Summary
A steady state, radiotracer technique was used to study the original source of the carbon in zooplankton. The experiments were started in filtered lake water with added inorganic radiocarbon. At the beginning of the experiments, a proportionally insignificant volume of unfiltered water was introduced into the culture, together with some ovigerous zooplankton individuals. Since the radioactivity: carbon ratio in the dissolved inorganic carbon was kept constant, a similar ratio would be expected to develop in the autotrophic phytoplankton. The same ratio would then be expected to develop in the zooplankton, if its sole carbon source was autotrophic phytoplankton.
According to the results of this approach dissolved organic matter seems to be an important food resource for zooplankton, particularly in highly humic lakes. This conclusion was confirmed by the finding that zooplankton from these lakes was able to grow and reproduce in experiments started with filtered lake water and conducted in complete darkness.
The development of algae was followed over the course of one experiment in highly humic water. The same micro-flagellates reproduced equally well in both light and darkness, which indicates the importance of heterotrophic metabolism in their nutrition. Although there are no direct observations about the food of zooplankton in our experiments, it appears likely that heterotrophic flagellates play an important role as a food of zooplankton in humic waters.
The importance of dissolved organic matter in the nutrition of aquatic organisms would seem to be much greater than has generally been recognized. Consequently the prevailing concepts of the structure and functioning of planktonic ecosystem should be thoroughly re-evaluated.
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References
Arvola L (1983) Primary production and phytoplankton in two small, polyhumic forest lakes in southern Finland. Hydrobiologia 101:105–110
Buscemi PA, Puffer JH (1975) Chemico-trophic attributes of detrital aggregates in a New Mexico alkaline reservoir. Verh Int Ver Limnol 19:358–366
Coveney MF (1978) Separation of algae and bacteria in lake water by size fractionation. Verh Int Ver Limnol 20:1264–1269
Davis PG, Sieburth J McN (1984) Estuarine and oceanic microfla-gellatepredation of actively growing bacteria: estimation by frequency of dividing-divided bacteria. Mar Ecol Prog Ser 19:237–246
Fenchel T (1982a) Ecology of heterotrophic microflagellates. I. Some important forms and their functional morphology. Mar Ecol Progr Ser 8:211–223
Fenchel T (1982 b) Ecology of heterotrophic microflagellates. IV. Quantitative occurrence and importance as bacterial consumers. Mar Ecol Progr Ser 9:35–42
Geller W, Muller H (1981) The filtration apparatus of cladocera: Filter mesh-sizes and their implications on food selectivity. Oecologia 49:316–321
Horvath RS (1972) Microbial co-metabolism and the degradation of organic compounds in nature. Bacteriol Rev 36:146–155
Ilmavirta V (1983) The ecosystem of the oligotrophic lake Pääjärvi. 1. Lake basin and primary production. Verh Int Ver Limnol 21:442–447
Ilmavirta V, Ilmavirta K, Kotimaa A-L (1974) Phytoplanktonic primary production during the summer stagnation in the eutrophicated lakes Lovojärvi and Ormajärvi, southern Finland. Ann Bot Fennici 11:121–132
Johnson BD, Cooke RC (1980) Organic particle and aggregate formation resulting from the dissolution of bubbles in seawater. Limnol Oceanogr 25:653–661
Jørgensen CB (1976) August Pütter, August Krogh, and modern ideas on the use of dissolved organic matter in aquatic environments. Biol Rev 51:291–328
Krogh A (1931) Dissolved substances as food of aquatic organisms. Biol Rev 6:412–442
Kusnetsov SI, Romanenko VI (1966) Produktion der Biomasse heterotropher Bakterien und die Geschwindigkeit ihrer Vermehrung im Rybinsk Stausee. Verh Int Ver Limnol 16:1493–1500
McColl RHS (1972) Chemistry and trophic status of seven New Zealand lakes. N Z J Mar Freshwater Res 6:399–447
Murray RE, Hodson RE (1984) Microbial biomass and utilization of dissolved organic matter in the Okefenokee swamp ecosystem. Appl Environ Microbiol 47:685–692
Neihof RA, Loeb GI (1972) The surface charge of particulate matter in seawater. Limnol Oceanogr 17:7–16
Preston RL, Stevens BR (1982) Kinetic and thermodynamic aspects of sodium-coupled amino acid transport by marine invertebrates. Am Zool 22:709–721
Pütter A (1909) Die Ernährung der Wassertiere und der Stoffhaushalt der Gewässer. Fischer, Jena
Rau G (1978) carbon-13 depletion in a subalpine lake: Carbon flow implications. Science 201:901–902
Rau GH, Mearns AJ, Young DR, Olson RJ, Schafer HA, Kaplan IR (1983) Animal 13C/12C correlates with trophic level in pelagic food webs. Ecology 64:1314–1318
Rodhe W (1955) Can plankton production proceed during winter darkness in subarctic lakes? Verh Int Ver Limnol 12:117–122
Romanenko VI (1964) Heterotrophic assimilation of CO2 by bacterial flora of water. Mikrobiologiya 33:679–683
Salonen K (1979) A versatile method for the rapid and accurate determination of carbon by high temperature combustion. Limnol Oceanogr 24:177–183
Salonen K (1981) Rapid and precice determination of total inorganic carbon and some gases in aqueous solutions. Water Res 15:403–406
Salonen K, Arvola L, Kononen K (1983) Respiration of plankton in two small polyhumic lakes. Hydrobiologia 101:65–70
Salonen K, Jones R, Arvola L (1984) Hypolimnetic phosphorus retrieval by diel vertical migrations of lake phytoplankton. Freshwater Biol 14:431–438
Sarvala J, Ilmavirta V, Paasivirta L, Salonen K (1981) The ecosystem of the oligotrophic lake Pääjärvi 3. Secondary production and an ecological energy budget of the lake. Verh Int Ver Limnol 21:454–459
Schell DM (1983) Carbon-13 and carbon-14 abundances in Alaskan aquatic organisms: Delayed production from peat in arctic food webs. Science 219:1068–1071
Sepers ABJ (1977) The utilization of dissolved organic compounds in aquatic environments. Hydrobiologia 52:39–54
Sheldon RW (1972) Size separation of marine seston by membrane and glassfiber filters. Limnol Oceanogr 17:494–498
Sorokin YI (1972) Biological productivity of the Rvbinsk reservoir: In: Kajak Z and Hillbricht-Ilkowska A (eds) Productivity problems of freshwaters Krakow, pp 493–503
Southward AJ, Southward EC (1982) The role of dissolved organic matter in the nutrition of deep-sea benthos. Am Zool 22:647–659
Stephens GC, Schinske RA (1957) Uptake of amino acids from sea water by ciliary-mucoid filter feeding animals. Biol Bull Mar Biol Lab Woods Hole 113:356–357
Stephens GC (1982) Recent progress in the study of “Die Ernährung der Wassertiere und der Stoffhaushalt der Gewässer”. Am Zool 22:611–619
Wright RT and Coffin RB (1984) Measuring microzooplankton grazing on planktonic marine bacteria by its impact on bacterial production. Microbiol Ecol 10:137–149
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Salonen, K., Hammar, T. On the importance of dissolved organic matter in the nutrition of zooplankton in some lake waters. Oecologia 68, 246–253 (1986). https://doi.org/10.1007/BF00384795
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DOI: https://doi.org/10.1007/BF00384795