| 要旨トップ | 目次 | 日本生態学会第59回全国大会 (2012年3月,大津) 講演要旨
ESJ59/EAFES5 Abstract


一般講演(ポスター発表) P2-212A (Poster presentation)

Secular changes of macrobenthos distributions and environmental conditions on Tamagawa estuary; 2006 to 2010

*Masumoto, T.(Chiba Prefectural Univ. of Health Sci.), Saito, H.(National Res. Ins. of Fisheries Eng.), Shirai, K.(Yokohama Port and Airport Tech. Inv. Office), Nakamura, T.(JAPAN NUS Co.,Ltd.), Furudono, T.; Kazama, M.(IDEA Consultants, Inc.), Suyama, N.; Aida M.(Doris Japan Co., Ltd), Nishi, E.(YOKOHAMA National Univ.), Kurozumi, T.; Komai, T.(Natural History Muse. and Ins., Chiba), Tomikawa, K.(Hiroshima Univ.), Nakayama, S.; Taru, M.; Furota T.(TOHO Univ.)

To find out environmental impacts on the biodiversity after the large-scale landfill executed from 2007, the annual succession of the benthic macrofauna was monitored in the lower Tamagawa River, adjacent to the Haneda International Airport at the innermost of Tokyo Bay.

During this study conducted from 2007 to 2010, a total of 267 samples were taken. In each sample, 0.1m2 and 10 cm (in subtidal) or 30 cm (in tidal flat) deep sediment was collected, then, sieved with a 1 mm mesh. All animals remained on the sieve were collected. After identified, number of individuals and wet weight of each species were estimated.

Since 2007, as a consequence from nMDS analyses with Bray-Curtis similarity indices, the overall structure of the macrofauna has showed no remarkable change, while some dominant species seemed to alter their spatial patterns annually.


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