Testing a method for reconstructing structural development of even-aged Abies sachalinensis stands |
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Authors: | Akira Osawa Nahoko Kurachi Yojiro Matsuura Mayuko Jomura Yoichi Kanazawa Masaru Sanada |
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Institution: | (1) Faculty of Intercultural Communication, Ryukoku University, Ohtsu, Japan;(2) Hiraoka Forest Institute, Ohtsu, Japan;(3) Forestry and Forest Products Research Institute, Tsukuba, Japan;(4) Graduate School of Natural Sciences, Kobe University, Kobe, Japan;(5) Hokkaido Research Center, Forestry and Forest Products Research Institute, Sapporo, Japan |
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Abstract: | Accuracy of a stand reconstruction technique was examined by comparing the estimated values of the aboveground biomass, total
stem volume, stem volume growth, and stand density of Abies sachalinensis stands to those observed between 1980 and 1998 in Hokkaido, northern Japan. Census data from two stands established in 1973,
one fertilized and the other unfertilized, were used for the examination. The stand statistics in the past were estimated
from the DBH and height of individual trees measured in 1998, data on the aboveground biomass and stem volume with bark for
nine living trees of various sizes harvested in each plot in 1998 or in 1999, and data from the stem analysis of the same
harvested trees. We showed that the reconstructed patterns of the frequency distribution in aboveground biomass and in stem
volume were generally the same as those observed in both plots and in any year in the past (except for 1982 and/or 1980),
and that the reproduced patterns of stand development over time were similar to those observed directly in the past. Accuracy
in predicting stand statistics was generally in the order of ±10% relative error. We consider that the present method of stand
reconstruction could be used to estimate aboveground biomass, total stem volume, and stem volume growth of a stand in the
past. Interpretation of results for the early years (1982 and 1980) and for the stand density requires caution. |
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Keywords: | Abies sachalinensis Aboveground biomass Size distribution Stand reconstruction Stand structure |
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