LOGIN TO YOUR ACCOUNT

Username
Password
Remember Me
Or use your Academic/Social account:

CREATE AN ACCOUNT

Or use your Academic/Social account:

Congratulations!

You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.

Important!

Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message

CREATE AN ACCOUNT

Name:
Username:
Password:
Verify Password:
E-mail:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Clews, Esther.
Languages: English
Types: Doctoral thesis
Subjects: Q1
Rod catches of Atlantic salmon (Salmo salar) from the River Wye were previously the greatest in England and Wales. However, a 30-year decline in catches of salmon and brown trout (S. trutta ) prompted management action. Since 1996, the Wye and Usk Foundation have excluded livestock, managed riparian trees, protected banks, cleared migratory barriers and limed selected tributaries. The aim was to enhance salmon habitat and extend spawning opportunities. The outcomes of such activities in Britain are still poorly understood. This thesis i) identified variations in the water quality, aquatic invertebrates and salmonids of the Wye catchment ii) evaluated the impact of recent management on habitats and aquatic organisms iii) assessed whether any larger-scale factors could explain management effects. Because no suitable project-specific data were collected, routine monitoring data and surveys were applied in the most applicable post-hoc experimental designs. Ecological quality varied widely among the Wye's tributaries. Combined biotic indices supported the need to mitigate acidification in some upland streams and reduce diffuse nutrients in the lower catchment. Riparian management appeared to reduce bank poaching and increase algae by comparison with reference streams. Post-treatment invertebrate communities were richer in recently managed streams than in controls. However, there was no evidence that management reversed the decline in salmonid populations. The typical life-cycle of salmonids in the Wye might delay response to management, but this effect cannot be evaluated with only six years' post-treatment data. Alternatively, local effects could be masked by larger-scale trends. In particular, salmonid abundance in the Wye declines significantly with increasing summer temperatures, decreasing summer rainfall and discharge. I conclude that riparian management has had some of the desired outcomes at the reach or tributary scale. However, salmonid numbers in the Wye potentially reflect climatic effects, implying a need to consider climate-change in future management action.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Aprahamian, M.W., Martin Smith, K., McGinnity, P., McKelvey, S. and Taylor, J. (2003) Restocking of salmonids - opportunities and limitations. Fisheries Research 62 211- 227.
    • Armstrong, J.D., Kemp, P.S., Kennedy, G.J.A., Ladle, M. and Milner, N.J. (2003) Habitat requirements of Atlantic salmon and brown trout in rivers and streams. Fisheries Research 62 143-170.
    • Bodie, J.R. (2001) Stream and riparian management for freshwater turtles. 62 443-455.
    • Byrne, C.J., Poole, R., Dillane, A., Rogan, G. and Whelan, K.F. (2004) Temporal and environmental influences on the variation in sea trout (Salmo trutta L.) smolt migration in the Burrishoole system in the west of Ireland from 1971 to 2000. Fisheries Research 66 85-94.
    • Byrne, C.J., Poole, R., Rogan, G., Dillane, M. and Whelan, K.F. (2003) Temporal and environmental influences on the variation in Atlantic salmon smolt migration in the Burrishoole system 1970-2000. Journal of Fish Biology 63 1552-1564.CCW (Countryside Council for Wales) (2006a) River Wye (Lower Wye) Site of Special Scientific Interest: citation, http://www.ccw.gov.uk/protected_sites/ [Accessed 12/7/06]
    • CCW (Countryside Council for Wales) (2006b) River Wye (Upper Wye) Site of Special Scientific Interest: citation, http://www.ccw.gov.uk/protected_sites/ [Accessed 12/7/06]
    • CCW (Countryside Council for Wales) (2006c) River Wye (Tributaries) Site of Special Scientific Interest: citation, http://www.ccw.gov.uk/protected_sites/ [Accessed 12/7/06]
    • CCW (Countryside Council for Wales) (2006d) Tir Gofal. http://www.ccw.gov.uk/ generalinfo/index.cfm?Action=ResourceMore&ResourceID=26&Subject=Agriculture &lang=en [Accessed 12/7/06]
    • Crozier, W.W. and Kennedy, G.J.A. (1994) Application of semi-quantitative electrofishing to juvenile salmonid stock surveys. Journal of Fish Biology 45 159-164.
    • Crozier, L. and Zabel, R.W. (2006) Climate impacts at multiple scales: evidence for differential population responses in juvenile Chinook salmon. Journal of Animal Ecology 75 1100-1109.
    • Danger, A.R. and Robson, B.J. (2004) The effects of land use on leaf-litter processing by macroinvertebrates in an Australian temperate coastal stream. Aquatic Sciences 66 296-304.
    • DEFRA (Department for Environment, Food and Rural Affairs) (2004) Developing Measures to Promote Catchment-Sensitive Farming. A joint DEFRA-HM Treasury Consultation. Department for Environment, Food and Rural Affairs, London, UK.
    • Directive 92/43/EEC on the conservation of natural habitats and of wild fauna and flora (1992) The European Parliament and Council.http://ec.europa.eu/environment /nature/nature_conservation/eu_nature_legislation/habitats_directive/index_en.htm [Accessed 27/11/06] *
    • Directive 2000/60/EC of the European Parliament and of the Council establishing a framework for the Community action in the field of water policy (2000) The European Parliament and Council. http://eur-lex.europa.eu/pri/en/oj/dat/2000/ l_327Zl_32720001222en00010072.pdf [Accessed 12/7/06]
    • Hendry, K., Cragg-Hine, D., O'Grady, M., Sambrook, H. and Stephen, A. (2003) Management of habitat for rehabilitation and enhancement of salmonid stocks. Fisheries Research 62 171-192.
    • Imhof, J.G., Fitzgibbon, J. and Annable, W.K. (1996) A hierarchical evaluation system for characterizing water shed ecosystems for fish habitat. Canadian Journal of Fisheries and Aquatic Sciences 53 312-326.
    • JNCC (Joint Nature Conservance Council) (2006) River Wye. Special Area of Conservation UK0012642. http://www.jncc.gov.uk/protectedsites/SACselection/ sac.asp?EUCode=UKOO12642 [Accessed 12/7/06]
    • Kauffman, J.B., Beschta, R.L., Otting, N. and Lytjen, D. (1997) An ecological perspective of riparian and stream restoration in the western United States. Fisheries Research 22 12-24.
    • Keim, R.F., Skaugset, A.E. and Bateman, D.S. (2002) Physical aquatic habitat II. Pools and cover affected by large woody debris in three western Oregon streams. North American Journal of Fisheries Management 22 151-164.
    • Kiffney, P.M., Richardson, J.S. and Bull, J.P. (2003) Responses of periphyton and insects to experimental manipulation of riparian buffer width along forest streams. Journal of Applied Ecology 40 1060-1076.
    • Kinley, T.A. and Newhouse, N.J. (1997) Relationship of riparian reserve zone width to bird density and diversity in southeastern British Columbia. 71 75-86.
    • Krog, C. and Hermansen, H. (1985) Physical structure and brown trout (Salmo trutta fario) populations in small Danish lowland streams. In: Alabaster, J.S. (Ed.) Habitat modification and freshwater fisheries. Butterworths, London, UK.
    • Lepori, F., Palm, D. and Malmqvist, B. (2005) Effects of stream restoration on ecosystem functioning: detritus retentiveness and decomposition. Journal of Applied Ecology 42 228-238.
    • Liljaniemi, P., Vuori, K., Ilyashuk, B. and Luotonen, H. (2002) Habitat characteristics and macroinvertebrate assemblages in boreal forest streams: relations to catchment silvicultural activities. Hydrobiologia 474 239-251.
    • Logan, P. and Furse, M. (2002) Preparing for the European Water Framework Directive - making the links between habitat and aquatic biota. Aquatic Conservation: Marine and Freshwater Ecosystems 12 245-237.
    • Lussier, S.M., Enser, R.W., Dasilva, S.N. and Charpentier, M. (2006) Effects of habitat disturbance from residential development on breeding bird communities in riparian corridors. Environmental Management 38 504-521.
    • Naiman, R.J., Decamps, H. and McClain, M.E. (2005) Riparia. Ecology, Conservation! and Management of Streamside Communities. Elsevier/Academic Press, San Diego.
    • McGinnity, P. (2002) Catchment approach to restoring natural stream processes. 13th International Salmonid Habitat Enhancement Workshop Central Fisheries Board, Westport, Co. Mayo, Ireland.
    • Minns, C.K., Kelso, J.R.M. and Randall, R.G. (1996) Detecting the response of fish to habitat alterations in freshwater ecosystems. Canadian Journal of Fisheries and Aquatic Sciences 53 403-414.
    • Mustow, S.E. (2002) Biological monitoring of rivers in Thailand: use and adaptation of the BMWP score. Hydrobiologia 479 191-229.
    • Shirley, S.M. and Smith, J.N.M. (2005) Bird community structure across riparian buffer strips of varying width in a coastal temperate forest. Biological Conservation 125 475- 489.
    • Solomon, D J. (2003) Special issue - The scientific basis for management of salmonid stocks in the British Isles - Foreword. Fisheries Research 62 109.
    • Solomon, D.J., Mawle, G.W. and Duncan, W. (2003) An integrated approach to salmonid management. Fisheries Research 62 229.
    • Tyler, S.J. and Ormerod, S.J. (1991) The Influence of Stream Acidification and Riparian Land-Use on the Breeding Biology of Gray Wagtails Motacilla-Cinerea in Wales. Ibis 133 286-292.
    • Verdonschot, P.F.M. (2000) Integrated ecological assessment methods as a basis for sustainable catchment management. Hydrobiologia 422/423 389-412.
    • Watanabe, M., Adams, R.M., Wu, J.J., Bolte, J.P., Cox, M.M., Johnson, S.L., Liss, W.J., Boggess, W.G. and Ebersole, J.L. (2005) Toward efficient riparian restoration: integrating economic, physical, and biological models. Journal of Environmental Management 75 93-104.
    • Ward, J.V. (1998) Riverine landscapes: Biodiversity patterns, disturbance regimes, and aquatic conservation. Biological Conservation 83 269-278.
    • Wissmar, R.C. and Beschta, R.L. (1998) Restoration and management of riparian ecosystems: a catchment perspective. Freshwater Biology 40 571-585.
    • Wright, J.F., Clarke, R.T., Gunn, R.J.M., Winder, J.M., Kneebone, N.T. and DavyBowker, J. (2003) Response of the flora and macroinvertebrate fauna of a chalk stream site to changes in management. Freshwater Biology 48 894-911.
    • Wright, J.F., Furse, M.T. and Moss, D. (1998) River classification using invertebrates: RIVPACS applications. Aquatic Conservation-Marine and Freshwater Ecosystems 8 617-631.
    • Wye and Usk Foundation (2006a) History of the Foundation. [WWW] http://www.wyeuskfoundation.org/history.php [Accessed:6/11/2006].
    • Wye and Usk Foundation (2006b) WHIP - The Wye Habitat Improvement Project. [WWW] http://www.wyeuskfoundation.org/projects/whip.php Accessed:6/11/2006].
    • Wye and Usk Foundation (2006c) pHish - Powys Habitat Improvement Scheme [WWW] http://www.wyeuskfoundation.org/projects/phish.php Accessed:6/11/2006].
    • Zaimes, G.N., Schultz, R.C. and Isenhart, T.M. (2004) Stream bank erosion adjacent to riparian forest buffers, row-crop fields, and continuously-grazed pastures along Bear Creek in central Iowa. Journal of Soil and Water Conservation 59 19-27.
    • ZamoraMunoz, C. and AlbaTercedor, J. (1996) Bioassessment of organically polluted Spanish rivers, using a biotic index and multivariate methods. Journal of the North American Benthological Society 15 332-352.
    • Zoellick, B.W., Ulmschneider, H.M. and Stanley, A.W. (2005) Distribution and composition of mammalian predators along the snake river in southwestern Idaho. Northwest Science 79 265-272.
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article