Plant Water Relations and Carbon Dynamics
- Hydrology and Watershed Management Studies
- Forest ecology and management
- Soil erosion and sediment transport
- Tree-ring climate responses
- Hydrology and Sediment Transport Processes
- Soil and Unsaturated Flow
- Soil and Water Nutrient Dynamics
- Tree Root and Stability Studies
- Fire effects on ecosystems
- Remote Sensing and LiDAR Applications
- Irrigation Practices and Water Management
- Cryospheric studies and observations
- Bamboo properties and applications
- Landslides and related hazards
- Remote Sensing and Land Use
- Forest Ecology and Biodiversity Studies
- Aeolian processes and effects
- Ecology and Conservation Studies
- Climate variability and models
- Plant responses to elevated CO2
- Soil Carbon and Nitrogen Dynamics
- Plant Ecology and Soil Science
- Ecology and Vegetation Dynamics Studies
- Flood Risk Assessment and Management
Kyushu University
2015-2024
Forest Research
2015
Beijing Normal University
2015
Qingdao Agricultural University
2015
National Agriculture and Food Research Organization
2011
The University of Tokyo
2011
National Taiwan University
2009
Tottori University
1991-2000
Kagawa University
1988
Forest thinning can significantly affect hydrological processes. However, these effects largely vary with forest types, climate, intensity, and variables of interest. Understanding their variations support treatments' design selection to ensure desired benefits. In this global-level review paper, we report the first comprehensive meta-analysis on major processes an emphasis rainfall partitioning, soil moisture evapotranspiration The synthesized reviewed studies encompass different...
Abstract Modern ecohydrologic science will be critical for providing the best information to policy makers and society address water resource challenges in 21st century. Implicitly, ecohydrology involves understanding both functional interactions among vegetation, soils, hydrologic processes at multiple scales linkages upland, riparian, aquatic components. In this paper, we review historical contemporary science, focusing on watershed structure function threats function. Climate change, land...
Abstract The effects of rainfall conditions and the morphological characteristics leaves on moisture dynamics litter layers were investigated. Maximum water storage capacity interception under various evaluated for two contrasting types: a needle‐leaf type, represented by Cryptomeria japonica leaves; broad‐leaf Lithocarpus edulis leaves. An artificial simulator was applied to measure each type's intensities. Our results indicated that (1) maximum layer proportional mass (kg/m 2 ) regardless...
We determined the amount of information needed to estimate watershed-scale transpiration in a Japanese cedar (Cryptomeria japonica D. Don) forest from sap flow measurements individual trees. Measurements tree biometrics (diameter at breast height (DBH) and sapwood area (AS_tree)), tree-to-tree radial variations xylem flux density (Fd) were made two stand plots, an upper slope plot (UP) lower (LP), during growing season characterized by significant environmental factors. then investigated how...
Understanding radial and azimuthal variation, tree-to-tree in sap flux density (Fd) as sources of uncertainty is important for estimating transpiration using flow techniques. In a Japanese cedar (Cryptomeria japonica D. Don.) forest, Fd was measured at several depths aspects 18 trees, heat dissipation (Granier-type) sensors. We observed considerable variation Fd. The coefficient (CV) calculated from depth 0-20 mm (Fd1) 20-40 (Fd2) ranged 6.7 to 37.6% (mean = 28.3%) 19.6 62.5% 34.6%) the...
Although coarse woody debris (CWD) is an important component of stream ecosystems in forested areas, the processes CWD distribution, transport, and retention have not been clarified. In this study distribution process pieces shorter than bankfull width (S‐CWD) discussed using situ field experiment log transport a survey mountain streams. The showed that distance has close relation to flow depth also implied magnitude sequence series flows were factors for S‐CWD indicated in‐stream...
In this study, we aimed to assess how sample sizes affect confidence of stand-scale transpiration (E) estimates calculated from sap flux (Fd) and sapwood area (AS_tree) measurements individual trees. a Japanese cypress plantation, measured Fd AS_tree in all trees (n = 58) within 20 × m study plot, which was divided into four 10 subplots. We E stand (AS_stand) mean (JS) values. Using Monte Carlo analyses, examined the potential errors associated with E, AS_stand JS using original data sets....
Abstract In J apan, forests of M oso bamboo ( Phyllostachys pubescens , an exotic invasive giant bamboo) have naturalized and expanded rapidly, replacing surrounding broadleaved coniferous forests. To evaluate impacts caused by these forest‐type replacements on the hydrological cycle, soil‐water content its spatial variability in a forest were compared with those adjacent evergreen forest, case study stand western apan (northern K yushu). The volumetric averaged over depths between 0 60 cm...
Abstract In this study, we aimed to clarify spatial variations in xylem sap flow, and determine the impacts of these on stand‐scale transpiration ( E ) estimates. We examined circumferential radial flow velocity F d measured at several directions depths tree trunks black locust Robinia pseudoacacia native oak Quercus liaotungensis ), both which have ring‐porous wood anatomy, forest stands Loess Plateau, China. evaluated estimates using a simple scaling exercise. found significant outermost...
This study examined the effects of herbaceous plant roots on interrill erosion using two species: clover (Trifolium repens) and oats (Avena sativa). We developed a simple rainfall simulator with relatively high normalized kinetic energy (KE; 23.2 J m−2 mm−1). Under simulated rainfall, we measured eroded soil for 42 boxes various amounts aboveground belowground biomass. Aboveground vegetation had significant effect rate (SER). found clear negative relationship between percent cover (c) SER....