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Latitudinal Differences in the Distribution of Mesozooplankton in the Northeastern Equatorial Pacific
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  • Journal title : Ocean and Polar Research
  • Volume 26, Issue 2,  2004, pp.351-360
  • Publisher : Korea Institute of Ocean Science & Technology
  • DOI : 10.4217/OPR.2004.26.2.351
 Title & Authors
Latitudinal Differences in the Distribution of Mesozooplankton in the Northeastern Equatorial Pacific
Kang, Jung-Hoon; Kim, Woong-Seo; Son, Seung-Kyu;
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To investigate latitudinal variations in the zooplankton community along the meridian line (, ), we measured temperature, salinity, nitrate, chlorophyll-a and zooplankton at depths above 200 m from July to , 2003. For comparative analysis, data of the physico-chemical properties and chl-a were matched to the two sampling depths (surface mixed layer and thermocline depth-200 m) of zooplankton. Latitudinal differences in the mesozooplankton distribution were mainly influenced by divergence formed at a boundary line formed by currents of opposing directions, consisting of North Equatorial Current (NEC) and North Equatorial Counter Current (NECC). High concentrations of chl-a south of , caused by equatorial upwelling related nutrients, is thought to be affected by the role of this divergence barrier, supported by relatively low concentrations in waters north of . The latitudinal differences of the chl-a were significantly associated with the major groups of zooplankton, namely calanoid and cyclopoid copepods, appendicularians, ostracods, chaetognaths, invertebrate larvae, and others. And temperature significantly affected the latitudinal variation of radiolarians, siphonophores, salps and immature copepods. The latitudinal differences in the two factors, temperature and chl-a, which explained 71.0% of the total zooplankton variation, were characterized by the equatorial upwelling as well as the divergence at . The physical characteristics also affected the community structure and abundance of zooplankton as well as average ratios of cyclopoid versus calanoid copepods. The abundance of dominant copepods, which were consistent with chl-a, were often associated with the carnivorous zooplankton chaetognaths, implying the relative importance of bottom-up regulation from physical properties to predatory zooplankton during the study period. These results suggested that latitudinal distribution of zooplankton is primarily controlled by current-related divergences, while biological processes are of secondary importance in the northeastern Equatorial Pacific during the study period in question.
Calanoid and cyclopoid copepods;divergence;bottom-up regulation;
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Latitudinal distribution of mesozooplankton in the off-equatorial northeastern Pacific before and after the 1998/99 La Niña event, Marine Environmental Research, 2008, 65, 3, 218  crossref(new windwow)
Spatial variability of phytoplankton in the Pacific western boundary currents during summer 2014, Marine and Freshwater Research, 2017, 68, 10, 1887  crossref(new windwow)
Barber, R.T., M.P. Sanderson, S.T. Lindley, F. Chai, J. Newton, C.C. Trees, D.G. Foley, and F.P. Chavez. 1996. Primary production and its regulation in the equatorial Pacific during and following the 1991-92 El Nino. Deep-Sea Res. II, 43, 970-993.

Betzer, P.R., W.J. Showers, E.A. Laws, C.D. Winn, G.R. DiTullio, and P.M. Kroopnick. 1984. Primary productivity and particle fluxes on a transect of the equator at $153^{\circ}W$ in the Pacific Ocean. Deep-Sea Res., 31, 1-11. crossref(new window)

Bidigare, R.R. and M.E. Ondrusek. 1996. Spatial and temporal variability of phytoplankton pigment distributions in the central equatorial Pacific Ocean. Deep-Sea Res. II., 43, 809-833. crossref(new window)

Blackburn, M., R.M. Laurs, R.W. Owen, and B. Zeitzschel. 1970. Seasonal and areal changes in standing stocks of phytoplankton, zooplankton and micronekton in the eastern tropical Pacific. Mar. Biol., 7, 14-31. crossref(new window)

Chavez, F.P. and R.T. Barber. 1987. An estimate of new production in the equatorial Pacific. Deep-Sea Res., 34, 1229-1243. crossref(new window)

Chavez, F.P., K.R. Buck, S.K. Service, J. Newton, and R.T. Barber. 1996. Phytoplankton variability in the central and eastern tropical Pacific. Deep-Sea Res. II, 43, 835-870. crossref(new window)

Dessier, A. and J.R. Donguy. 1985. Planktonic copepods and environmental properties of the eastern equatorial Pacific: seasonal and spatial variations. Deep-Sea Res., 32, 1117-1133. crossref(new window)

Gaudy, R., G. Champalbert, and R. Le Borgne. 2003. Feeding and metabolism of mesozooplankton in the equatorial Pacific high-nutrient, low-chlorophyll zone along $180^{\circ}$. J. Geophys. Res., 108(C12), 8144. crossref(new window)

Harris, R.P., M.R. Reeve, G.D. Grice, G.T. Evans, V.R. Gibson, J.R. Beers, and B.K. Sullivan. 1982. Trophic interactions and production process in natural zooplankton communities in enclosed water columns. p. 353-387. In: Marine Mesocosms. ed. by G.D. Grice and M.R. Reeve. Springer-Verlag, New York.

Lampitt, R.S. and J.C. Gamble. 1982. Diet and respiration of the small planktonic marine copepod, Oithonanana. Mar. Biol., 66, 185-190. crossref(new window)

Le Borgne, R., G. Champalbert, and R. Gaudy. 2003. Mesozooplankton biomass and composition in the equatorial Pacific along $180^{\circ}$ J. Geophys. Res., 108(C12), 8143. crossref(new window)

Mann, K.H. and J.R.N. Lazier. 1991. Dynamics of marine ecosystems: Biological-physical interactions in the oceans. Blackwell Scientific Publications, Cambridge. 466 p.

McGowan, J.A. and P.W. Walker. 1979. Structure in the copepod community of the North Pacific Central Gyre. Ecol. Monogr., 49, 195-226. crossref(new window)

MOMAF. 1996. A report on '96 Deep Sea Bed Mineral Resources Exploration. MOMAF, Seoul.

MOMAF. 1998. A report on '98 Deep Sea Bed Mineral Resources Exploration. MOMAF, Seoul.

MOMAF. 1999. A report on '99 Deep Sea Bed Mineral Resources Exploration. MOMAF, Seoul.

MOMAF. 2003. A report on 2003 Deep Sea Bed Mineral Resources Exploration. MOMAF, Seoul.

Owen, R.W. and B. Zeitzschel. 1970. Phytoplankton production: seasonal change in the oceanic eastern tropical Pacific. Mar. Biol., 7(1), 32-36. crossref(new window)

Parsons, T.R., Y. Maita, and C.M. Lalli. 1984. A manual of chemical and biological methods for seawater analysis. Pergamon Press, New York. 173 p.

Peterson, W.T. and J.E. Keister. 2002. The effect of a large cape on distribution patterns of coastal and oceanic copepods off Oregon and northern California during the 1998-1999 El Nino-La Nina. Prog. Oceanogr., 53, 389-411. crossref(new window)

Peterson, W.T., J.E. Keister, and L.R. Feinberg. 2002. The effects of the 1997-99 El Nino/La Nina events on hydrography and zooplankton off the central Oregon coast. Prog. Oceanogr., 54, 381-398. crossref(new window)

Pickard, G.L. and W.J. Emery. 1982. Descriptive physical oceanography, 4th ed. Pergamon Press. 249 p.

Roman, M.R., H.G. Dam, A.L. Gauzens, J. Urban-Rich, D.G. Foley, and T.D. Dickey. 1995. Zooplankton variability on the equator at $140^{\circ}W$ during the JGOFS EqPac study. Deep-Sea Res. II, 42, 673-693. crossref(new window)

Roman, M.R., A.L. Gauzens, and T.J. Cowles. 1985. Temporal and spatial changes in epipelagic microzooplankton and mesozooplankton biomass in warm-core Gulf Stream ring 82-B. Deep-Sea Res., 32, 1007-1022. crossref(new window)

Roman, M.R., H.G. Dam, R. Le Borgne, and X. Zhang. 2002. Latitudinal comparisons of equatorial Pacific zooplankton. Deep-Sea Res. II, 49, 2695-2711. crossref(new window)

Smith, S.L., C.M. Boyd, and P.V.Z. Lane. 1980. Short-term variations in the vertical distribution of small copepods off the coast of northern Peru. p. 417-426. In: Coastal upwelling. ed. by F.A. Richards. American Geophysical Union.

Son, S.K., J.H. Hyun, C.K. Park, S.B. Ghi, and K.H. Kim. 2001. Characteristics of chemical environment by changing temperature at the surface layer in the northeast Equatorial Pacific. J. Kor. Soc. Mar. Environ. Eng., 4, 24-37.

Vinogradov, M.E. 1981. Ecosystems of equatorial upwellings. p. 69-90. In: Analysis of Marine Ecosystems. ed. by A.R. Longhurst. Academic Press, New York.

Welling, L.A., N.G. Pisias, E.S. Johnson, and J.R. White. 1996. Distribution of polycystine radiolarian and their relation to the physical environment during the 1992 El Nino and following cold event. Deep-Sea Res. II, 43, 1413-1434. crossref(new window)

White, J.R., X. Zhang, L.A. Welling, M.R. Roman, and H.G. Dam. 1995. Latitudinal gradients in zooplankton biomass in the tropical Pacific at $140^{\circ}W$ during the JGOFS EqPac study: Effects of El Nino. Deep-Sea Res. II, 42, 715-733. crossref(new window)

Whitney, F.A., C.S. Wong, and P.W. Boyd. 1998. Interannual variability in nitrate supply to surface waters of the Northeast Pacific Ocean. Mar. Ecol. Prog. Ser., 170, 15-23. crossref(new window)

Zhang, X., H.G. Dam, J.R. White, and M.R. Roman. 1995. Latitudinal variations in mesozooplankton grazing and metabolism in the central tropical Pacific during the U.S. JGOFS EqPac study. Deep-Sea Res. II, 42, 695-714. crossref(new window)