Affiliation:
1. School of Engineering University of Galway Galway Ireland
2. Ryan Institute University of Galway Galway Ireland
Abstract
AbstractFreshwater aquaculture can have negative impacts on chemical, physical and biological water quality. To contextualise the impact that these activities may have, a case study site in Ireland was monitored for 1 year. The study aims were to investigate the impact of freshwater aquaculture on water quality (biological, physical, and chemical) and the degree of the impact and recovery in water quality, within 1000 m downstream of a salmon smolt hatchery. The hatchery was monitored, at four locations (upstream, 10, 100, and 1,000 m downstream of the discharge point). Data on macroinvertebrate, macrophyte, hydromorphology and chemical characteristics were collected. Results for the physical monitoring indicated no significant changes in hydromorphology between up and downstream sites. Chemical water quality did decrease downstream in terms of nitrogen (N) and phosphorus (P). The greatest concentrations in N and P were found at 1000 m though it is likely additional contributions from agriculture impacted this site. Dissolved oxygen was steady throughout the monitoring campaign with a 13% variance between upstream and downstream locations. Changes in biological indices were statistically significant for taxa at all downstream sites. There were positive trends which indicated a degree of recovery in biotic indices.
Reference69 articles.
1. APHA. (2018a)Standard methods for the examination of water and wastewater: standard methods for the examination of water and wastewater (Test No. 2540 Solids).USA:American Public Health Association American Water Works Association Water Environment Federation. Available from:www.standardmethods.org
2. APHA. (2018b)Standard methods for the examination of water and wastewater: standard methods for the examination of water and wastewater (Test No. 5220 Chemical Oxygen Demand).USA:American Public Health Association American Water Works Association Water Environment Federation. Available from:www.standardmethods.org
3. An inspection-based assessment of obstacles to salmon, trout, eel and lamprey migration and river channel connectivity in Ireland
4. Ecological responses of aquatic macrophytes and benthic macroinvertebrates to dams in the Henares River Basin (Central Spain);Benítez‐Mora A.;The International Journal of Aquatic Sciences,2014
5. Shining a light on the loss of rheophilic fish habitat in lowland rivers as a forgotten consequence of barriers, and its implications for management
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献