The influence of canalisation on juvenile salmonid habitat

K.J. Millidine, I.A. Malcolm, C.N. Gibbins, R.J. Fryer, A. F. Youngson

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

There have been few mechanistic studies linking local ecological characteristics of streams to morphological pressures. This paper reports the findings of an investigation of the impacts of canalisation on salmonidhabitat. Habitat use by Atlantic salmon and brown trout, fry and parr was assessed using Generalised Additive Models (GAMs) based on seasonal electrofishing survey data and output from 2-dimensional hydraulic models. By overlaying the habitat models onto the physical characteristics of the canalised reach, it was possible to determine where and when environmental bottlenecks occurred, and for which species and life stages. The canalised reach was characterised by relatively uniform sedimentary and hydraulic characteristics compared to other reaches. Although it was generally well suited to fry, the lack of coarser substrate and low velocity areas during winter made the canalised reach unfavourable for salmon and trout parr respectively. Given the insights provided by this study, we suggest the approach of combining physical channel characterisation with locally derived seasonal habitat models is well suited to future research focussed on assessing the ecological impact of morphological pressures.
Original languageEnglish
Pages (from-to)262-273
Number of pages12
JournalEcological Indicators
Volume23
Early online date28 Apr 2012
DOIs
Publication statusPublished - Dec 2012

Fingerprint

parr
salmonid
fish fry
fluid mechanics
habitat
habitats
physical models
Salmo trutta
hydraulics
Salmo salar
electrofishing
ecological impact
habitat use
winter
substrate
Habitat
Salmon

Keywords

  • salmonid
  • hydromorphology
  • habitat
  • canalisation
  • hydraulic models
  • seasonal
  • general additive models
  • agricultural

Cite this

Millidine, K. J., Malcolm, I. A., Gibbins, C. N., Fryer, R. J., & Youngson, A. F. (2012). The influence of canalisation on juvenile salmonid habitat. Ecological Indicators, 23, 262-273. https://doi.org/10.1016/j.ecolind.2012.04.004

The influence of canalisation on juvenile salmonid habitat. / Millidine, K.J.; Malcolm, I.A.; Gibbins, C.N.; Fryer, R.J.; Youngson, A. F.

In: Ecological Indicators, Vol. 23, 12.2012, p. 262-273.

Research output: Contribution to journalArticle

Millidine, KJ, Malcolm, IA, Gibbins, CN, Fryer, RJ & Youngson, AF 2012, 'The influence of canalisation on juvenile salmonid habitat', Ecological Indicators, vol. 23, pp. 262-273. https://doi.org/10.1016/j.ecolind.2012.04.004
Millidine KJ, Malcolm IA, Gibbins CN, Fryer RJ, Youngson AF. The influence of canalisation on juvenile salmonid habitat. Ecological Indicators. 2012 Dec;23:262-273. https://doi.org/10.1016/j.ecolind.2012.04.004
Millidine, K.J. ; Malcolm, I.A. ; Gibbins, C.N. ; Fryer, R.J. ; Youngson, A. F. / The influence of canalisation on juvenile salmonid habitat. In: Ecological Indicators. 2012 ; Vol. 23. pp. 262-273.
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