Vegetation growth in rivers: influences upon sediment and nutrient dynamics
- 1 June 2002
- journal article
- research article
- Published by SAGE Publications in Progress in Physical Geography: Earth and Environment
- Vol. 26 (2), 159-172
- https://doi.org/10.1191/0309133302pp324ra
Abstract
Hydrological and geomorphological research in river environments has largely ignored the influence of instream vegetation growth; focusing rather on the role of riparian vegetation as a control on bank stability or as a potential buffer for dissolved and particulate material entering the channel from the hillslope. However, in many lowland streams instream vegetation may be abundant and reach high levels of biomass during the growing season. These instream plants (macrophytes) have a significant effect on flow, sediment and nutrient dynamics. Plant growth may cause increased frictional resistance to flow and through flow diversion may have a short-to medium-term influence on instream channel geomorphology. Additionally, this effect of plants upon flow velocities within the channel has an impact on sedimentation patterns. Rooted plants also function as a link between bed sediments and the water column, thus plants have a key role in the cycling of nutrients between these two components of the fluvial system. This, combined with the uptake and temporary storage of nutrients by the plants and the retention of fine sediments within dense plant stands, has the result that plants within rivers are an integral component of nutrient dynamics. A review of research on the role of macrophytes in fluvial system nutrient dynamics is presented and identifies the need for an increased understanding and recognition of the role of plants in the functioning of fluvial systems as a whole.Keywords
This publication has 53 references indexed in Scilit:
- Sediment nutrient characteristics and aquatic macrophytes in lowland English riversScience of The Total Environment, 2001
- Formation of root plaques and their influence on tissue phosphorus content in Lobelia dortmannaAquatic Botany, 1998
- Interferences between root plaque formation and phosphorus availability for isoetids in sediments of oligotrophic lakesBiogeochemistry, 1998
- Influence of the submersed plant, Potamogeton perfoliatus, on nitrogen cycling in estuarine sedimentsLimnology and Oceanography, 1992
- The loss of submerged plants with eutrophication I. Experimental design, water chemistry, aquatic plant and phytoplankton biomass in experiments carried out in ponds in the Norfolk BroadlandFreshwater Biology, 1989
- Influence of Nutrient Enrichment and Light Availability on the Abundance of Aquatic Macrophytes in Florida StreamsCanadian Journal of Fisheries and Aquatic Sciences, 1988
- Nutrient Dynamics in a Littoral Sediment Colonized by the Submersed Macrophyte Myriophyllum spicatumCanadian Journal of Fisheries and Aquatic Sciences, 1985
- Trophic State Classification of Lakes with Aquatic MacrophytesCanadian Journal of Fisheries and Aquatic Sciences, 1983
- Sediment-based nutrition of submersed macrophytesAquatic Botany, 1981
- Phosphorus Sources for Aquatic Weeds: Water or Sediments?Science, 1980