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Similarity of rocky intertidal assemblages along the Pacific coast of Japan : effects of spatial scales and geographic distance

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/13476

Title: Similarity of rocky intertidal assemblages along the Pacific coast of Japan : effects of spatial scales and geographic distance
Authors: Nakaoka, M. Browse this author
Ito, N. Browse this author
Yamamoto, T. Browse this author
Okuda, T. Browse this author
Noda, T.5 Browse this author →KAKEN DB
Authors(alt): 野田, 隆史5
Keywords: Geographic distance
Hierarchical design
Marine benthic organisms
Multivariate analyses
Pacific coast of Japan
Issue Date: May-2006
Publisher: Springer
Journal Title: Ecological Research
Volume: 21
Issue: 3
Start Page: 425
End Page: 435
Publisher DOI: 10.1007/s11284-005-0138-6
Abstract: Factors and processes affecting community structures operate at various spatial and temporal scales. We analyzed how similarities of rocky intertidal assemblages vary at different spatial scales using a nested, hierarchical sampling design. Intertidal assemblages consisting of algae, sessile animals, and mobile animals were censused on five rock walls at each of five shores chosen within each of six regions along the Pacific coast of Japan, encompassing 1,800 km of coastlines. Based on this sampling design, similarities in assemblages were calculated using both qualitative (presence/absence) and quantitative (percent cover and density) data, and compared at three spatial levels: (1) rock level (the finest spatial scale, encompassing several to hundreds of meters), (2) shore level (the intermediate spatial scale, encompassing several to tens of kilometers), and (3) region level (the broadest spatial scale, encompassing hundreds to thousands of kilometers). Cluster analysis showed that assemblages were categorized into distinct regional groups except for the two southern regions, but they did not separate clearly from each shore. A nested analysis of similarities revealed significant variation in similarities among regions and among shores within each region, with the former showing greater variation. Similarity was negatively correlated with geographic distance at the regional level but not at the shore or the rock levels. At the regional level, similarity decreased more rapidly with distance for mobile animals than sessile organisms. The analyses highlighted the importance of broad-scale abiotic/biotic factors such as oceanic current conditions and biogeographic factors in determining observed patterns in similarity of rocky intertidal assemblages.
Rights: The original publication is available at www.springerlink.com
Relation: http://www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/13476
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 野田 隆史

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