Stank Beck & tributaries, Harewood Estate Advisory Visit, March 2020 Prof J Grey:
[email protected] Index • Key Findings • Introduction • Catchment & Fishery Overview • Habitat Assessment Eccup Beck (upper) Sturdy Beck Eccup Beck (lower) Stubs House Beck Stank Beck • Recommendations Connectivity / Fish Passage Instream Habitat Riparian Habitat Monitoring • Making it Happen Key Findings • The Stank Beck catchment has been heavily modified historically. Major landscaping associated with creation of the Estate in the 18th Century (resulting in repeated impoundment of the becks) and the damming of Eccup Reservoir in the early 19th Century have taken their toll. • Unlike many of the other smaller tributaries within the wider Wharfe catchment, the proximity of intensive agriculture is less of an issue (aside from the deer herd), and there is copious raw woody material to work with. • While there is much historic value associated with individual structures, there is also sufficient space within the catchment to accommodate both history and ecology if so desired. Many barriers to connectivity could be simply bypassed. This alternative to removal also makes (potentially) inefficient, expensive or aesthetically- insensitive fish easements redundant. • Without restoring connectivity, fish populations will always be fragmented and challenged. However, slowing the flow of water from the land, reducing fine sediment pollution, and improving riparian and instream habitat will still provide enormous ecological benefits and ecosystem services. • Invasive non-native species, particularly rhododendron / azalea and Himalayan balsam have already been identified as issues along the channels and are gradually being dealt with – this should remain a priority to improve riparian habitat quality and resilience. • Diffuse pollution of fine sediment was rife in the Sturdy Beck sub- catchment, and a clear problem under the dense stands of INNS.