한국 서해안 조간대에서의 환경변화에 따른 중형저서동물군집의 다양성

Title
한국 서해안 조간대에서의 환경변화에 따른 중형저서동물군집의 다양성
Alternative Title
The variation of meiofaunal community by change of environment in the tidal flat on West coast of Korea
Author(s)
김동성; 민원기
KIOST Author(s)
Kim, Dong Sung(김동성)
Publication Year
2004-09-25
Abstract
The community structure of major meiobenthos was studied in Chunsu bay on west coast of Korea in april, July and october, 2003. Chunsu bay, one of the famous spawning ground and nursery in west coast of Korea, was reduced to half of the total area and estuary of bay almost disappeared by construction of Seosan A, B dike. So, Chunsu bay is semi-closed and influenced by environmental stress like decreasing inflow of stream and increasing discharge of sewage by coastal development. The samples for analysing benthic micro-organism, benthic diatom and meiobenthic animal were collected using the van-Veen grab and acryl sub-corer at 11 stations in Chunsu bay. To examine feeding habit of major meiofaunal groups, nematodes and harpacticoid copepods at the Hwangdo tidal flats in inner part of Chunsu bay. Grazing rate was measured using a isotope-tracer (3H thymidine, 14C amino acid) method. Time-serial measurement of grazing rate was made to elucidate the effects of day/night and tidal cycle on diel feeding rhythm of the animals. The number of culturable bacteria fluctuated from 1.73±0.25×105 to 18.23±1.17×105 CFU/㎤ during the experimental period, and was highest in october. The numbers of culturable bacteria in the study sites were higher at the station near the entrance of bay than the station of inner part of bay, and fluctuated from 2.12±0.06×106 to 4.27±0.28×106 CFU/㎤ at the the Hwangdo tidal flats in October. Variation of the number of culturable bacteria by tidal rhythm showed higher in day than night time. The Concentration of Chl.a in the sediment at the study site was 18.0~168.2㎎/㎡ in April and 36.6~111.0㎎/㎡ in October. The most abundant meiobenthos was nematodes and followed by sarcomastigophorans, harpacticoid copepods. These Three taxa comprised more than 80% of the total abundance at all stations. For size distribution analyses showed that animals which fit into the sieve mesh size of 0.063mm were abundant. The maximum density of meiobenthos was
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/31762
Bibliographic Citation
일본벤토스학회지, pp.18, 2004
Publisher
일본벤토스학회,플랑크톤학회
Type
Conference
Language
English
Publisher
일본벤토스학회,플랑크톤학회
Related Researcher
Research Interests

Biophysiological ecology,Meiobenthology,해양생물 생리생태학,중형저서생물학

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