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ISSN : 2287-8327

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Vol.37 No.2
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Relation of mortality to DBH and available area in naturally germinated Pinus densiflora populations

Journal of Ecology and Environment / Journal of Ecology and Environment, (P)2287-8327; (E)2288-1220
2014, v.37 no.2, pp.105-111
https://doi.org/10.5141/ecoenv.2014.013
Jun Kato (Kirigamine Plant Research Group, c/o Kato, 1940 Iwamurada, Saku, Nagano 385-0022 Japan)
Yousuke Degawa (Sugadaira Montane Research Center, University of Tsukuba, 1278-294 Sugadaira Kogen, Ueda 386-2204 J)
Jun, K. , & Yousuke, D. (2014). Relation of mortality to DBH and available area in naturally germinated Pinus densiflora populations. Journal of Ecology and Environment, 37(2), 105-111, https://doi.org/10.5141/ecoenv.2014.013
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Abstract

To elucidate whether small diameter at breast height correlates with tree death in an overcrowded tree population, we analyzed self-thinning occurring over the course of 37 years in naturally established Pinus densiflora populations in Sug¬adaira, central Japan. As trees grew, their diameters at breast height increased and the number of trees consequently decreased. Spatial distribution, which was initially clumped, changed accordingly, first becoming random and finally uniform. We calculated the “available area” of individual trees to elucidate the contribution of this parameter to tree mor¬tality. Small diameter at breast height was strongly correlated with tree death, with a slight correlation observed between tree death and small available area of individual trees.

keywords
available area, diameter at breast height, Pinus densiflora

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