인천항 내, 외에서 식물플랑크톤 위해종의 분포특성

국문 초록 (Abstract)

인천항에서 선박평형수 배출수에 기인한 외래종을 고려한 항만환경 관리수준 설정을 위해 식물플랑크톤의 잠재적 위해종 출현 특성과 관련된 환경영향 요인을 2007년 2월부터 2009년 11월까지 인천항 내측 및 외측에서 계절조사를 수행하였 다. 조사결과, 한국 주변해역에서 출현한 바 있는 식물플랑크톤 62종이 관찰되었고, 그 중에 적조원인종 13종과 독소생산종 7종의 잠재적 위해종이 관찰되었다. 잠재적 위해종은 여름철과 겨울철에 인천항 외측에서 더 다양하게 출현하였다. 봄과 겨 울철에는 적조원인종인 Skeletonema spp., Thalassiosira nordenskioldii, Paralia sulcata가 항만 내측 (평균 72.4%) 및 외측 (평균 77.6%)에서 모두 우점 하였고, 수소이온과 부유물질의 농도와 양의 상관관계를 나타냈다(p<0.05). 여름철에는 인천항 내측에서 적조원인종(Skeletonema spp.) 및 독소생산종(Alexandrium catanella, A. tamarense, Dinophysis acuminata, Pseudo-nitzschia spp.)이 혼합 우점 (평균 74.2%) 하였으나, 외측에서는 Skeletonema spp.와 P. sulcata가 우점 (평균 67.2%) 하였다. 연구기간 동안 출현한 독소생산종 들은 용존 무기질산염, 규산염, 인산염 및 화학적 산소요구량과 양의 상관관계를 나타냈다(p<0.05). 식물플랑크톤 엽록소-a 농도는 봄과 여름 및 가을철에 인천항 외측에서 각각 평균 3.05 ㎍/L, 1.49 ㎍/L, 5.46 ㎍/L로 내측보다 3-5배 높은 농도가 높았고, 겨울철에는 내측 (평균 0.94 ㎍/L) 및 외측 (평균 0.95 ㎍/L) 간 농도 차이가 없었다. 요약하면, 인천항 외측은 다양한 적조원인종이 우점하며 엽록소-a 농도가 높았으나, 항만 내측은 여름철 독소생산종 의 출현 종수가 높게 나타났고, 외측에 비해 엽록소-a 농도가 낮았다. 각 위해종들의 대 발생 가능성은 영양염, 화학적 산소요 구량 및 부유물질의 농도와 비례한 것으로 나타나, 항만 내, 외측의 환경특성을 고려한 잠재적 위해종 관리가 요구된다.

다국어 초록 (Multilingual Abstract)

This study examined the occurring pattern of potential risky species and the related abiotic factors for port-specific environmental management considering the control of ballast water-induced foreign species at Incheon seaport. From a total of 62 species observed during the study, 13 red-tide and 7 toxic phytoplankton, normally occurring species in Korean waters, occurred from the seasonal investigation at the inner and outer sites of the Incheon seaport from 2007 to 2009. The number of potential risky phytoplankton was relatively high at the outer site of the port during summer and winter. Red-tide species, such as Skeletonema spp., Thalassiosira nordenskioldii, and Paralia sulcata, dominated the total standing crops at the inner site (avg. 72.4%) and outer site (avg. 77.6%) in spring and summer, being positively correlated with the concentrations of total suspended solids (TSS) and pH (p<0.05). In summer, the red-tide species (Skeletonema spp.) and toxic species (Alexandrium catenella, A. tamarense, Dinophysis acuminata and Pseudo-nitzschia spp.) co-dominated (avg. 74.2%) at the inner site, while Skeletonema spp. and P. sulcata predominated (avg. 67.2%) at the outer site. During the study periods, the toxic species were significantly and positively correlated with the chemical oxygen demand (COD), dissolved inorganic nitrogen, silicate and phosphate (p < 0.05). The chlorophyll-a (chl-a) concentration of phytoplankton at the outer site ranged from 1.49 to 5.46 ㎍/L on average, which was 3-5 times higher than that at the inner site in spring, summer and autumn, whereas there was no difference in the concentration between inner (avg. 0.94 ㎍/L) and outer (avg. 0.95 ㎍/L) sites in winter. In summary, diverse red-tide species dominated and a relatively high chl-a concentration existed at the outer site, whereas a relatively high number of toxic species and low chl-a concentration was observed at the inner site in summer. The potential risky species can outbreak in association with the concentration of nutrients, COD and TSS, suggesting that distinctive management of potential risky species is needed considering the environmental characteristics of Incheon seaport.

참고문헌 (Reference)

1 권오윤, "항만 환경에서 식물플랑크톤 잠재적 위해종의 분포" 한국산학기술학회 14 (14): 506-510, 2013

2 강정훈, "잠재적 위해종인 야광충의 항만 분포 특성과 수용능력" 한국해양과학기술원 32 (32): 449-462, 2010

3 G. T. BOALCH, "Unusual diatom off the coast of south-west England and its effect on fishing" Nature Publishing Group 269 (269): 687-688, 1977

4 GM Hallegraeff, "Transport of toxic dinoflagellates via ships' ballast water:bioeconomic risk assessment and efficacy of possible ballast water management strategies" Inter-Research Science Center 168 : 297-309, 1998

5 T. J. Smayda, "Toxic marine phytoplankton" Elsevier 1990

6 신현호, "The First Appearance of Toxic Dinoflagellate Alexandrium tamarense (Gonyaulacales, Dinophyceae) Responsible for the PSP Contaminations in Gamak Bay, Korea [Note]" 한국조류학회I 23 (23): 251-255, 2008

7 MARK A. BRZEZINSKI, "Silica production in the Monterey, California, upwelling system" Wiley-Blackwell 42 (42): 1694-1705, 1997

8 A Calvo-Díaz, "Seasonal dynamics of picoplankton in shelf waters of the southern Bay of Biscay" Inter-Research Science Center 42 : 159-174, 2006

9 Theodore J. Smayda, "Reflections on the ballast water dispersal—harmful algal bloom paradigm" Elsevier BV 6 (6): 601-622, 2007

10 D. M. Anderson, "Red tides: biology, environmental science and toxicology" Elsevier 1989

11 JE Cloern, "Phytoplankton community ecology: principles applied in San Francisco Bay" Inter-Research Science Center 285 : 11-28, 2005

12 G. M. Hallegraeff, "Physiological Ecology of Harmful Algal Blooms" Springer-Verlag 261-287, 1998

13 E. L. Lilly, "Paralytic shellfish poisoning toxins in France linked to a human-introduced strain of Alexandrium catenella from the western Pacific: evidence from DNA and toxin analysis" 24 : 443-452,

14 M. S. Han, "Occurrence of dinoflagellate Alexandrium tamarense, a causative organism of paralytic shellfish poisoning in Chinhae bay, Korea" 14 : 1581-1592, 1992

15 J. C. Goldman, "Nitrogen in the marine environment" Academic Press 2008

16 G. A. Tarran, "Microbial community structure and standing stocks in the NE Atlantic in June and July of 1996" 48 : 963-985, 2001

17 J. W. Nybakken, "Marine Biology" Benjamin Cummings 2005

18 G. M. Hallegraeff, "Manual on Harmful Marine Microalgae" UNESCO Publishing 2003

19 Timothy Ault, "Influence of nutrient availability on phytoplankton growth and community structure in the Port Adelaide River, Australia: bioassay assessment of potential nutrient limitation" Springer Science + Business Media 429 (429): 89-103, 2000

20 N. N. Rabalais, "Global change and eutrophication of coastal waters" 66 : 1528-1537, 2009

21 J.-S. Yoo, "Fluctuation of phytoplankton biomass and primary productivity in closed marine ecosystem, Inchon Dock" 35 (35): 323-332, 1992

22 J.-S. Yoo, "Characteristics of physicochemical factors of Incheon dock ecosystem, Korea" 20 (20): 61-68, 1997

23 M. Edwards, "Case history and persistence of the non-indignous diatom Coscinodiscus wailesii in the north-east Atlantic" 81 : 207-211, 2001

24 I.-K. Lee, "Annual fluctuations of physicochemical factors in Incheon dock, Korea" 9 : 88-103, 1991

25 J. H. Lee, "Annual dynamics of phytoplankton diatoms in Incheon dock" 6 : 69-82, 1991

26 T. R. Parsons, "A manual of chemical and biological methods for seawater analysis" Pergamon press 1984

27 조은섭, "2004년 한국 남해연안 해역에 출현하는 식물플랑크톤의 시·공간적 특성 조사" 한국환경과학회 15 (15): 539-562, 2006