tailieunhanh - Nematode diversity patterns at different spatial scales in the Tien Yen estuary, Quang Ninh province, Vietnam

In this study we investigated the spatial patterns of nematode communities on different horizontal scales in the Tien Yen Estuary. More specifically, we wanted to address the following question: what is the contribution of different spatial scales on the total nematode biodiversity for this area? | HỘI NGHỊ KHOA HỌC TOÀN QUỐC VỀ SINH THÁI VÀ TÀI NGUYÊN SINH VẬT LẦN THỨ 6 NEMATODE DIVERSITY PATTERNS AT DIFFERENT SPATIAL SCALES IN THE TIEN YEN ESTUARY, QUANG NINH PROVINCE, VIETNAM NGUYEN THI XUAN PHUONG, NGUYEN DINH TU, NGUYEN VU THANH Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology VANREUSEL A. Ghent University There is a strong relationship between spatial scale and the processes that influences diversity; and this relationship has been a fascinating topic to ecologists. The level of diversity within a particular habitat has been defined as alpha-diversity or local diversity (Whittaker, 1972). A comparison of diversity (or the change in species diversity) between these habitats is considered as beta-diversity (habitat turnover diversity); and a measure of the overall diversity within a large region is gamma diversity or regional diversity (Whittaker, 1972). Understanding the biodiversity patterns requires the identification of the drivers that generate these patterns and of the biodiversity components that respond to these drivers. The drivers of alpha- and beta- diversities are different, as alpha-diversity is generally associated with high abundance and high resource availability, whereas beta-diversity is more sensitive to the heterogeneity of the habitat. Therefore, it is known that diversity varies with spatial scales in which an increase in scale could promote an increase in diversity due to providing more resources to species (Crawley & Harral, 2001). The spatial patterns of nematode communities on different horizontal scales have been extensively investigated in different estuaries from temperate regions (Boucher & Lambshead, 1995; Adão et al., 2009; Alvesa et al., 2009). However the effect of spatial scales on diversity of nematode assemblage in tropical region has been poorly studied. In this study we investigated the spatial patterns of nematode communities on different horizontal scales in the Tien Yen .

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