적도수렴대의 위치변화에 따른 북동태평양 적도해역의 부유성 유공충 군집의 계절변동
Seasonal Variation of Planktonic Foraminifera Assemblage in response to Seasonal Shift of Inter-Tropical Convergence Zone in the Northeastern Equatorial Pacific
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
A time-series sediment trap was operated at a water depth of 4950 m from July 2003 to May 2004 at KOMO station (10o30'N, 131o20'W) in the northeastern equatorial Pacific, with the aim of understanding the temporal variation of planktonic foraminifera assemblages in response to the seasonal shift of Inter-Tropical Convergence Zone (ITCZ). A total of 22130 planktonic foraminifera specimens belonging to 30 species and 11 genera were identified, which shows a distinct seasonal variation with high values (125~288 specimens m−2 day−1) in the winter to spring (December-May) and low values (16~23 specimens m−2 day−1) in the fall (September-November). In addition, seasonal ecological differences of foraminifera assemblages are distinctly recognizable: omnivorous foraminifera occurred predominantlyduring the summer season, whereas herbivorous ones were dominant during the winter season. Such seasonal variations correspond to the seasonal shift of the ITCZ. Enhanced occurrence of herbivorous species during the winter-spring season seems a result of surface water mixing generated by the southward shift of the ITCZ. The increase in omnivorous species during the summer season may be due to the northward movement of the ITCZ caused by weakened wind speed, resulting in the intensification of water column stratification and nutrient-poor environment. A significant reduction of planktonic foraminifera specimens during the fall is attributed to heavy precipitation and reduction in light intensity.
Abstract
A time-series sediment trap was operated at a water depth of 4950 m from July 2003 to May 2004 at KOMO station (10o30'N, 131o20'W) in the northeastern equatorial Pacific, with the aim of understanding the temporal variation of planktonic foraminifera assemblages in response to the seasonal shift of Inter-Tropical Convergence Zone (ITCZ). A total of 22130 planktonic foraminifera specimens belonging to 30 species and 11 genera were identified, which shows a distinct seasonal variation with high values (125~288 specimens m−2 day−1) in the winter to spring (December-May) and low values (16~23 specimens m−2 day−1) in the fall (September-November). In addition, seasonal ecological differences of foraminifera assemblages are distinctly recognizable: omnivorous foraminifera occurred predominantlyduring the summer season, whereas herbivorous ones were dominant during the winter season. Such seasonal variations correspond to the seasonal shift of the ITCZ. Enhanced occurrence of herbivorous species during the winter-spring season seems a result of surface water mixing generated by the southward shift of the ITCZ. The increase in omnivorous species during the summer season may be due to the northward movement of the ITCZ caused by weakened wind speed, resulting in the intensification of water column stratification and nutrient-poor environment. A significant reduction of planktonic foraminifera specimens during the fall is attributed to heavy precipitation and reduction in light intensity.
참고문헌 (38)
- Amador JA, "Atmospheric forcing of the eastern tropical Pacific: A review", Prog Oceanogr, 69, pp.101~142 (2006)
- Andreasen DJ, "Tropical Pacific Ocean thermocline depth reconstructions for the Last Glacial Maximum", Paleoceanography, 12(3), pp.395~413 (1997)
- Barber RT, "Primary productivity and its regulation in the equatorial Pacific during and following the 1991-1992 El Niño", Deep-Sea Res Pt II, 43, pp.933~969 (1996)
- Bijma J, "Temperature and salinity limits for growth and survival of some planktonic foraminifers in laboratory cultures", J Foramin Res, 20(2), pp.95~116 (1990)
- Chaisson WP, "Planktonic foraminiferal assemblages and paleoceanographic change in the trans-tropical Pacific Ocean: A comparison of west (Leg 130) and east (Leg 138)", latest Miocene to Pleistocene. Proc Ocean Drill Program Sci Results, 138, pp.555~597 (1995)
- Chavez FP, "Biological and chemical response of the equatorial Pacific Ocean to the 1997-98 El Niño", Science, 286, pp.2126~2131 (1999)
- Coloma C, "Planktonic foraminifera during El Niño 1997-98 off Coquimbo (30oS; 73oW)", Chile. Gayana, 69(1), pp.48~77 (2005)
- Dymond J, "Biogenic particle fluxes in the equatorial pacific: evidence for both high and low productivity during the 1982-1983 El Niño", Global Biogeochem Cy, 2(2), pp.129~137 (1988)
- Fiedler PC, "Hydrography of the eastern tropical Pacific: a review", Prog Oceanogr, 69, pp.143~180 (2006)
- Forsbergh ED, "On the climatology, oceanography and fisheries of the Panama Bight", Inter-American Trop Tuna Commission Bull, 14(2), pp.49~365 (1969)
- Gajardo N, "Characterization of El Niño, La Niña, and normal conditions through planktonic foraminifera (2006-2007) in the southeastern Pacific", Cienc Mar, 39(3), pp.253~264 (2013)
- Guptha MVS, "Seasonal variation in the flux of planktic foraminifera:sediment trap results from the bay of Bengal, northern Indian ocean", J Foramin Res, 27(1), pp.5~19 (1997)
- Hemleben C, "Recent advances in research on living planktonic foraminifera", Recons Marine Paleoenviron, 30, pp.141~170 (1983)
- Hemleben G, "Modern Planktonic Foraminifera", pp.63~ (1989), Springer
- Honjo S, "Export production of particles to the interior of the equatorial Pacific Ocean during the 1992 EqPac experiment", Deep-Sea Res Pt II, 42(2-3), pp.831~870 (1995)
- Imbrie J, "Late Cenozoic Glacial Ages", pp.71~182 (1971), Yale Univ Press
- Kang JH, "Latitudinal distribution of mesozooplankton in the off-equatorial northeastern Pacific before and after the 1998", 99 La Niña event, 2008, pp.65, 218~234
- Kawahata H, "Seasonal change in foraminiferal production in the western equatorial Pacific warm pool: evidence from sediment trap experiments", Deep-Sea Res Pt II, 49, pp.2783~2800 (2002)
- Kessler WS, "The 1992-1993 El Niño in the central Pacific", Deep-Sea Res Pt II, 42, pp.295~333 (1995)
- 김형직, "북동태평양 심해에서 관측된 퇴적물 입자 플럭스의 계절적 변동", 바다, 13(3), pp.200~209 (2008), 한국해양학회
- Hyung Jeek Kim, "Seasonal variations of particle fluxes in the northeastern equatorial Pacific during normal and weak El Niño periods", Geosciences Journal, 14(4), pp.415~422 (2010), 한국지질과학협의회
- Kim HJ, "Influence of ENSO variability on sinking-particle fluxes in the northeastern equatorial Pacific", Deep-Sea Res Pt I, 58, pp.865~874 (2011)
- Kuroyanagi A, "Seasonal to interannual changes in planktonic foraminiferal assemblages in the northwestern North Pacific: Sediment trap results encompassing a warm period related to El Niño", Palaeogeogr Palaeocl, 262, pp.107~127 (2008)
- Latala A, "Effects of salinity, temperature and light on the growth and morphology of green planktonic algae", Oceanologia, 31, pp.119~138 (1991)
- Lionard M, "Influence of changes in salinity and light intensity on growth of phytoplankton communities from the Schelde river and estuary (Belgium", The Netherlands), 2005, pp.540, 105~115
- Martinez JI, "Planktonic foraminifera from the eastern Indian Ocean:distribution and ecology in relation to the Western Pacific Warm Pool (WPWP)", Mar Micropaleontol, 34, pp.121~151 (1998)
- McPhaden M, "The Tropical Ocean-Global Atmosphere observing system: A decade of progress", J Geophys Res, 130(C7), pp.169~240 (1998)
- Murray JW, "Physical and biological controls on carbon cycling in the Equatorial Pacific", Science, 266, pp.5865~ (1994)
- Pennington JT, "Primary production in the eastern tropical Pacific: A review", Prog Oceanogr, 69, pp.285~317 (2006)
- Ryther JH, "Photosynthesis in the ocean as a function of light intensity", Limnol Oceanogr, 1(1), pp.61~70 (1956)
- Saito T, "Systematic index of recent and Pleisocene planktonic foraminifera", pp.190~ (1981), University of Tokyo Press
- Spindler M, "Feeding behavior of some planktonic foraminifers in laboratory cultures", J Foramin Res, 14(4), pp.237~249 (1984)
- Thunell RC, "Seasonal variation in the flux of planktonic foraminifera: time series sediment trap results from the Panama Basin", Earth Planet Sc Lett, 64, pp.44~55 (1983)
- Thunell RC, "Sedimentation of planktonic foraminifera: Seasonal changes in species flux in the Panama Basin", Micropaleontology, 30(3), pp.243~262 (1984)
- Vincent E, "Planktonic foraminifera and their use in paleoceanography. The Oceanic Lithospher:The Sea, Vol. 7", pp.1025~1119 (1981), John Wiley and Sons
- Wanninkhof R, "Seasonal and lateral variations in carbon chemistry of surface water in the eastern equatorial Pacific during 1992", Deep-Sea Res Pt II, 42(2-3), pp.387~409 (1995)
- Watkins JM, "Living planktonic foraminifera: tracers of circulation and productivity regimes in the central equatorial Pacific", Deep-Sea Res Pt II, 43(4-6), pp.1257~1282 (1996)
- Watkins JM, "Living planktonic foraminifera in the central tropical Pacific Ocean: articulating the equatorial ‘cold tongue’ during La Niña, 1992", Mar Micropaleontol, 33, pp.157~174 (1998)