| 要旨トップ | 日本生態学会全国大会 ESJ55 講演要旨


一般講演(ポスター発表) P2-150

行列モデルによる岩礁潮間帯群集の遷移動態の解析

*辻野昌広,野田隆史(北海道大),山本智子(鹿児島大),仲岡雅裕(千葉大),堀正和(瀬戸内水研)

Transition matrix models are a valuable tool for describing community succession. We use "succession" to refer to changes in community composition over time. Transition matrix models describe dynamics of succession well. Furthermore, several features of succession dynamics can be quantified using these models.

We measured community properties of succession in rocky intertidal sessile assemblages. Transition matrices are constructed based on a long-term (2002-7) study at Donan region of the Pacific coast of Japan.

Successional properties are determined via the following steps. First, field censuses were done at five shores at intervals of one year; multiple fixed points were placed on the rock and the species present at each point was recorded. After that, species present each point were compared with the species present at the following census, transition probabilities between each species pair was calculated, and then a transition probability matrix was obtained. Finally, successional properties such as disturbance rate, colonization rate, replacement rate, predictability of succession, turnover rate and time, and dumping ratio of convergence were determined.

In this presentation, we outline the feature of the properties of succession dynamics in this habitat. Additionally, we will discuss the traits of succession in relation to environmental aspects.

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