Short-Term impacts of weed cutting on physical habitats in lowland rivers – the importance of initial environmental conditions

• Autorzy: Pedersen M.L. , Baattrup A. , Rorth F. R. , Madsen T. V. , Larsen S. E.
• Języki publikacji: EN

Abstrakty

EN

We studied the effects of weed cutting at 3 reaches in two Danish lowland rivers with the objectives of examining the response to cutting in rivers with contrasting physical conditions, macrophyte diversity, and assemblage patterns. Physical characteristics and abundance of macrophyte species were registered 3 or 4 times throughout the study period on all reaches. Weed cutting did not affect the total coverage of stone, gravel and sand and substratum homogeneity, and no common response was found among the reaches. This result is likely to reflect both initial differences in the physical environment among the reaches as well as differences in macrophyte coverage and assemblage patterns. Water depth, variability in current velocity and the coverage of stone and sand were affected by coverage independent of assemblage patterns, whereas the river bed substratum homogeneity was affected by coverage, as well as assemblage pattern. The analysis indicated that diverse macrophyte communities with several growth morphologies enhance the spatial variability in substratum characteristics compared to reaches with a less diverse and more homogeneous distribution of species.

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2011
• Tom: 20
• Numer: 5
• Opis fizyczny: p.1271-1280,fig.,ref.

Twórcy

autor

Pedersen M.L.

• Department of Civil Engineering, Aalborg University, Sohgaardsholmsvej 57, DK-9000 Aalborg, Denmark

autor

Baattrup A.

• National Environmental Research Institute, Aarhus University, Vejlsøvej 25, P. O. Box 314, DK-8600 Silkeborg, Denmark

autor

Rorth F. R.

• National Environmental Research Institute, Aarhus University, Vejlsøvej 25, P. O. Box 314, DK-8600 Silkeborg, Denmark
• Department of Biological Sciences, Plant Biology, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark

autor

Madsen T. V.

• Department of Biological Sciences, Plant Biology, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark

autor

Larsen S. E.

• National Environmental Research Institute, Aarhus University, Vejlsøvej 25, P. O. Box 314, DK-8600 Silkeborg, Denmark

Bibliografia

• 1. WESTLAKE D. F. Macrophytes. In: Whitton B. A. (Ed.) River Ecology. Blackwell Scientific Publications, Oxford, pp. 106-128, 1975.
• 2. GREGG W. W., ROSE F. L. The effects of aquatic macrophytes on the stream microenvironment. Aquat. Bot. 14, 309, 1982.
• 3. SAND-JENSEN K., JEPPESEN E., NIELSEN K., VAN DER BIJL L., HJERMIND L., NIELSEN L. W., IVERSEN T. M. Growth of macrophytes and ecosystem consequences in a lowland Danish stream. Freshwater Biol. 22, 15, 1989.
• 4. SAND-JENSEN K., MEBUS J. R. Fine-scale patterns of water velocity within macrophyte patches in streams. Oikos 76, 169, 1996.
• 5. SAND-JENSEN K. Macrophytes as biological engineers in the ecology of Danish streams. In: Sand-Jensen K., Vestergaard O. (Eds.) Freshwater Biology – Priorities and development in Danish Research. GAD, Copenhagen, pp 74-101, 1997.
• 6. CHAMBERS P. A., DEWREEDE R. E., IRLANDI E. A., VANDERMEULEN H. Management issues in aquatic macrophyte ecology: a Canadian perspective. Can. J. Bot. 77, 471, 1999.
• 7. DAWSON F. H., KERN-HANSEN U. Aquatic weed management in natural streams: the effect of shade by the marginal vegetation. Verh. Internat. Verein. Limnol. 20, 1451, 1978.
• 8. BAATTRUP-PEDERSEN A., SKRIVER J., WIBERGLARSEN P. Weed-cutting practice and impact on trout density in Danish lowland streams. Verh. Internat. Verein. Limnol. 27, 674, 2001.
• 9. WRIGHT J. F., CLARKE R. T., GUNN R. J. M., WINDER J. M., KNEEBONE N. T., DAVY-BOWKER J. Response of the flora and macroinvertebrate fauna of a chalk stream site to changes in management. Freshwater Biol. 48, 894, 2003.
• 10. BAATTRUP-PEDERSEN A., LARSEN S. E., RIIS T. Long-term effects of stream management on plant communities in two Danish lowland streams. Hydrobiologia 481, 33, 2002.
• 11. RIIS T., SAND-JENSEN K. Historical changes in species composition and richness accompanying pertubation and eutrophication of Danish lowland streams over 100 years. Freshwater Biol. 46, 269, 2001.
• 12. BAATTRUP-PEDERSEN A., RIIS T. Impacts of different weed cutting practices on macrophyte species diversity and composition in a Danish stream. River Res. Appl. 20, 103, 2004.
• 13. TANIGUCHI H., NAKANO S., TOKESHI M. Influences of habitat complexity on the diversity and abundance of epiphytic invertebrates on plants. Freshwater Biol. 48, 718, 2003.
• 14. KAENEL B. R., UEHLINGER U. Effects of plant cutting dredging on habitat conditions in streams. Arch. Hydrobiol. 143, 257, 1998.
• 15. WENTWORTH C. K. A scale of grade and class terms for clastic sediments. J. Geol. 30, 377, 1922.
• 16. HANSEN K. Dansk Feltflora. Nordisk Forlag, Copenhagen, 1981 [In Danish].
• 17. MOESLUND B., LŘJTNANT B., MATHIESSEN H., MATHIESSEN L, PEDERSEN A., THYSSEN N., SCHOU J. C. Danske Vandplanter. Environmental News No. 2. Danish Environmental Protection Agency, Copenhagen, 1990 [In Danish].
• 18. WHITE K. E. Dilution Methods. In: Hershey R. W. (Ed.) Hydrometry: Practice and Principles. John Wiley and Sons, Chichester, pp 111-148, 1978.
• 19. RIIS T., SAND-JENSEN K., VESTERGĹRD O. Plant communities in lowland Danish streams: species composition and environmental factors. Aquat. Bot. 66, 255, 2000.
• 20. MCCUNE B., MEFFORD M. J. PCORD User’s Guide, version 4. Multivariate analysis of ecological data. MjM software Design, Gleneden Beach, Oregon, 1999.
• 21. BAATTRUP-PEDERSEN A., RIIS T. Macrophyte diversity and composition in relation to substratum characteristics in regulated and unregulated Danish streams. Freshwater Biol. 42, 375, 1999.
• 22. SNEDECOR G.W., COCHRAN W.G. Statistical methods. Iowa State University Press, Ames, Iowa, 1989.
• 23. SAS INSTITUTE. SAS System software version 8.2. SAS Inc. Cary, New York, 2000.
• 24. SAND-JENSEN K. Influence of submerged macrophytes on sediment composition and near-bed flow in lowland streams. Freshwater Biol. 39, 663, 1998.
• 25. TANIGUCHI H., TOKESHI M. Effects of habitat complexity on benthic assemblages in variable environment. Freshwater Biol. 49, 1164, 2004.
• 26. SCHUTTEN J., DAVY A. J. Predicting the hydraulic forces on submerged macrophytes from current velocity, biomass and morphology. Oecologia 123, 445, 2000.
• 27. SAND-JENSEN K. Drag and reconfiguration of freshwater macrophytes. Freshwater Biol. 48, 271, 2003.
• 28. SAND-JENSEN K., MADSEN T. V. Invertebrates graze submerged rooted macrophytes in lowland streams. Oikos 55, 420, 1989.
• 29. SVENDSEN L. M., KRONVANG B. Retention of Nitrogen and Phosphorus in a Danish Lowland River System – Implications for the Export from the Watershed. Hydrobiologia 251, 123, 1993.
• 30. BAATTRUP-PEDERSEN A., LARSEN S. E., RIIS T. Composition and richness of macrophyte communities in small Danish streams – influence of environmental factors and weed cutting. Hydrobiologia 195, 171, 2003.
• 31. PEDERSEN M. L., FRIBERG N., LARSEN S. E. Physical habitat structure in Danish lowland streams. River. Res. Appl. 20, 653, 2004