Distance decay of community dynamics in rocky intertidal sessile assemblages evaluated by transition matrix models |
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Authors: | Masahiro Tsujino Masakazu Hori Takehiro Okuda Masahiro Nakaoka Tomoko Yamamoto Takashi Noda |
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Institution: | (1) Graduate School of Environmental Earth Science, Hokkaido University, N10W5, Kita, Sapporo Hokkaido, 060-0810, Japan;(2) National Research Institute of Fisheries and Environment of Inland Sea, Fisheries Research Agency, Maruishi 2-17-5, Hatsukaichi Hiroshima, 739-0452, Japan;(3) Tohoku National Fisheries Research Institute, Fisheries Research Agency, Same-machi, Hachinohe Aomori, 031-0841, Japan;(4) Field Science Center for Northern Biosphere, Hokkaido University, N11W10, Kita, Sapporo Hokkaido, 060-0811, Japan;(5) Faculty of Fisheries Sciences, Kagoshima University, Simoarata 4-50-20, Kagoshima Kagoshima, 890-0056, Japan |
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Abstract: | It is well known that the similarity in species composition between two communities decays with the geographic distance that
separates them. It is thus likely that the similarity in the dynamics of two communities also decays with distance, because
the distance–decay relationship is fundamental in nature. However, the distance–decay relationships of community dynamics
have not yet been revealed. We used transition matrix models to evaluate distance–decay relationships of seasonal community
dynamics (from spring to summer) in rocky intertidal sessile assemblages along the Pacific coast of Japan between 31°N and
43°N. We evaluated the distance–decay relationships of whole-community dynamics and of three dynamics-related components—recruitment,
disturbance, and species interaction (competition and facilitation)—for communities separated by distances ranging from several
meters to thousands of kilometers. The similarity of the recruitment dynamics among communities declined rapidly with distance
within the fine spatial scale, but only moderately within larger scales. The similarity of the disturbance dynamics was independent
of distance, and the similarity of species interaction declined slightly with increasing distance. The similarity of whole-community
dynamics declined rapidly with distance at a fine spatial scale and moderately at larger scales. The fact that the distance–decay
relationship of whole-community dynamics was similar to that of recruitment may suggest that recruitment processes are the
most important determinant of spatial variability of community dynamics at our study sites during the study period. |
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Keywords: | Competition Distance–decay relationship Disturbance Pacific coast of Japan Population dynamics Recruitment |
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