A5001827173- Forest ecology and management
- Ecology and Vegetation Dynamics Studies
- Forest Ecology and Biodiversity Studies
- Remote Sensing and LiDAR Applications
- Tree Root and Stability Studies
- Plant and animal studies
- Fire effects on ecosystems
- Photochemistry and Electron Transfer Studies
- Horticultural and Viticultural Research
- Carbon Nanotubes in Composites
- Bone Tissue Engineering Materials
- Tree-ring climate responses
- Radical Photochemical Reactions
- Remote Sensing in Agriculture
- Genetic diversity and population structure
- Ecology and Conservation Studies
- Fluorine in Organic Chemistry
- Plant Water Relations and Carbon Dynamics
- Surfactants and Colloidal Systems
- Photochromic and Fluorescence Chemistry
- Porphyrin and Phthalocyanine Chemistry
- Forest Management and Policy
- Cancer Treatment and Pharmacology
- Species Distribution and Climate Change
- Organic Chemistry Cycloaddition Reactions
Gunma University
2011-2025
National Institute for Environmental Studies
2023
Forestry and Forest Products Research Institute
2010-2023
Toyama Prefectural Agricultural, Forestry & Fisheries Research Center
2023
Okayama University
1992-2016
Teijin (Japan)
2015-2016
Nagoya Sangyo University
2005-2010
Nagoya University
2001-2010
The University of Queensland
2010
University of Oregon
2010
Abstract. The structure and composition of a cool‐temperate old‐growth beech ( Fagus crenata ) ‐ dwarf bamboo Sasa spp.) forest, partially affected by landslide disturbance, in the Daisen Forest Reserve southwestern Japan, were investigated relation to forest floor canopy conditions. All stems ≥ 4 cm DBH mapped on 4‐ha plot analyses made population structure, spatial distribution association major tree species. dominant species, F. crenata, which had maximum among species present, highest...
Summary Forest canopy gap and community dynamics were studied in a 4‐ha permanent plot of an old‐growth evergreen broad‐leaved forest dominated by Castanopsis cuspidata var. sieboldii Distylium racemosum the Tatera Reserve, Tsushima Islands, south‐western Japan. The was affected powerful typhoon 1987 monitored from 1990 to 1997. In 1990, all woody stems ≥ 5 cm diameter at breast height (d.b.h.) identified, mapped marked, state 1600 m × contiguous quadrats used locate gaps. Gaps occupied...
Abstract Despite their fundamental importance the links between forest productivity, diversity and climate remain contentious. We consider whether variation in productivity across climates reflects adjustment among tree species individuals, or changes community structure. analysed data from 60 plots of humid old-growth forests spanning mean annual temperatures (MAT) 2.0 to 26.6 °C. Comparing at equivalent aboveground biomass (160 Mg C ha –1 ), tropical ≥24 °C MAT averaged more than double...
Nonrandom patterns of gene dispersal have been identified as possible causes genetic structuring within populations. Attempts to model these generally focused solely on the effects isolation by distance, but processes involved are more complex than such modeling suggests. Here, we extend considerations beyond simple distance directly evaluating kin-structured mediated group related seeds fruits (i.e., seed dispersal) birds structure in Ilex leucoclada, a clonal dioecious shrub. To examine...
Abstract. The growth dynamics and mode of competition between adult trees ≥ 4 cm in DBH (stem diameter at breast height 1.3 m) eight abundant species occupying ca. 90 % the total basal area were investigated a 4‐ha study plot (200 m × 200 cool‐temperate, old‐growth forest on Mount Daisen, southwestern Japan. In plot, 30 tree with individuals 4.0 co‐occurred. A bimodal distribution showing upper lower‐canopy layers was found for most dominant largest species, Fagus crenata (ca. 78 area),...
The common pattern of replicated evolution a consistent shape—environment relationship might reflect selection acting in similar ways within each environment, but divergently among environments. However, phenotypic depends on the availability additive genetic variation as well direction selection, implicating bias distribution variance potential contributor to evolution. Allometry, between shape and size, is source that poorly understood. threespine stickleback, Gasterosteus aculeatus,...
Stand structure and species diversity were studied in correspondence with micro-topographies an old-growth forest southwestern Japan. The study was conducted a 200×200m2 permanent plot, which divided into 400 subplots using grids of 10m×10m. Subplots categorized to four as crest slope (CS), head hollow (HH), upper (US) lower (LS), basing on floor plot position, two elevational zones below 450 m above m. Tree censuses for all individuals diameter at breast height (DBH) ⩾ 5 cm 2009 2013....
Abstract We investigated clonal diversity within patches of Ilex leucoclada and genetic variation among using random amplified polymorphic DNA (RAPD) markers in a 1‐ha plot an old‐growth beech forest. found 38 that exhibited clumped distribution the middle plot. identified total 166 RAPD phenotypes 215 stems sampled from 27 were completely The population showed high (mean number genets relative to = 0.79; mean Simpson's D 0.89). Variation was highly significant (Φ ST molecular variance...
The absence of an optimal nano-sized reference material has been the biggest obstacle in evaluating safety carbon nanotubes as biomaterials. In this study, black tattoo inks, which have a long history use by humans, are shown to be suitable materials composed particles. We also demonstrated that multi-walled comparable basic properties those inks when used
Summary Long‐term canopy dynamics in a large area of temperate old‐growth beech forest the Daisen Forest Reserve, south‐western Japan (11.56 ha studied over 43 years), were investigated using digital elevation models (DEMs) surface, constructed from aerial photographs taken growing season (i.e. with foliage) 1958, 1978, 1992 and 2001. A ground surface DEM at same resolution (a 2.5 × m grid) was when foliage absent (winter 2002). Canopy height data obtained by calculating differences between...
We investigated the structure and dynamics of multi-stemmed understory shrub Lindera triloba (Sieb. et Zucc.) Blume over 3 years in an old-growth coniferous forest, quantitatively evaluated factors affecting ramet production, growth, survival. Most genets sprouted continuously exhibited multiple-stemmed structures with a few large many small ramets. The skewed ramet-size distribution within resulted from local crowding neighboring trees, but not number ramets genets. This indicated that...
The azo-hydrazone tautomerism of 4-phenylazo-1-naphthol has been studied in ethanol-water and acetone-water systems at high pressures. hydrazone form is favoured by adding water to organic cosolvents applying pressure. effects solvent polarity pressure on the equilibrium constant (KT) between tautomers were examined using Kirkwood-type equations applied chemical equilibrium. Remarkable deviations observed Kirkwood plots for both types mixtures. Solvent-induced polarization, especially a...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies on the synthesis of chemotherapeutics. 12. Synthesis and antitumor activity N-phthalidyl-5-fluorouracil derivativesTetsuji Kametani, Kazuo Kigasawa, Mineharu Hiiragi, Kikuo Wakisaka, Nakazato, Keiko Ichikawa, Kazunaga Fukawa, Osamu Irino, Naoyuki Nishimura, Taiji OkadaCite this: J. Med. Chem. 1982, 25, 10, 1219–1222Publication Date (Print):October 1, 1982Publication History Published online1 May 2002Published inissue 1 October...
Abstract Question: Does the interplay of life-history strategy and tree competition promote species co-existence? Using a growth dynamics model, we investigated mechanisms co-existence among major in sub-alpine old-growth coniferous forest. Location: Sub-alpine forest at 1850–1920 m a.s.l. Ontake Forest Reserve central Japan. Methods: We mortality rates trees ≥ 5.0 cm stem DBH recruitment processes 2-ha study plot, developed model for individual that incorporated both intra interspecific...