북동태평양 한국 망간단괴 광구해역에서 환경충격 시험지역과 보존지역간의 수층환경 및 침강입자 플럭스 유사성 비교 = Evaluation of Similarity of Water Column Properties and Sinking Particles between Impact and Preserved Sites for Environmental Impact Assessment in the Korea Contracted Area for Manganese Nodule Development, NE Pacific

다국어 초록 (Multilingual Abstract)

Verifying the similarity of environmental characteristics between an artificial impact site and a preserved or reference site is necessary to quantitatively and qualitatively evaluate the environmental impact of mining activity. Although an impact site (BIS station) and a preserved site (called KOMO station) that have been selected in the Korea manganese nodule contract area may share similar environmental characteristics, similarities in terms of the water column environment between both sites has not been investigated. In this study, we compared the chemical properties of the water columns and sinking particle fluxes between BIS and KOMO stations through two observations (August 2011 and September 2012). Additionally, we observed particle fluxes at the KOMO station for five years (July 2003~July 2008) to understand long-term natural variability. Vertical distributions of water column properties such as dissolved oxygen, inorganic nutrients (N, P, Si), total organic carbon below surface layer (within the depth range of 200 m) were not considerably different between the two sites. Especially, values of water column parameters in the abyssopelagic zone from 4000 m to bottom layer (~5000 m) were very similar between the BIS and KOMO sites. Sinking particle fluxes from the two sites also showed similar seasonality. However, natural variation of particle flux at the KOMO site varied from 3.5 to 129.9 mg m−2 day−1, with a distinct temporal variation originating from ENSO events (almost forty times higher than a minimum value). These results could provide valuable information to more exactly evaluate the environmental impact of mining activity on water columns.

참고문헌 (Reference)

1 손주원, "북동태평양 적도 Thermocline Ridge 해역에서 영양염(질소, 인, 규소)과 유기탄소(용존 및 입자)의 분포 특성 및 연간 변화" 한국해양과학기술원 33 (33): 55-68, 2011

2 Van Dover CL, "Tighten regulations on deep-sea mining" 470 : 31-33, 2011

3 MLTM, "The report of deep sea mineral resources development (3rd level): precision environments" Korea Ocean Research and Development Institute 69-, 2011

4 Thiel H, "The large-scale environmental impact experiment DISCOL-reflection and foresight" 48 : 3869-3882, 2001

5 Trueblood DD, "The ecological impacts of the joint US-Russian benthic impact experiment" 139-145, 1997

6 Glover AG, "The deep-sea floor ecosystem:current status and prospects of anthropogenic change by the year 2025" 30 (30): 219-241, 2003

7 Brzezinski MA, "The Si:C:N ratio of marine diatoms:interspecific variability and the effect of some environmental variables" 21 : 347-357, 1985

8 Honjo S, "Sedimentation of biogenic matter in the deep ocean" 29 : 609-625, 1982

9 Sharma R, "Sediment redistribution during simulated benthic disturbance and its implications on deep seabed mining" 48 : 3363-3380, 2001

10 Haake B, "Seasonality and interannual variablty of particle fluxes to the deep Arabian Sea" 40 : 1323-1344, 1993

11 Hyung Jeek Kim, "Seasonal variations of particle fluxes in the northeastern equatorial Pacific during normal and weak El Niño periods" 한국지질과학협의회 14 (14): 415-422, 2010

12 Schriever G, "Seafloor macrofauna in potential mining areas: Parameters for assessment, recommended techniques and levels of replication" 326-368, 2002

13 Quan TM, "Redox control of N:P ratios in aquatic ecosystems" 7 : 124-139, 2009

14 Anderson LA, "Redfield ratios of remineralization determined by nutrient data analysis" 8 : 65-80, 1994

15 Pennington JT, "Primary production in the eastern tropical Pacific: a review" 69 : 285-317, 2006

16 Berelson WM, "Particle settling rates increase with depth in the ocean" 49 : 237-251, 2002

17 Oebius HU, "Parametrization and evaluation of marine environmental impacts produced by deep-sea manganese nodule mining" 48 : 3453-3467, 2001

18 Karstensen J, "Oxygen minimum zones in the eastern tropical Atlantic and Pacific ocean" 77 : 331-350, 2008

19 Paulmier A, "Oxygen minimum zones (OMZs) in the modern ocean" 80 : 113-128, 2009

20 Hill JK, "Organic carbon and nitrogen in the northern California current system: Comparison of offshore, river plume and coastally upwelled waters" 53 : 369-387, 2002

21 Doval MD, "Organic carbon and apparent oxygen utilization in the western south and the central Indian Ocean" 68 : 249-264, 2000

22 Yamazaki T, "Optical determination of the JET deep sea sediment disturbance" 153-168, 1997

23 Wada E, "Nitrogen in the sea: Forms, Abundances and Rate processes" CRC Press 71-75, 1991

24 Nath BN, "Monitoring the sedimentary carbon in an artificially disturbed deepsea sedimentary environment" 184 : 2829-2844, 2012

25 Romero-Centeno R, "Midsummer gap winds and low-level circulation over the Eastern Tropical Pacific" 20 : 2007

26 El-Sayed SZ, "Marine Geology and Oceanography of the Pacific Manganese Nodule Province" 241-286, 1979

27 SPC, "Manganese nodules, a physical, biological, environmental, and technical review, Vol 1B" Secretariat of the Pacific Community (SPC) 2013

28 Yamada H, "Japan's ocean test of the nodule mining system" 13-19, 1998

29 Kim HJ, "Influence of ENSO variability on sinking-particle fluxes in the northeastern equatorial Pacific" 58 : 865-874, 2011

30 Muthunayagam AE, "Indian polymetallic nodule program" 1-5, 1999

31 Parthiban G, "Increased particle fluxes at the INDEX site attributable to simulated benthic disturbance" 18 : 223-235, 2000

32 Kim HJ, "Impact of strong ElNiño events (1997/98 and 2009/10) on sinking particle fluxes in the 10oN thermocline ridge area of the northeastern equatorial Pacific" 67 : 111-120, 2012

33 Rodrigues N, "Impact of benthic disturbance on megafauna in Central Indian Basin" 48 : 3411-3426, 2001

34 Fiedler PC, "Hydrography of the eastern tropical Pacific: a review" 69 : 143-180, 2006

35 Markussen JM, "Green Global Yearbook of International Co-operation on Environment 1994" Oxford University Press 31-39, 1994

36 Khripounoff A, "Geochemical and biological recovery of the disturbed seafloor in polymetallic nodule fields of the Clipperton-Clarion Fracture Zone (CCFZ) at 5000 m depth" 51 (51): 2033-2041, 2006

37 Thiel H, "From Meseda to DISCOL: a new approach to deep-sea mining risk assessments" 10 : 369-386, 1992

38 Honjo S, "Export production of particle to the interior of the equatorial Pacific Ocean during the 1992 EqPac experiment" 42 : 831-870, 1995

39 Ozturgut E, "Environmental investigation during manganese nodule mining tests in the North Equatorial Pacific in November 1978" NOAA 50-, 1980

40 Chung JS, "Effect of particle size and concentration on pressure gradient in two-phase vertically upward transport" 132-138, 2001

41 Karl DM, "Ecosystem changes in the North Pacific subtropical gyre attributed to the 1991-92 El Nino" 373 : 230-234, 1995

42 Yang EJ, "Distribution and structure of heterotrophic protest communities in the northeast equatorial Pacific Ocean" 146 : 1-15, 2004

43 McGee D, "Deglacial changes in dust flux in the eastern equatorial Pacific" 257 : 215-230, 2007

44 Sharma R, "Deep-sea impact experiments and their future requirements" 23 : 331-338, 2005

45 Schriever G, "DISCOL-precautionary large scale environmental impact studies for future polymetallic nodule mining from the deep sea" 1311-1319, 1992

46 Schriever G, "DISCOL-precautionary environmental impact studies for future manganese nodule mining and first results on meiofauna abundance" 4 : 47-57, 1991

47 Yamada A, "Combined analysis of ecology and economy of manganese nodule mining" 73-79, 2009

48 Millero FJ, "Chemical oceanography" CRC Press 266-277, 2006

49 Bostock HC, "Characterising the intermediate depth waters of the Pacific Ocean using δ13C and other geochemical tracers" 57 : 847-859, 2010

50 Chavez FP, "Biological and chemical response of the equatorial Pacific ocean to the 1997-1998 El Nino" 286 : 2126-2131, 1999

51 Dymond J, "Biogenic particle fluxes in the equatorial Pacific: evidence for both high and low productivity during the 1982-83 El Nino" 2 : 129-137, 1988

52 Amador JA, "Atmospheric forcing of the eastern tropical Pacific: a review" 69 : 101-142, 2006

53 Talley LD, "An Okhotsk Sea-water anomaly-implications for ventilation in the North Pacific" 38 : 171-190, 1991

54 Jiang MS, "A nitrate and silicate budget in the equatorial Pacific Ocean: a couple physical-biological model study" 50 : 2971-2996, 2003

55 Parsons TR, "A manual of chemical and biological methods for seawater analysis" Pergamon Press 173-, 1984

56 Sugimura Y, "A high-temperature catalytic oxidation method for the determination of non-volatile dissolved organic carbon in seawater by direct injection of a liquid sample" 24 : 105-131, 1988

57 Mengerink KJ, "A call for deep-ocean stewardship" 344 : 696-698, 2014