Discussion to Spatial Characteristics on a Sub-tidal Benthic Community Composed to the Complicated Coastal Lines Around Tongyeong, Korea

Abstract

: Around Tongyeong coasts which located in southern coast of Korea composed to the complex coastal line and scattered by small islands. It also has been distributed to a complicated bathymetric structure by several types of channels. This study carried to analyze the spatial characteristics of macrobenthic community and benthic environmental variance on sub-tidal area based on multivariate statistics tools. Sediment composition varied from muddy sand to mud, and along the channels, it composed to a heterogeneous bottoms mixed by shell fragment, cobbles and mud. Organic contents on the surface sediment varied 1.1-3.9%. Total of 272 species, 33,349 ind./m 2 of macrobenthos identified in all of sample area. Polychaetes also prevailed among the specimen. L. longifolia, P. pinnata dominated based on density. Considering on the biomass, echinoderm S. lacunosa, A. tricoides listed. Closer to the coastal area, the density and diversity were higher. Community structure based on cluster analysis was discriminated into three groups. Each group was also characterized by geographical state such as depth, sediment composition. In addition, when applied to the bathymetric data, the channel, which composed to the mixed sediment, made a role of limited factor which characterized to benthic community. Because the specimen around the channel have been affected on the diverse sediment mixture. Most of benthic studies in the southern coast of Korea focused to the condition of benthic organic pollution spatially, because along the coast, it also developed a aquaculture ground and industrial complex. But, as results, most of the area, it turn out the less polluted areas nevertheless similar environment situation. It supposed that benthic community affect to the bottom sediment composition by physical characteristics.

Species composition and community structure of benthic crustacean assemblage around Oryukdo in southeastern waters off Korea

“…, 잠수조사를 통한 제주도 저서무척추 동물 군집에 관한 연구 (Ko et al, 2008;Ko et al, 2011;Ko et al, 2012), 한려해상국립공원 대형저서동 물의 군집에 대한 연구 (Yoon et al, 2009), 우이도 조 하대 춘계와 추계의 대형무척추동물 군집구조에 대한 연구 (Seo et al, 2010), 통영해역 조하대 저서생물에 대한 연구 (Yoon et al, 2010), 독도 암반조간대 무척추 동물군집에 대한 연구 (Cha and (Shannon and Weaver, 1949;Clarke and Warwick, 2001;Pielou, 2014). 통계분석은 PRIMER v5를 이용하여 수 행하였다.…”