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Habitat requirements of characteristic wildlife communities
Human activities and their impacts
3 other sections not shown
algae algal aquatic aquifer arable associated banks bankside bird brook water-crowfoot brown trout catchment Cetti's warbler chalk river systems chalk streams characteristic classic chalk stream crop crowfoot current velocities densities dominance downstream English Nature Environment Agency epiphytic erosion fauna fish farms fishery flood defence Flood meadows floodplain Frome gravel grayling grazing Grey wagtail groundwater growth Hampshire Avon hydrological impact important increased instream invertebrate Itchen Kennet lamprey levels livestock loads low flows lower reaches Mainstone marginal mute swan native crayfish non-native particularly particulate perennial headwaters phosphorus phosphorus concentrations plant communities plant species Plate populations Ranunculus beds reduced reed reed bunting reedbeds regime riparian areas river flow river network riverine run-off salmon salmonid scour sedge Sedge Warbler sediment shallow silt siltation soil spawning submerged substrates summer Table target typically vegetation wagtail warbler water column water meadows Water rail water-cress water-crowfoot weed-cutting wetland whilst winter winterbourne winterbourne sections