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The carrying capacity of yield is\\nexplicitly defined as a function of biological time, so that it is concluded that the\\ncarrying capacity increases exponentially with increasing biological time. 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Time-trajectory of Mean Phytomass and Density in Self-thinning Plant Populations
http://hdl.handle.net/20.500.12000/11818
http://hdl.handle.net/20.500.12000/118182c51be7f-e05b-4ac7-a991-63d13e0447da
名前 / ファイル | ライセンス | アクション |
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No70p099.pdf
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Item type | デフォルトアイテムタイプ(フル)(1) | |||||||||
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公開日 | 2009-08-13 | |||||||||
タイトル | ||||||||||
タイトル | Time-trajectory of Mean Phytomass and Density in Self-thinning Plant Populations | |||||||||
言語 | en | |||||||||
作成者 |
Hagihara, Akio
× Hagihara, Akio
× 萩原, 秋男
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アクセス権 | ||||||||||
アクセス権 | open access | |||||||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
内容記述 | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | Reconciling the competition-density (C-D) effect observed at a particular moment\nin time with the 3/2 power law of self-thinning observed over time, a model for\ndescribing the time-trajectory of mean phytomass w and density p (briefly, the w-p\ntrajectory) during the course of self-thinning is theoretically derived. The model gives\na consistent, full explanation of the w-p trajectories of populations starting with any\ninitial density. The larger value of the relative mortality rate with respect to biological\ntime of a population, which is governed by the 3/2 power law of self-thinning, plays an\nimportant role in relieving the C-D effect, so that the w-p trajectories asymptotically\napproach the self-thinning line on logarithmic coordinates at the earlier stage of\ngrowth. The survivorship curve is divided into three types owing to initial density:\nlogistic, exponential and cologistic types of decrease. All populations tend to decrease\nexponentially in number at the same rate of relative mortality after a sufficient lapse of\ntime, irrespective of their initial density. The populations decreasing exponentially in\nnumber follow the 3/2 power law of self-thinning. The carrying capacity of yield is\nexplicitly defined as a function of biological time, so that it is concluded that the\ncarrying capacity increases exponentially with increasing biological time. An\napproximated expression of the model for the w-p trajectory is proposed and is\nconfirmed to mimic well the time-trajectories of mean stem volume and density during\nthe development of eastern white pine (Pinus strobus L.) plantations. | |||||||||
内容記述 | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | 紀要論文 | |||||||||
出版者 | ||||||||||
言語 | ja | |||||||||
出版者 | 琉球大学理学部 | |||||||||
言語 | ||||||||||
言語 | eng | |||||||||
資源タイプ | ||||||||||
資源タイプ | departmental bulletin paper | |||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
出版タイプ | ||||||||||
出版タイプ | VoR | |||||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
識別子 | ||||||||||
識別子 | http://hdl.handle.net/20.500.12000/11818 | |||||||||
識別子タイプ | HDL | |||||||||
収録物識別子 | ||||||||||
収録物識別子タイプ | ISSN | |||||||||
収録物識別子 | 0286-9640 | |||||||||
収録物識別子 | ||||||||||
収録物識別子タイプ | NCID | |||||||||
収録物識別子 | AN00250774 | |||||||||
収録物名 | ||||||||||
言語 | ja | |||||||||
収録物名 | 琉球大学理学部紀要 | |||||||||
収録物名 | ||||||||||
言語 | en | |||||||||
収録物名 | Bulletin of the College of Science. University of the Ryukyus | |||||||||
書誌情報 |
号 70, p. 99-112, 発行日 2000-09 |