Ratcliffe J.B.,Natural Resources Wales |
Bateson D.M.,South Stack Visitor Center
Journal of Coastal Conservation | Year: 2015
The coast of Holy Island, situated off the Isle of Anglesey, Wales, is recognised for its geological, biological, cultural, aesthetic and recreational values by multiple conservation designations. The ecological functions of geology, climate, soil, biota, human history and current management in shaping this landscape are outlined. Much of the site is now managed by the RSPB as their “South Stack” nature reserve. The challenge of addressing the sometimes conflicting objectives of diverse interests in an iconic landscape is described. Solutions have developed through monitoring of key features and understanding of ecological relationships and through close liaison between local managers and the various communities of interest. In the process pioneering approaches have been developed which are now accepted practice elsewhere. © 2014, Springer Science+Business Media Dordrecht.
Young K.A.,Natural Resources Wales
Fisheries Management and Ecology | Year: 2013
The debate over Atlantic salmon, Salmo salar L., stocking in Britain centres on the trade-off between enhancing rod fisheries and harming wild populations. This article informs the debate by quantifying the relationship between stocking and angler catch statistics for 62 rivers over 15 years. After controlling for environmental factors affecting adult abundance, the 42 rivers with stocking had non-significantly lower mean catch statistics than the 20 rivers without stocking. This difference increased with the age of stocked fish. Among stocked rivers, weak relationships between mean stocking effort and catch statistics also became more negative with the age of stocked fish. For stocked rivers, there was no evidence for a generally positive relationship between annual stocking efforts and catch statistics. Those rivers for which stocking appeared to improve annual rod catches tended to have lower than expected mean rod catches. The results suggest the damage inflicted on wild salmon populations by stocking is not balanced by detectable benefits to rod fisheries. © 2013 John Wiley & Sons Ltd.
Rimington N.,Natural Resources Wales
Coasts, Marine Structures and Breakwaters 2013: From Sea to Shore - Meeting the Challenges of the Sea | Year: 2014
Beaches are a key natural, social and economic resource for Wales. They play a vital role in sustaining coastal tourism and underpin important nature conservation and landscape sites and act as 'natural' coastal defences, dissipating wave energy, helping to protect both natural and manmade structures. In an era of climate change and sea level rise The way that coastal erosion and flood risks are managed is changing and responses, such as building sea walls, groynes, revetments and other large structures are becoming less sustainable, environmentally and financially. Beach nourishment may offer a way of managing risk that works more with natural coastal processes. Three related projects to investigate some of the issues associated with beach nourishment in Wales focussed on 10 case study beaches. The initial Pilot Study investigated the potential requirements for the quantity of beach nourishment material (sand, shingle, gravel, etc.) that may be needed to maintain the height of the beaches over 20, 50 and 100 years. The Phase 2 study looked at a range of information regarding the practicalities of re-building beaches, including workshops with key stakeholders, a review of all Welsh Shoreline Management Plans (SMP2s) and an investigation of the potential resource and economic constraints of beach nourishment. The third project attempted to establish the current level of knowledge regarding the ecological impacts (both positive and negative) of beach nourishment on the intertidal ecology of Welsh beaches by identifying biotopes potentially at risk using the results of Phase 1 intertidal habitat surveys. © Thomas Telford Limited 2014.
Orr H.G.,UK Environment Agency |
Simpson G.L.,University of Regina |
des Clers S.,University College London |
Watts G.,UK Environment Agency |
And 7 more authors.
Hydrological Processes | Year: 2015
Changes in water temperature can have important consequences for aquatic ecosystems, with some species being sensitive even to small shifts in temperature during some or all of their life cycle. While many studies report increasing regional and global air temperatures, evidence of changes in river water temperature has, thus far, been site specific and often from sites heavily influenced by human activities that themselves could lead to warming. Here we present a tiered assessment of changing river water temperature covering England and Wales with data from 2773 locations. We use novel statistical approaches to detect trends in irregularly sampled spot measurements taken between 1990 and 2006. During this 17-year period, on average, mean water temperature increased by 0.03°C per year (±0.002°C), and positive changes in water temperature were observed at 2385 (86%) sites. Examination of catchments where there has been limited human influence on hydrological response shows that changes in river flow have had little influence on these water temperature trends. In the absence of other systematic influences on water temperature, it is inferred that anthropogenically driven climate change is driving some of this trend in water temperature. © 2014 The Authors.
O'Brien M.,Natural Resources Wales
Dams and Reservoirs | Year: 2015
On 1 April 2016 the Reservoirs Act 1975 will be amended in Wales with new regulations coming into force. © 2015, ICE Publishing. All Rights Reserved.