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Longitudinal Distribution of Zooplankton at 10.5°N in the Northeastern Pacific
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  • Journal title : Ocean and Polar Research
  • Volume 29, Issue 4,  2007, pp.283-295
  • Publisher : Korea Institute of Ocean Science & Technology
  • DOI : 10.4217/OPR.2007.29.4.283
 Title & Authors
Longitudinal Distribution of Zooplankton at 10.5°N in the Northeastern Pacific
Kang, Jung-Hoon; Cho, Kyu-Hee; Son, Ju-Won; Kim, Woong-Seo;
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We investigated the longitudinal variations in zooplankton abundances and their related physicochemical properties at nine stations located between and at in the northeastern Pacific in summer 2004. Temperature, salinity, inorganic nutrients, chlorophyll-a (hereafter chl-a) and zooplankton (>) were sampled within the depth from the surface to 200 m depth at longitude intervals. Zooplankton(>) samples were vertically collected at two depth intervals from surface to 200 m, consisting of surface mixed and lower layers (thermocline200 m). Longitudinal distributional pattern of hydrological parameters (especially salinity) was physically influenced by the intensity of westward geostrophic current passage relating to the NEC (North Equatorial Current). Data from the longitudinal survey showed clear zonal distributions in the hydrological parameters(temperature, salinity and nutrients). However, spatial patterns of the chl-a concentrations and zooplankton abundances were mostly independent of the zonal distributions of hydrological parameters. The two peaks of zooplankton abundance in the surface mixed layer were characterized by different controlling factors such as bottom-up control from nutrients to zooplankton () and accumulation by increment of friction force and taxonomic interrelationship ( and ). Divergence-related upwelling caused introduction of nutrients into surface waters leading to the increment of chl-a concentration and zooplankton abundances (). Increased friction force in relation to reduced flow rates of geostrophic currents caused accumulation of zooplankton drifting from eastern stations of study area( and ). Besides, high correlation between immature copepods and carnivorous groups such as chaetognaths and cyclopoids also possibly contributed to the enhanced total abundance of zooplankton in the surface mixed layer (p<0.05). Zooplankton community was divided into three groups (A, B, C) which consecutively included the eastern peak of zooplankton(), the western peak( and ) and high nutrient but low chl-a concentration and zooplankton abundance (). Moreover, Group B corresponded to the westward movement of low saline waters(<33.6 psu) from 128 to . In summary, longitudinal distributions of zooplankton community was characterized by three different controlling factors: bottom-up control (), accumulation by increased friction force and relationships among zooplankton groups ( and ), and mismatch between hydrological parameters and zooplankton in the high nutrient low chlorophyll area () during the study period.
longitudinal distribution;zooplankton;chlorophyll-a;nutrient;the northeastern Pacific;
 Cited by
노재훈, 유신재, 이미진, 손승규, 김웅서. 2004. Flow cytometer를 이용한 열대 동태평양의 독립영양 극미소 플랑크톤 연구. Ocean and Polar Res., 26, 273-286 crossref(new window)

Barber, R.T. and J.H. Ryther. 1969. Organic chelators: Factors affecting primary production in the Cromwell Current upwelling. J. Exp. Mar. Biol. Ecol., 3, 191-199 crossref(new window)

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 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)

Boltovskoy, D. 1999. Radiolarian Polycystina. p. 149-212. In: South atlantic zooplankton. ed. by D. Boltovskoy. Backhuys Publishers, Leiden, The Netherlands

Chavez, F.P. 1989. Size distribution of phytoplankton in the central and eastern tropical Pacific. Global Biogeochem. Cy., 3, 27-35 crossref(new window)

Flood, P.R., D. Deibel, and C.C. Morris. 1992. Filtration of colloidal melanin from sea water by planktonic tunicates. Nature, 355, 630-632 crossref(new window)

Gueredrat, J.A. 1971. Evolution d'une popilation de copepodes dans le systeme des courants equatoriaux de l'ocean Pacifique, zoogeographie, ecologie et diversite specidique. Mar. Biol., 9, 300-314 crossref(new window)

Hunt, B.P.V., E.A. Pakhomov, and C.D. McQuaid. 2001. Short-term variation and long-term changes in the oceanographic environment and zooplankton community in the vicinity of a sub-Antarctic archipelago. Mar. Biol., 138, 369-381 crossref(new window)

Kang, J.H. 2004. The ecology of mesozooplankton in the Yellow Sea, the East Sea, and the northeastern Equatorial Pacific. Ph.D. Thesis, Seoul National University. 160 p

Kang, J.H., W.-S. Kim, and S.K. Son. 2004a. Latitudinal differences in the distribution of mesozooplankton in the Northeastern Equatorial Pacific. Ocean and Polar Res., 26, 351-360 crossref(new window)

Kang, J.H., W.-S. Kim, K.I. Chang, and J.H. Noh. 2004b. Distribution of plankton related to the mesoscale physical structure within the surface mixed layer in the southwestern East Sea. J. Plankton Res., 26, 1515-1528 crossref(new window)

Kling, S.A. and D. Boltovskoy. 1999. Radiolarian Phaeodaria. p. 213-264. In: South atlantic zooplankton. ed. by D. Boltovskoy. Backhuys Publishers, Leiden, The Netherlands

Laybourn-Parry, J. 1992. Protozoan plankton ecology. Chapman & Hall, London, 231 p

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, doi:10.1029/2000JC000745 crossref(new window)

Le Borgne, R. and M. Rodier. 1997. Net zooplankton and the biological pump: A comparison between the oligotrophic and mesotrophic equatorial Pacific. Deep- Sea Res. II, 44, 2003-2023 crossref(new window)

Le Borgne, R., M. Rodier, A. Le Bouteiller, and J.W. Murray. 1999. Zonal variability of plankton and particle export flux in the Equatorial Pacific upwelling between $165^{circ}E$ and $1150^{circ}W$. Oceanol. Acta, 22, 57-66 crossref(new window)

Mazzocchi, M.G. and G.-A. Paffenhofer. 1999. Swimming and feeding behaviour of the planktonic copepod Clausocalanus furcatus. J. Plankton Res., 21, 1501-1518 crossref(new window)

Minas, H.J., M. Minas, and T.T. Packard. 1986. Productivity in upwelling areas deduced from hydrographic and chemical fields. Limnol. Oceanogr., 31, 1182-1206 crossref(new window)

Ministry of Maritime Affairs and Fisheries. 1998. A report on '98 Deep Sea Bed Mineral Resources Exploration. MOMAF. 1209 p

Ministry of Maritime Affairs and Fisheries. 1999. A report on '99 Deep Sea Bed Mineral Resources Exploration. MOMAF. CRPM 99019-00-1201-7. 780 p

Ministry of Maritime Affairs and Fisheries. 2004. A report on '03 Deep Sea Bed Mineral Resources Exploration. MOMAF. CRPM 197-00-1582-5. 770 p

Ministry of Maritime Affairs and Fisheries. 2005. A report on '04 Deep Sea Bed Mineral Resources Exploration. MOMAF. CRPM 26800-1685-5. 645 p

Paffenhofer, G.-A., B.K. Sherman, and T.N. Lee. 1987. Summer upwelling on the southeastern continental shelf of the U.S.A. during 1981: Abundance, distribution and patch formation of zooplankton. Prog. Oceanogr., 19, 403-436 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

Partensky, F., J. Blanchot, and D. Vaulot. 1999. Differential distribution of Prochlorococcus and Synechococcus in oceanic waters; A review. p. 457-475. In: Marine cyanobacteria. ed. by L. Charpy and A.W.D. Larkum. Bull. L'Institut. Oceanogr, Monaco

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

Raymont, J.E.G. 1983. Plankton and productivity in the oceans. Pergamon Press, Oxford. 824 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., 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)

Shih, C.-T. 1986. Longitudinal distribution of oceanic calanoids (Crustacea: copepoda): An example of marine biogeography. Syllogeus, 58, 105-114

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

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)

Yamashita, H., K. Takahashi, and N. Fujitani. 2002. Zonal and vertical distribution of radiolarians in the western and central Equatorial Pacific in January 1999. Deep-Sea Res. II, 49, 2823-2862 crossref(new window)

Yang, E.J., J.K. Choi, and J.H. Hyun. 2004. Distribution and structure of heterotrophic protist communities in the northeast equatorial Pacific Ocean. Mar. Biol., 146, 1-15 crossref(new window)