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Integration of Multi-Sensor Data to Estimate Plot-Level Stem Volume Using Machine Learning Algorithms-Case Study of Evergreen Conifer Planted Forests in Japan
UAS stem volume TLS SAR random forest support vector multiple regression forest biophysical parameter
2023/12/21
The development of new methods for estimating precise forest structure parameters is essential for the quantitative evaluation of forest resources. Conventional use of satellite image data, increasing...
Growth of Abies sachalinensis Along an Urban Gradient Affected by Environmental Pollution in Sapporo, Japan
air pollution climate change implications oxides urbanity tree growth
2024/3/4
Urban tree growth is often affected by reduced water availability, higher temperatures, small and compacted planting pits, as well as high nutrient and pollution inputs. Despite these hindering growth...
Effects of Forestry Activities on Streamwater Chemistry of a Small Mountainous Sub- Watershed at Serikawa River Basin on Shikoku Island,Japan
flow-adjusted concentration nonparametric statistics partial logging reforestation streamwater chemistry
2009/9/9
Two small mountainous sub-watersheds, located at Serikawa river basin on Shikoku Island of Japan were studied for streamwater chemistry. The objective of this study was to determine the impacts of ref...
Tree Densities and Prediction Models for Plantations and Reforestation-abandoned Sites after Clear Cutting in Kyushu Island,Japan
mixed coniferous-broadleaved forests pioneer tree species prediction models quantification method I species dominating the canopy layer
2009/8/28
We analyzed the species and densities of established tree with height≥1.3m in 59 conifer plantations and 41 reforestation-abandoned sites after clear cutting (i.e. clear-cut sites) on Kyushu Island. N...
Regeneration of Fagus crenata Experimentally Managed by a Shelterwood System 33 or 54 Years after Cutting in Forests with Deciduous Shrub-type Undergrowth in the Tohoku District,Northern Honshu,Japan
Fagus crenata forest floor treatment Kurosawajiri Research Site natural regeneration shelterwood system
2009/8/28
Regeneration of Fagus crenata was examined in the experimental forests managed by a shelterwood system at the Kurosawajiri Research Site, Iwate Prefecture. In a stand where clearing of the forest floo...
Relationship between Dwarf-bamboo Growth and Small Rodents on Mt. Ohdaigahara,Central Japan,with Special Reference to Construction of Deer-proof Fences
deer-proof fence dwarf-bamboo Mt.Ohdaigahara sika deer small rodent
2009/8/28
We examined the relationship between dwarf-bamboo growth and small rodents on Mt. Ohdaigahara where the population density of sika deer (Cervus nippon) has been increasing and trunk debarking by the d...
Construction of a Volume Table for Evergreen Broad-leaved Trees with Pipe Model Theory and Relative Stem Curve: A Case Study in the Tokyo University Forest in Chiba,Japan
branch broad-leaved tree pipe model relative stem curve volume table
2009/8/28
In this paper we constructed a volume table for broad-leaved trees including a stem and branches using a relative stem curve, provided that the trees are subject to the pipe model theory. First we mea...
Developing Methods for Estimating Forest Areas under Article 3.4 of the Kyoto Protocol:A Case Study on Private Lands in Gifu Prefecture,Japan
forest register forest under Article 3.4 Kyoto Protocol silvicultural practices
2009/8/28
This study aims to develop a methodology to account for and identify forests under Article 3.4 of the Kyoto Protocol (forests under Art. 3.4), and then to calculate forest area under Art. 3.4. Forests...
Structure and Growth in an Old-growth Sugi (Cryptomeria japonica) Forest in Akita Prefecture,Northeastern Japan
old-aged forest old-growth sugi forest periodic annual net increment stand structure thinning operation
2009/8/27
Periodic annual net increment of stand volume and stand structure dynamics were analyzed by using data collected in long-term monitoring during a 77-year period in a sugi (Cryptomeria japonica) natura...
Analyzing Annual Rings to Evaluate Past Growth of Natural Cryptomeria japonica Trees in Sado Forest Reserve,Akita Prefecture,Northeastern Japan
Cryptomeria japonica disturbance growth natural Cryptomeria japonica forest regeneration
2009/8/27
We investigated past growth of trees within a natural stand of Cryptomeria japonica in Sado Forest Reserve, Akita Prefecture, northeastern Japan, relating to temporal changes in environmental conditio...
Development of a Meteorological Database System for University Forests in Japan
database meteorological observation university forests XML
2009/8/27
Meteorological data is necessary for long-term ecological research. A readily accessible database of meteorological data observed at individual facilities and study sites would assist researchers. The...
A Beginning of LTER in Japan:Approach from Forest Science。
Basidiomycetous Fungi Associated with Butt Rot Disease of Cryptomeria japonica in the Aso District,Kumamoto Prefecture,Japan
basidiomycetes butt rot disease Cryptomeria japonica Kumamoto Prefecture weight loss
2009/8/27
To clarify the causal fungus of butt rot disease of Cryptomeria japonica (Sugi), we isolated basidiomycetous fungi from decayed stumps in 12 plantations 40 to 83 years old in the Aso district, Kumamot...
Relationship between Stem Density and Interception Ratio for Coniferous Plantation Forests in Japan
conifer evapotranspiration forest management interception evaporation plantation stem density
2009/8/27
Summarizing 12 studies examining interception evaporation from coniferous plantation forests in Japan, we found a positive correlation between stem density and interception ratio. Regressing the corre...
Analysis of Stem Growth Pattern in Japanese Cedar (Cryptomeria japonica) Trees in a Natural Forest in Akita,Northeastern Japan
annual increment of basal area annual increment of volume natural Japanese cedar stem analysis thinning
2009/8/25
The pattern of growth in 10 Japanese cedar (Cryptomeria japonica) trees (age 162 to 255 years) located within a natural forest was analyzed using ring-width data. These trees showed a rapid increase i...