Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Changes of Tissue N Content and Community Structure of Macroalgae on Intertidal Rocky Shores in Tongyeong Area due to Sewage Discharge

통영 지역의 암반 조간대에서 배출수 유입으로 인한 해조 군집 구조와 엽체 내 질소 함량의 변화

  • Kang, Yun-Hee (Marine Research Institute, Pusan National University) ;
  • Park, Sang-Rul (Department of Biological Science, Pusan National University) ;
  • Oak, Jung-Hyun (Marine Research Institute, Pusan National University) ;
  • Lee, Jin-Ae (School of Environmental Science and Engineering, Inje University) ;
  • Chung, Ik-Kyo (Division of Earth Environmental System, Pusan National University)
  • 강윤희 (부산대학교 해양연구소) ;
  • 박상률 (부산대학교 생명과학과) ;
  • 옥정현 (부산대학교 해양연구소) ;
  • 이진애 (인제대학교 환경공학부) ;
  • 정익교 (부산대학교 지구환경시스템학부)
  • Published : 2009.06.30
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Abstract

Enrichment in nutrients coming from urban sewage outfalls can lead to eutrophication in coastal areas, which can also change the species composition and community structure of macro algal communities. We investigated the structure of the macro algal community within three rocky shores in order to assess any possible differences in their characteristics. Site 1 was located near Tongyeong city's sewage outfall, Site 2 was located near a public beach area, and Site 3 faced open channel of the Ocean. All three sites were located within the same stretch of the coast, where Site 2 was located between sites 1 and 3. We measured the nutrient concentration in water and the tissue nitrogen content in macro algae samples. Nutrients in the water column surrounding site 1 were high in ammonium ($30.2\pm1.8{\mu}M$), nitrate ($26.2{\pm}0.1{\mu}M$), and phosphate ($2.7{\pm}0.1{\mu}M$) content, and were characterized by low numbers of macroalgal species and species and a low species diversity index. In contrast, site 3 exhibited relatively low nutrient concentration levels and a high number of macroalgal species and a high species diversity index. Comparative analysis showed that the tissue nitrogen content of macroalgae were significantly (P<0.05) affected by the nutrient concentration in the water column. The tissue nitrogen content of green algae within site 1 was higher than the others sites. However, the tissue nitrogen content of brown algae was similar at all three sites. Thus, the tissue nitrogen content of macro algae and the macro algal community structure of intertidal rocky shores were dependent on location and the performance of macroalgal communities was dependent on water quality.

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References

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