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Vertical distribution of faecal pellets during FLEX '76
Helgoländer Meeresuntersuchungen volume 34, pages 313–327 (1981)
Abstract
During FLEX '76 (Fladen Ground Experiment), the vertical distribution of faecal pellets was studied at a time station on the Fladen Ground (North Sea). Generally, the faecal pellets showed a clearly-defined maximum above the main thermocline within a depth of 0–30 m. Only in a period of storms was the faeces-maximum lowered to the main thermocline, which occurred at 50–60 m depth. The maximum numbers of the copepodCalanus finmarchicus, the most important producer of faecal pellets, initially occupied the same level as the faeces maximum. However, from the middle of May, theC. finmarchicus population started a diel vertical migration, during which, as a rule, the copepods migrated away from the surface region into deeper waters. On this occasion, the faecal pellet maximum did not break up but remained in the uppermost layer of the water column. The high concentrations of faecal pellets found within the uppermost 30 m of the water column contradict the extremely high sinking rates of faeces reported by various authors. The quotients of the depth-integrated counts of faecal pellets andC. finmarchicus individuals were calculated. The main maximum of faeces per individual occurred in the period between 28 April and 6 May 1976. A second, smaller maximum was documented between 23–28 May 1976. These two maxima coincided with the development of phytoplankton blooms observed at this particular time station.
Literature cited
Beasley, T. M., Heyraud, M., Higgo, J. J. W., Cherry, R. D. & Fowler, S. W., 1978. Po-210 and Pb-210 in zooplankton fecal pellets. — Mar.Biol.44 325–328.
Butler, E. I., Corner, E. D. S. & Marshall, S. M., 1970. On the nutrition and metabolism of zooplankton VII. Seasonal survey of nitrogen and phosphorus excretion byCalanus in Clyde Sea-area. — J. mar. biol. Ass. U. K.50 525–560.
Corner, E. D. S., Head, R. M. & Kilvingten, C. C., 1972. On the nutrition and metabolism of zooplankton VIII. The grazing ofBidulphia cells byCalanus helgolandicus. — J. mar. biol. Ass. U. K.52 847–861.
Ferrante, J. G. & Parker, J. I., 1977. Transport of diatom frustules by copepod fecal pellets to the sediments of Lake Michigan. — Limnol. Oceanogr.22 92–98.
Fowler, S. W. & Small, L. F., 1972. Sinking rates of euphausid fecal pellets. — Limnol. Oceanogr.17 273–296.
Frost, B. W., 1972. Effects of size and concentration of food particles on the feeding behavior of the marine planktonic copepodCalanus pacificus. — Limnol. Oceanogr.17 805–815.
Gamble, J. C., 1978. Copepod grazing during a declining spring phytoplankton bloom in the northern North Sea. — Mar.Biol.49 303–315.
Gaudy, R., 1974. Feeding four species of pelagic copepods under experimental conditions. — Mar.Biol.25 125–141.
Gauld, D. T., 1966. The swimming and feeding of planktonic copepods. In: Some contemporary studies in marine science. Ed. by H. Barnes, Allen, London, 313–334.
Haq, S. M., 1967. Nutritional physiology ofMetridia lucens andM. longa from the Gulf of Maine. — Limnol. Oceanogr.12 40–51.
Honjo, S. & Roman, M. R., 1978. Marine copepod fecal pellets: production, preservation and sedimentation. — J. mar. Res.36 45–57.
Johannes, R. E. & Satomi, M., 1966. Composition and nutritive value of fecal pellets of marine crustacean. — Limnol. Oceanogr.11 191–197.
Krause, M. & Radach, G., 1980. On the succession of developmental stages of herbivorous zooplankton in the northern North Sea during FLEX '76. 1. First statements about the main groups of the zooplankton community. — Meteor Forsch. Ergebn. (A)22 133–149.
Marshall, S. M. & Orr, M. A., 1955. The biology of a marine copepodCalanus finmarchicus (Gunnerus). Oliver & Boyd, London, 188 pp.
Martens, P., 1975. Über die Qualität und Quantität der Sekundär- und Tertiärproduzenten in einem marinen Flachwasserökosystem der westlichen Ostsee. Thesis, Universität Kiel, 111 pp.
Martens, P., 1978. Fecal pellets. — Fich. Ident. Zooplancton162 1–4.
Mullin, M. M., 1963. Some factors affecting the feeding of marine copepods of the genusCalanus. — Limnol. Oceanogr.8 239–250.
Petipa, T. S., Pavlova, E. V. & Mironov, G. N., 1970. The food web structure, utilization and transport of energy by trophic levels in the planktonic communities. In: Marine food chains. Ed. by J. H. Stelle, Univ. of California Press, Berkely, 142–167.
Radach, G., 1980. Preliminary simulations of the phytoplankton and phosphate dynamics during FLEX '76 with a simple two-component model. — Meteor Forsch. Ergebn. (A)22 151–163.
Radach, G., Trahms, J. & Weber, A., 1980. The chlorophyll development at the Central Station during FLEX '76 — two data sets. — Proceedings of the final ICES/Jonsis workshop on JONSDAP '76 (Liège, Belgium, 29 April–2 May 1980). — C.M.-ICES/C3, 3–21.
Schrader, H.-J., 1971. Fecal pellets: Role on sedimentation of pelagic diatoms. — Science, N. Y.174 55–57.
Smayda, T. J., 1969. Some measurements of the sinking rate of fecal pellets. — Limnol. Oceanogr.14 621–625.
Smayda, T. J., 1971. Normal and accelerated sinking of phytoplankton in the sea. — Mar. Geol.11 105–122.
Soetje, K. C. & Huber, K., 1980. A compilation of data on the thermal stratification of the Central Station in the northern North Sea during FLEX '76. — Meteor Forsch.Ergebn. (A)22 69–77.
Turner, J. T., 1977. Sinking rates of fecal pellets from the marine copepodPontella meadii. — Mar. Biol.40 259–259.
Wiebe, P. H., Boyd, S. H. & Winget, C., 1976. Particulate matter sinking to the deep-sea floor at 2000 m in the Tongue of the Ocean Bahamas, with a description of a new sedimentation trap. — J. mar. Res.34, 341–354.
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JONSDAP '76 Contribution No. 68.
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Krause, M. Vertical distribution of faecal pellets during FLEX '76. Helgoländer Meeresunters 34, 313–327 (1981). https://doi.org/10.1007/BF02074125
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DOI: https://doi.org/10.1007/BF02074125