Excretion of dissolved organic matter by phytoplanktonic populations of the eastern and southeastern Brazilian coast

bioce Boletim do Instituto Oceanográfico Bol. Inst. Oceanogr. 0373-5524 Instituto Oceanográfico da Universidade de São Paulo São Paulo, SP, Brazil Measurements of primary productivity and excretion of DOM in natural phytoplankton populations were carried out in surface waters from Lat. 17º14'S -Long. 039º13'W to Lat. 28º36'S -Long. 048º49'W. The relative rates of excretion varied between two and thirty percent from the total assimilated in the transparent bottle. In relative terms the excretion increased towards the pelagic zones, but in absolute results it followed the production values. Based on the predominat water masses and on the excretion values a classification of the stations under study is suggested. ARTIGOS Excreção de materia orgânica dissolvida por populações fitoplanctônicas da costa leste e sudeste do Brasil* Excretion of dissolved organic matter by phytoplanktonic populations of the eastern and southeastern Brazilian coast Armando A. Henriques VieiraI; Clóvis TeixeiraII IDepartamento de Ciencias Biológicas da Universidade Federal de São Carlos IIInstituto Oceanógrafico da Universidade de São Paulo RESUMO Foram feitas medidas de produtividade e excreção de MOD em populações naturais da superfície de águas costeiras e oceânicas, entre Barreira Vermelha (BA) e Cabo de Santa Marta Grande (SC). Os valores relativos de excreção variaram entre 2 e 30% do total assimilado no frasco transparente. Os valores relativos de excreção aumentam em direção as zonas pelágicas, porem, em números absolutos, a excreção acompanha a produtividade. Os altos valores relativos encontrados em zonas oceânicas seriam relativamente baixos, e ate nulos em algumas estações, se a excreção no frasco preto fosse des contada do frasco transparente. Baseando-se na produtividade das estações, estas foram classificadas em tipos, sendo, então, determinado o valor médio de excreção de cada tipo. As estações oceânicas classificadas nos tipos I e II apresentaram um valor médio de excreção relativa de 20,2 e 17,8%, respectivamente. As estações costeiras situadas em areas densamente eutrofiçadas, tipos VI e VII, apresentaram um valor médio de excreção relativa de 4,6 e 3,1%, respectivamente. Os tipos III, IV e V, representando estações intermediarias, tem valores de 11,3, 7,3 e 8%, respectivamente. SYNOPSIS Measurements of primary productivity and excretion of DOM in natural phytoplankton populations were carried out in surface waters from Lat. 17º14'S -Long. 039º13'W to Lat. 28º36'S -Long. 048º49'W. The relative rates of excretion varied between two and thirty percent from the total assimilated in the transparent bottle. In relative terms the excretion increased towards the pelagic zones, but in absolute results it followed the production values. Based on the predominat water masses and on the excretion values a classification of the stations under study is suggested. Texto completo disponível apenas em PDF. Full text available only in PDF format. Referências bibliográficas AIDAR-ARAGÃO, E.; TEIXEIRAL C. & VIEIRA, A. A, H. 1980. Produção primaria e concentração de clorofila-a na costa brasileira (Lat. 22º31'S - Long. 41º52'W a Lat. 28º43'S - Long. 47º57'W). Bolm Inst, oceanogr., S Paulo, 29(2): (No prelo). AL-HASAN, R. H. & COUGHLAN, S. J. 1976. A method for the determination of glycollic acid in the extracellular products of cultured and natural phytoplankton populations. J. exp. mar. Biol. Ecol., 25:141-149. ______; PANT, A. & FOGG, G. E. 1975. Seasonal variations in phytoplankton and glycollate concentrations in the Menai Straits, Anglesey. J. mar. biol. Ass. U.K., 55:557-566. ANDERSON. G. C. & ZEUTSCHEL, R. P. 1970. Release of dissolved organic matter by marine phytoplankton in coastal and off shore areas of the Northeast Pacific Ocean. Limnol. Oceanogr., 15: 402-407. ANDREWS, P. & WILLIAMS, P. J. de B. 1971. 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A, H No prelo AL-HASAN, R. H. & COUGHLAN, S. J. 1976. A method for the determination of glycollic acid in the extracellular products of cultured and natural phytoplankton populations. J. exp. mar. Biol. Ecol., 25:141-149. A method for the determination of glycollic acid in the extracellular products of cultured and natural phytoplankton populations J. exp. mar. Biol. Ecol 141 149 25 AL-HASAN R. H COUGHLAN S. J ______; PANT, A. & FOGG, G. E. 1975. Seasonal variations in phytoplankton and glycollate concentrations in the Menai Straits, Anglesey. J. mar. biol. Ass. U.K., 55:557-566. Seasonal variations in phytoplankton and glycollate concentrations in the Menai Straits, Anglesey J. mar. biol. Ass. U.K 557 566 55 AL-HASAN R. H PANT A FOGG G. E ANDERSON. G. C. & ZEUTSCHEL, R. P. 1970. Release of dissolved organic matter by marine phytoplankton in coastal and off shore areas of the Northeast Pacific Ocean. Limnol. Oceanogr., 15: 402-407. Release of dissolved organic matter by marine phytoplankton in coastal and off shore areas of the Northeast Pacific Ocean Limnol. Oceanogr 402 407 15 ANDERSON G. C ZEUTSCHEL R. P ANDREWS, P. & WILLIAMS, P. J. de B. 1971. Heterotrophic utilization of dis solved organic compounds in the sea. III. Measurement of the oxidation rates and concentrations of glucose and amino acids in sea water. J. mar. biol. Ass. U.K., 51:111-125. Heterotrophic utilization of dis solved organic compounds in the sea: III. Measurement of the oxidation rates and concentrations of glucose and amino acids in sea water J. mar. biol. Ass. U.K 111 125 51 ANDREWS P WILLIAMS P. J. de B ANTIA, N. J.; BERLAND, B. R.; BONIN, D. J. & MAESTRINI, S. Y. 1975. Comparative evaluation of certain organic and inorganic sources of nitrogen for phototrophic growth of marine microalgae. J. mar. biol. Ass. U.K., 55:519-539. 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Primary production and release of dissolved organic carbon from phytoplankton in the Western North Atlantic Ocean Deep Sea Res 731 735 19 CHOI I. C COUGHLAN, S. J. 1977. Comparative studies of glycollic acid uptake by four marine algae. Br. phycol. J., 12:55-62. Comparative studies of glycollic acid uptake by four marine algae Br. phycol. J 55 62 12 COUGHLAN S. J CRAWFORD, C. C; HOBBIE, J. E. & WEBB, K. L. 1974. The utilization of dissolved free amino acids by estuarine microorganisms. Ecology, 55: 551-563. The utilization of dissolved free amino acids by estuarine microorganisms Ecology 551 563 55 CRAWFORD C. C HOBBIE J. E WEBB K. L DUURSMA, E. K. 1961. Dissolved organic carbon, nitrogen and phosphorous in the sea. Neth. J. Sea Res., 1:1-148. Dissolved organic carbon, nitrogen and phosphorous in the sea Neth. J. Sea Res 1 148 1 DUURSMA E. K EPPLEY, R. W. & SLOAN, P. R. 1965. Carbon balance experiments with marine phytoplankton. J. Fish. Res. Bd Can., 22:1083-1097. Carbon balance experiments with marine phytoplankton J. Fish. Res. Bd Can 1083 1097 22 EPPLEY R. W SLOAN P. R FOGG, G. E. 1966. The extracellular products of algae. Oceanogr. Mar. Biol., Ann. Rev., 4:195-212. The extracellular products of algae Oceanogr. Mar. Biol., Ann. Rev 195 212 4 FOGG G. E ______ 1975. Biochemical pathways in unicellular plants. In: Copper, J. P. - Photosynthesis and productivity in different environments. Cambridge, University Press, p. 437-457. Photosynthesis and productivity in different environments 437 457 FOGG G. E Copper J. P ______; NALEWAJKO, C & WATT, W. D. 1965. Extracellular products of phytoplankton photosynthesis. FOGG G. E NALEWAJKO C WATT W. D Proc. R. Soc. Lond., Série B., 162:517-534. Proc. R. Soc. Lond 517 534 162 Série B GUILLARD, R. R. L. & WANGERSKY, P.J. 1958. The production of extracellular carbohydrates by some marine flagel lates. Limnol. Oceanogr., 3:449-454. The production of extracellular carbohydrates by some marine flagel lates Limnol. Oceanogr 449 454 3 GUILLARD R. R. L WANGERSKY P.J HELLEBUST, J. A. 1965. Excretion of some organic compounds by marine phytoplankton. Limnol. Oceanogr., 10:192-206. Excretion of some organic compounds by marine phytoplankton Limnol. Oceanogr 192 206 10 HELLEBUST J. A HELLEBUST, J. A. 1967. Excretion of organic compounds by cultured and natural populations of marine phytoplankton. In: Lauff, G. H., ed. - Estuaries. Washington, Am. Ass. Advanc. Sci., p. 361-366. Estuaries 361 366 HELLEBUST J. A Lauff G. H ______ 1974. Extracellular products. In: Stewart, W.D. P., ed. - Algal physiology and biochemistry. Oxford, Blackwell, p. 838-863. Algal physiology and biochemistry 838 863 HELLEBUST J. A Stewart W.D. P HERBLAND, A. & DANDONNEAU, Y. 1975. 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A _____ 1978. Utilization of glutamate and glicose for heterotrophic growth by the marine pennat diatom Nitzschia laevis Mar. Biol., 47:1-7. Utilization of glutamate and glicose for heterotrophic growth by the marine pennat diatom Nitzschia laevis Mar. Biol 1 7 47 LEWIN J MENZEL, D. W. & RYTHER, J. H. 1968. Organic carbon and the oxygen minimum in the South Atlantic Ocean. Deep Sea Res., 5:327-337. Organic carbon and the oxygen minimum in the South Atlantic Ocean Deep Sea Res 327 337 5 MENZEL D. W RYTHER J. H MESQUITA, A. R. de; LEITE, J. B. A. & RIZZO, R. 1979. Contribuição ao estudo das correntes marinhas na plataforma entre Cabo Frio e Cananéia. Bolm Inst, oceanogr., S Paulo, 28(2): 95-100. Contribuição ao estudo das correntes marinhas na plataforma entre Cabo Frio e Cananéia Bolm Inst, oceanogr 95 100 2 28 MESQUITA A. R. de LEITE J. B. A RIZZO R MYKLESTAD, S. 1977. Production of carbohydrates by marine planktonic diatoms. II. Influence of the N/P ratio in the growth medium on the assimilation ratio, growth rate and production of cellular and extracellular carbohydrates by Chaetoceros affins var. Willei (Gran) Hustedt and Skeletonema costatum (Grev.) Cleve. J. exp. mar. Biol. Ecol., 29:161-179. Production of carbohydrates by marine planktonic diatoms: II. Influence of the N/P ratio in the growth medium on the assimilation ratio, growth rate and production of cellular and extracellular carbohydrates by Chaetoceros affins var. Willei (Gran) Hustedt and Skeletonema costatum (Grev.) Cleve J. exp. mar. Biol. Ecol 161 179 29 MYKLESTAD S PARSONS, T. R. & STRICKLAND, J. D. H. 1963. Discussion of spectrophotometry determinations of marineplant pigments, with revised equations for certaining chlorophyls and carotenoids. J. mar. Res., 2:115-163. Discussion of spectrophotometry determinations of marineplant pigments, with revised equations for certaining chlorophyls and carotenoids J. mar. Res 115 163 2 PARSONS T. R STRICKLAND J. D. H PROVASOLI, L. 1963. Organic regulation of phytoplankton fertility. In: Hill, M. N., ed. - The sea. New York, Interscience Publishers, v.2, p.165-219. The sea 165 219 2 PROVASOLI L Hill M. N ______; MCLAUGHLIN, J. J. A. &; DROOP, M. R. 1957. The development of artificial media for marine algae. Arch. Mikrobiol., 25:392-428. The development of artificial media for marine algae Arch. Mikrobiol 392 428 25 PROVASOLI L MCLAUGHLIN J. J. A DROOP M. R RICHARDS, F. A. & THOMPSON, T. G. 1952. The estimation and characterization of plankton populations by pigment analysis. II. A spectrophotometric method for the estimation of plankton pigments. J. mar. Res., 11:156-172. The estimation and characterization of plankton populations by pigment analysis: II. A spectrophotometric method for the estimation of plankton pigments J. mar. Res 156 172 11 RICHARDS F. A THOMPSON T. G SAUNDERS, G. W. 1957. Interrelations of dissolved organic matter and phytoplankton. Bot. Rev., 23:389-409. Interrelations of dissolved organic matter and phytoplankton Bot. Rev 389 409 23 SAUNDERS G. W SELNER, K. G.; ZINGMARK, R. G. & MILLER, T. G. 1976. Interpretations of 14C method of measuring the total annual production of phytoplankton in a South Caroline estuary. Bot. mar., 19:119-125. Interpretations of 14C method of measuring the total annual production of phytoplankton in a South Caroline estuary Bot. mar 119 125 19 SELNER K. G ZINGMARK R. G MILLER T. G SHAH, N. M. & WRIGHT, R. T. 1974. The occurrence of glycollic acid in a coastal sea water. Mar. Biol., 24: 121-124. The occurrence of glycollic acid in a coastal sea water Mar. Biol 121 124 24 SHAH N. M WRIGHT R. T SHARP, J. H. 1977 . Excretion of organic matter by marine phytoplankton: do healthy cells do it? Limnol. Oceanogr., 22:381-399. Excretion of organic matter by marine phytoplankton: do healthy cells do it? Limnol. Oceanogr 381 399 22 SHARP J. H SILVA, P. C. 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