Hydrology and the ecological quality of Scottish river ecosystems

Gilvear, David; Heal, Katherine; Stephen, Alastair

doi:10.1016/s0048-9697(02)00060-8

Cited by 69 publications

(55 citation statements)

References 64 publications

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“…The Scottish Highlands contain some of the least disturbed rivers in Europe (Gilvear et al, 2002), and the region experiences highly variable flow conditions and marked annual ranges in stream temperatures, though the effects on ecosystem functioning are poorly understood . Many Highland rivers are internationally important as spawning and rearing habitats for Atlantic salmon (Salmo salar): particularly the early "spring" running fish which are of great economic, cultural and conservation importance.…”

Section: Introductionmentioning

confidence: 99%

“…Many Highland rivers are internationally important as spawning and rearing habitats for Atlantic salmon (Salmo salar): particularly the early "spring" running fish which are of great economic, cultural and conservation importance. Salmon is often cited as a key higher order species and an indicator of wider ecosystem health, thus it is commonly a target species for instream flow studies aimed at providing an ecological basis for river management (Gibbins et al, 2002;Webb et al, 2002;Gordon et al, 2004;Moir et al, 2005). A number of Scottish salmon rivers are used for hydropower production and have regulated flow regimes that are only crudely relevant to the environmental requirements of salmon; and adverse impacts of flow regulation on salmon populations have been reported (Gilvear, 1994).…”

Section: Introductionmentioning

confidence: 99%

“…Understanding the hydrological and thermal requirements of Atlantic salmon at different life-stages is important for river management (Gilvear et al, 2002). Discharge influences in-stream hydraulics is thus one of the basic determinants of the amount of habitat space available in river systems for different life stages (Petts, 1980).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Variability in stream discharge and temperature: a preliminary assessment of the implications for juvenile and spawning Atlantic salmon

Tetzlaff

Soulsby

Youngson³

et al. 2005

Hydrol. Earth Syst. Sci.

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show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Variability in stream discharge and temperature: a preliminary assessment of the implications for juvenile and spawning Atlantic salmon

Tetzlaff

Soulsby

Youngson³

et al. 2005

Hydrol. Earth Syst. Sci.

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show abstract

“…L'amélioration de la qualité du lit mineur se marque par une meilleure diversité des substrats minéraux de différents diamètres, dont surtout les galets et les blocs, et la présence de supports ligneux qui créent une mosaïque d'habitats favorable aux organismes aquatiques. Tous ces élé-ments sont des facteurs contribuant à une bonne qualité écologique des systèmes fluviaux (Gilvear et al, 2002). En effet, en intervenant sur la profondeur, la vitesse de courant et les substrats d'une rivière, on intervient sur le milieu physique dans lequel les organismes vivent.…”

Section: Reméandrationunclassified

Walphy, un projet expérimental de réhabilitation de cours d'eau : suivis hydromorphologiques et écologiques

et al. 2016

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Résumé -Le projet Life Environnement WALPHY, co-financé par l'Union Européenne, a eu pour objectif de réaliser des travaux de restauration de la qualité hydromorphologique du Bocq, affluent de la Meuse. La continuité longitudinale, qui concerne la libre circulation des poissons et le transport naturel des sédiments, a été fortement perturbée par un grand Mots-clés -restauration hydromorphologique, travaux de réhabilitation, suivis écologiques et hydromorphologiques, DCE Abstract -The Life Environment project WALPHY, co-funded by the European Union, aimed to improve hydromorphology of the Bocq catchment, a tributary of the Meuse. Longitudinal continuity, which concerns the free movement of fish and sediments, was strongly affected Hydroécol. Appl.

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“…Impacts may be due to changes in flow regimes (e.g. Minns et al, 1995;Gilvear et al, 2002), water temperature (e.g. McCarthy and Houlihan, 1996;Jensen, 2003), water quality (Winfield et al, 2004), predation (Gilvear et al, 2002), exploitation and management.…”

Section: Introductionmentioning

confidence: 99%

Implications of climate change on flow regime affecting Atlantic salmon

Walsh¹,

Kilsby²

2007

Hydrol. Earth Syst. Sci.

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The UKCIP02 climate change scenarios (20702100) suggest that the UK climate will become warmer (an overall increase of 2.53 o C), with temperature increases being greater in the summer and autumn than in the spring and winter seasons. In terms of precipitation, winters are expected to become wetter and summers drier throughout the UK. The effect of changes in the future climate on flow regimes are investigated for the Atlantic salmon, Salmo salar, in a case study in an upland UK river. Using a hydraulic modelling approach, flows simulated across the catchment are assessed in terms of hydraulic characteristics (discharge per metre width, flow depths, flow velocities and Froude number). These, compared with suitable characteristics published in the literature for various life stages of Atlantic salmon, enable assessment of habitat suitability. Climate change factors have been applied to meteorological observations in the Eden catchment (north-west England) and effects on the flow regime have been investigated using the SHETRAN hydrological modelling system. High flows are predicted to increase by up to 1.5%; yet, a greater impact is predicted from decreasing low flows (e.g. a Q 95 at the outlet of the study catchment may decrease to a Q 85 flow). Reliability, Resilience and Vulnerability (RRV) analysis provides a statistical indication of the extent and effect of such changes on flows. Results show that future climate will decrease the percentage time the ideal minimum physical habitat requirements will be met. In the case of suitable flow depth for spawning activity at the outlet of the catchment, the percentage time may decrease from 100% under current conditions to 94% in the future. Such changes will have implications for the species under the Habitats Directive and for catchment ecological flow management strategies.

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Hydrology and the ecological quality of Scottish river ecosystems

Cited by 69 publications

References 64 publications

Variability in stream discharge and temperature: a preliminary assessment of the implications for juvenile and spawning Atlantic salmon

Variability in stream discharge and temperature: a preliminary assessment of the implications for juvenile and spawning Atlantic salmon

Walphy, un projet expérimental de réhabilitation de cours d'eau : suivis hydromorphologiques et écologiques

Implications of climate change on flow regime affecting Atlantic salmon

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