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We have studied the photosynthetic production and growth of Thujopsis dolabrata var. hondai (hiba) seedlings under typical light conditions found in mixed forests, including constant shade, phenological gaps under broad-leaved trees with different lengths of foliation period, and in an open plot. Leaves sampled from the open plot had significantly higher(More)
This research work aims at application of sensing and mapping technology which has been developed with mobile robotics to equipment measurement of forest trees. One of the key information for forest management in artificial forest is the records of the tree sizes and standing timber volume of a unit area. The authors made measurement equipment as trial(More)
The stand density of a forest affects the vertical distribution of foliage. Understanding the dynamics of this response is important for the study of crown structure and function, carbon-budget estimation, and forest management. We investigated the effect of tree density on the vertical distribution of foliage, branch, and stem growth, and ratio of biomass(More)
Besides stem temperature, seasonality and vertical gradient in stem diameter growth strongly affect both seasonal and vertical variations in stem CO 2 efflux. Stem CO2 efflux (E s) is known to vary seasonally and vertically along tree stems. We measured E s at various heights in a 50-year-old hinoki cypress [Chamaecyparis obtusa (Sieb. et Zucc) Endl.] stand(More)
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