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The impact of fine sediment accumulation on the survival of incubating salmon progeny: Implications for sediment management

The impact of fine sediment accumulation on the survival of incubating salmon progeny: Implications for sediment management
The impact of fine sediment accumulation on the survival of incubating salmon progeny: Implications for sediment management
This paper draws on results from a recent research programme on the impact of fine sediment transport through catchments to present a case for the development of new approaches to improving the quality of salmonid spawning and incubation habitats. To aid the development of these programmes, this paper summarises the mechanisms by which fine sediment accumulation influences the availability of oxygen (O2) to incubating salmon embryos. The results of the investigation indicate that incubation success is inhibited by: (i) the impact of fine sediment accumulation on gravel permeability and, subsequently, the rate of passage of oxygenated water through the incubation environment; (ii) reduced intragravel O2 concentrations that occur when O2 consuming material infiltrates spawning and incubation gravels; and (iii) the impact of fine particles (clay) on the exchange of O2 across the egg membrane. It is concluded that current granular measures of spawning and incubation habitat quality do not satisfactorily describe the complexity of factors influencing incubation success. Furthermore, an assessment of the trends in fine sediment infiltration indicates that only a small proportion of the total suspended sediment load infiltrates spawning and incubation gravels. This casts doubt over the ability of current catchment-based land use management strategies to adequately reduce fine sediment inputs.

fine sediment spawning gravels, oxygen supply, land use management
0048-9697
241-258
Greig, S.M.
9de52452-eae6-4223-9701-cf8693a43859
Sear, D.A.
ccd892ab-a93d-4073-a11c-b8bca42ecfd3
Carling, P.A.
8d252dd9-3c88-4803-81cc-c2ec4c6fa687
Greig, S.M.
9de52452-eae6-4223-9701-cf8693a43859
Sear, D.A.
ccd892ab-a93d-4073-a11c-b8bca42ecfd3
Carling, P.A.
8d252dd9-3c88-4803-81cc-c2ec4c6fa687

Greig, S.M., Sear, D.A. and Carling, P.A. (2005) The impact of fine sediment accumulation on the survival of incubating salmon progeny: Implications for sediment management. Science of Total Environment, 344 (1-3), 241-258. (doi:10.1016/j.scitotenv.2005.02.010).

Record type: Article

Abstract

This paper draws on results from a recent research programme on the impact of fine sediment transport through catchments to present a case for the development of new approaches to improving the quality of salmonid spawning and incubation habitats. To aid the development of these programmes, this paper summarises the mechanisms by which fine sediment accumulation influences the availability of oxygen (O2) to incubating salmon embryos. The results of the investigation indicate that incubation success is inhibited by: (i) the impact of fine sediment accumulation on gravel permeability and, subsequently, the rate of passage of oxygenated water through the incubation environment; (ii) reduced intragravel O2 concentrations that occur when O2 consuming material infiltrates spawning and incubation gravels; and (iii) the impact of fine particles (clay) on the exchange of O2 across the egg membrane. It is concluded that current granular measures of spawning and incubation habitat quality do not satisfactorily describe the complexity of factors influencing incubation success. Furthermore, an assessment of the trends in fine sediment infiltration indicates that only a small proportion of the total suspended sediment load infiltrates spawning and incubation gravels. This casts doubt over the ability of current catchment-based land use management strategies to adequately reduce fine sediment inputs.

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More information

Published date: 2005
Keywords: fine sediment spawning gravels, oxygen supply, land use management

Identifiers

Local EPrints ID: 17302
URI: https://eprints.soton.ac.uk/id/eprint/17302
ISSN: 0048-9697
PURE UUID: e656f5ad-564c-42ac-8e1c-f83df2d224d4
ORCID for D.A. Sear: ORCID iD orcid.org/0000-0003-0191-6179

Catalogue record

Date deposited: 19 Aug 2005
Last modified: 06 Jun 2018 13:07

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Contributors

Author: S.M. Greig
Author: D.A. Sear ORCID iD
Author: P.A. Carling

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