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The effect of high flow events on mussels (Mytilus edulis) in the Conway estuary, North Wales, UK
Oliver, L.R.; Seed, R.; Reynolds, B. (2008). The effect of high flow events on mussels (Mytilus edulis) in the Conway estuary, North Wales, UK, in: Davenport, J. et al. (Ed.) Challenges to Marine Ecosystems: Proceedings of the 41st European Marine Biology Symposium, held in Cork, Ireland, 4-8 September 2005. Developments in Hydrobiology, 202: pp. 117-127
In: Davenport, J. et al. (Ed.) (2008). Challenges to Marine Ecosystems: Proceedings of the 41st European Marine Biology Symposium, held in Cork, Ireland, 4-8 September 2005. Developments in Hydrobiology, 202. European Marine Biology Symposia, 41. ISBN 978-1-4020-8807-0. 211 pp., more
In: Dumont, H.J. (Ed.) Developments in Hydrobiology. Kluwer Academic/Springer: The Hague; London; Boston; Dordrecht. ISSN 0167-8418, more

Also published as
  • Oliver, L.R.; Seed, R.; Reynolds, B. (2008). The effect of high flow events on mussels (Mytilus edulis) in the Conway estuary, North Wales, UK. Hydrobiologia 597(1): 117-127. dx.doi.org/10.1007/s10750-008-9339-7, more

Available in  Authors 
Document type: Conference paper

Keywords
    Climatic changes; Estuarine environment; High tide; Immunology; Mussels; Mussels; Nutrients (mineral); Rain; River flow; Salinity; Sediment transport; Sediments; Species diversity; Mytilus edulis Linnaeus, 1758 [WoRMS]; ANE, British Isles, Wales, Conway Estuary [Marine Regions]; Marine
Author keywords
    High flow

Authors  Top 
  • Oliver, L.R.
  • Seed, R., more
  • Reynolds, B.

Abstract
    One of the predicted consequences of climate change is an increase in the occurrence of extreme rainfall and a subsequent increase in frequency of high flow events in rivers. High flow events have the potential to impact estuarine communities like mussel assemblages due to decreased salinity and/or the transport of sediments, organic matter and nutrients from the terrestrial environment to the estuary. The impact of two high flow events was investigated using mussels located within the Conwy estuary, North Wales, using the 'Beyond BACI' approach. Three study sites were chosen, the potentially impacted site (Conwy) and two control sites located outside the estuary. Sampling took place over 18 months with samples being collected before and after each event. On each sampling occasion, the following data were collected: the total haemocyte count (THC) and condition index (CI) of the mussels and the diversity (Hlog e) of their associated macrofauna. A significant effect of the first event (22nd October 2004) was found on the CI of the Conwy mussels, whereas a significant effect of the second event (10th October 2005) was found on mussel THC. No effect of either event was found on the diversity of the associated fauna. The results of this study suggest that any increase in the number or intensity of heavy precipitation or high flow events have potential implications for the health and resilience of estuarine mussel populations.

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