Abstract
An experimental approach was taken to examine the processes of detritus decomposition in river sediments.Addition of macrophyte detritus (Alternanthera philoxeroides (Mart.) Griseb) to river sediment resultedin an increase in carbon mineralization from a “sbasal” rate of 200 up to 500 mg C m−2 d−1.Carbon mineralization after addition of oak detritus was only slightly higher than mineralization in sediments thatreceived no addition (∼ 200 mg C m−2 d−1). Bacterial biomass and production in sediments \s+ alligator-weedwere higher than in sediments + oak or zero-addition. In these experiments the major fate of addedalligatorweed was mineralization. For alligatorweed detritus, microbial metabolism depletes organic carbonrather than leading to increases in food quality. Therefore, a pulse input of alligatorweed detritus would notbe available as a long-term source of organic carbon. Oak detritus was not rapidly decomposed, and sopersists in these sediments for a longer period.
Similar content being viewed by others
References
Andersen, F. & B. Hargrave, 1984. Effects of Spartina detritus enrichment on aerobic/anaerobic benthic metabolism in an intertidal sediment. Mar. Ecol. Prog. Ser. 16: 161–171.
Conners, M. E. & R. J. Naiman, 1984. Particulate allochthonous inputs; relationships with stream size in an undisturbed watershed. Can. J. Fish. Aquat. Sci. 41: 1473–1484.
Cuffney, T. F., 1984. Characteristics of riparian flooding and its impact upon the processing and exchange of organic matter in coastal plains streams of Georgia. Ph. D. Dissertation, Univ. of Georgia, Athens, GA 168 pp.
Edwards, R. T., 1985. The role of seston bacteria in the metabolism and secondary production dynamics of southeastern blackwater rivers. Ph.D. Dissertation, University of Georgia, Athens, GA 174 pp.
Findlay, S. & J. Meyer, 1984. Significance of bacterial biomass and production as an organic carbon source in lotic detrital systems. Bull. Mar. Sci. 35: 318–325.
Findlay, S., J. Meyer & R. T. Edwards, 1984. Measuring bacterial production via rate of incorporation of [3H]thymidine into DNA. J. Microbiol. Meth. 2: 57–72.
Findlay, S., J. Meyer & R. Risley, 1986. Benthic bacterial biomass and production in two blackwater rivers. Can. J. Fish. Aquat. Sci. 43: 1271–1276.
Godshalk, G. L. & R. G. Wetzel, 1978. Decomposition of aquatic angiosperms. II. Particulate components. Aquat. Bot. 5: 301–327.
Graf, G., R. Schulz, R. Peinert & L. A. Meyer-Reil, 1983. Benthic response to sedimentation events during autumn to spring at a shallow water station in the western Kiel bight. Mar. Biol. 77: 235–246.
Hargrave, B. T., 1972. Aerobic decomposition of sediment and detritus as a function of particle surface area and organic content. Limnol. Oceanogr. 17: 583–596.
Hargrave, B. T., 1978. Seasonal changes in oxygen uptake by settled particulate matter and sediments in a marine bay. J. Fish. Resch. Bd. Can. 35: 1621–1628.
Hartwig, E. O., 1976. Nutrient cycling between the water column and a marine sediment. I. Organic carbon. Mar. Biol. 34: 285–295.
Iturriaga, R., 1979. Bacterial activity related to sedimenting particulate matter. Mar. Biol. 55: 157–169.
Kaplan, L. & T. Bott, 1983. Microbial heterotrophic utilization of dissolved organic matter in a piedmont stream. Freshwat. Biol. 13: 363–377.
Kelly, J. R. & S. W. Nixon, 1984. Experimental studies of the effect of organic deposition on the metabolism of a coastal marine bottom community. Mar. Ecol. Prog. Ser. 17: 157–169.
Molongoski, J. & M. Klug, 1980. Anaerobic metabolism of particulate organic matter in the sediments of a hypereutrophic lake. Freshwat. Biol. 10: 507–518.
Moriarty, D. (in press). Measurements of bacterial growth rates in aquatic systems using rates of nucleic acid synthesis. Adv. Aquatic Microbiol. V. 3.
Mulholland, P., 1981. Organic carbon flow in a swamp-stream ecosystem. Ecol. Monogr. 51: 307–322.
Naiman, R., 1982. Characteristics of sediment and organic carbon export from pristine boreal forest watersheds. Can. J. Fish. Aquat. Sci. 39: 1699–1718.
Odum, W. E. & M. A. Heywood, 1978. Decomposition of intertidal freshwater marsh plants. pp. 89–97. In R. E. Good, D. Whigham, R. L. Simpson & C. G. Jackson (eds.), Freshwater Wetlands. Academic Press, NY.
Tenore, K. R., L. Cammen, S. Findlay & N. W. Phillips, 1982. Factors regulating availability of detritus to macroconsumers are related to source of detritus. J. Mar. Res. 40: 473–490.
Vannote, R., G. Minshall, K. Cummins, J. Sedell & C. Cushing, 1980. The river continuum concept. Can. J. Fish. Aquat. Sci. 37: 130–137.
Wallace, J. B. & J. O'Hop, 1985. Life on a fast pad: Waterlily leaf beetle impact on water lilies. Ecology 66: 1534–1544.
Ward, G. M. & K. W. Cummins, 1979. Effects of food quality on growth of a stream detritivore, Paratendipes albimanus (Meigen) (Diptera: Chironomidae). Ecology 60: 57–64.
Wassman, P., 1984. Sedimentation and benthic mineralization of organic detritus in a Norwegian fjord. Mar. Biol. 83: 83–94.
Wetzel, R. G., P. H. Rich, M. C. Miller & H. L. Allen, 1972. Metabolism of dissolved and particulate detrital carbon in a temperate hard-water lake. Mem. Ist. Ital. Idrobiol. 29: 185–243.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Findlay, S., Smith, P.J. & Meyer, J.L. Effect of detritus addition on metabolism of river sediment. Hydrobiologia 137, 257–263 (1986). https://doi.org/10.1007/BF00004239
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00004239