Abstract
Glass-beads (diam. = 250 µm) were buried 10 cm deep in the sediment of a stream. After an exposure of eight weeks, bacterial densities on the beads varied between 2.7 × 105 and 2.4 × 107/cm2, and the length of the fungal mycelium between 0.2 and 5.3 mm/cm2. Bacterial densities did not show any correlation with the DOC content of the water, but were positively correlated with respiration on the beads. Fungal mycelium was negatively correlated with water temperature. Acid hydrolysis of stream-exposed beads released sugars and amino acids, whose combined carbon content exceeded that of the microbial cells by a factor of at least 4. Gut extracts of Gammarus tigrinus and Tipula caloptera released amino acids and sugars from stream-exposed beads.
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References
Bärlocher, F., 1987. Aquatic hyphomycete spora in 10 streams of New Brunswick and Nova Scotia. Can. J. Bot. 65: 76–79.
Bärlocher, F., P. G. Tibbo & S. H. Christie, 1988. Formation of phenol-protein complexes and their use by two stream invertebrates. Hydrobiologia, in press.
Bott, T. L., L. A. Kaplan & F. T. Kuserk, 1984. Benthic bacterial biomass supported by streamwater dissolved organic matter. Microb. Ecol. 10: 335–344.
Crocker, M. T. & J. L. Meyer, 1987. Interstitial dissolved organic carbon in sediments of a southern Appalachian headwater stream. J. N. Am. Benthol. Soc. 6: 159–167.
Edwards, R. T., 1987. Sestonic bacteria as a food source for filtering invertebrates in two southeastern blackwater rivers. Limnol. Oceanogr. 32: 221–234.
Geesey, G. G., R. Mutch & J. W. Costerton, 1978. Sessile bacteria: An important component of the microbial population in small mountain streams. Limnol. Oceanogr. 23: 1214–1223.
Geesey, G. G., W. T. Richardson,H. G. Yeomans, R. T. Irvin & J. W. Costeron, 1977. Microscopic examination of natural sessile bacterial populations from an alpine stream. Can. J. Microbiol. 23: 1733–1736.
Harborne, J. B., 1984. Phytochemical methods. Chapman & Hall, London.
Hynes, H.B. N., 1983. Groundwater and stream ecology. Hydrobiologia 100: 93–99.
Kaplan, L. A. & T. L. Bott, 1983. Microbial heterotrophic utilization of dissolved organic matter in a Piedpont stream. Freshwat. Biol. 13: 363–377.
Kaplan, L. A. & T. L. Bott, 1985. Acclimation of stream-bed heterotrophic microflora: metabilic responses to dissolved organic matter. Freshwat. Biol. 15: 479–492.
Lee, D. R. & J. A. Cherry, 1978. A field exercise on groundwater flow using seepage meters and minipiezometers..J. Geol. Educ. 27: 6–10.
Lock, M. A., 1981. River epilithon — a light and organic energy transducer. In Lock, M. A. & D. D. Williams (eds), Perspectives in running water ecology. Plenum Press, New York: 3–40.
Lock, M. A., R. R. Wallace, J. W. Costerton, R. M. Ventullo & S. E. Charlton, 1984. River epilithon: toward a structural-functional model. Oikos 42: 10–22.
Martin, M. M. & J. S. Martin, 1984. Surfactants: their role in preventing the precipitation of proteins by tannins in insect guts. Oecologia (Berl) 61: 342–345.
Martin, M. M., J. S. Martin, J. J. Kukor & R. W. Merritt, 1980. The digestion of protein and carbohydrate by the stream detritivore, Tipula abdominalus (Diptera, Tipulidae). Oecologia (Berl) 46: 360–364.
Meyer, J. L., R. T. Edwards & R. Risley,1987. Bacterial growth on dissolved organic carbon from a blackwater river. Microb. Ecol. 13: 13–29.
Mickleburgh, S., M. A. Lock & T. E. Ford, 1984. Spatial uptake of dissolved organic carbon in river beds. Hydrobiologia 108: 115–119.
Nelson, N., 1944. A photometric adaptation of the Somogyi method for the determination of glucose. J. biol. Chem. 153: 375–380.
Rosen, H., 1957. A modified ninhydrin colorimetric analysis for amino acids. Arch. Bioch. Biophys. 67: 10–15.
Rounick, J. S. & M. J. Winterbourn, 1983. The formation, structure and utilization of stone surface organic layers in two New Zealand streams. Freshwat. Biol. 13: 57–72.
Rutherford, J. E. & H. B. N. Hynes, 1987. Dissolved organic carbon in streams and groundwater. Hydrobiologia 154: 33–48.
Somogyi, M., 1952. Notes on sugar determination. J. biol. Chem. 195: 19–23.
Williams, D. D., 1981. Migrations and distributions of stream benthos. In Lock, M. A. & D. D. Williams (eds), Perspectives in running water ecology. Plenum Press, New York: 155–207.
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Barlocher, F., H. Murdoch, J. Hyporheic biofilms — a potential food source for interstitial animals. Hydrobiologia 184, 61–67 (1989). https://doi.org/10.1007/BF00014302
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DOI: https://doi.org/10.1007/BF00014302