Journal article
The influence of particle size and mineralogy on both phosphorus retention and release by streambed sediments
Journal of Soils and Sediments, Vol.19(5), pp.2624-2633
2019
Abstract
Purpose: In many streams worldwide including those on the south coast of Western Australia (WA), sediments of the > 2-mm fraction often contribute up to 50% of the streambed. However, most analysis and interpretation of sediment chemistry, including phosphorus (P), is conducted on the < 2-mm fraction as this fraction is considered the most chemically reactive. This paper aims to identify the contribution of the > 2-mm fraction to P retention and release in sandy-gravely streams.
Material and methods: Sediment samples were collected from streams in agricultural catchments, and P retention and release by the < 2-mm and > 2-mm (typically lateritic; iron rich) sediment fractions were examined using fluvarium and batch experiments. Phosphorus sorbed by sediment was estimated on a mass (mg P kg −1 ) and area basis (mg P m −2 ).
Results and discussion: Phosphorus sorption measurements suggested that mineralogy as well as particle size were important factors influencing P retention by stream sediments. Stream sediments retained approximately 30% of added P. In a desorption phase, approximately 8% of the retained P was released into stream water.
Conclusions: Stream sediments in south western WA appear to be net immobilisers of P, retaining more P than they release, dependent on the stream P concentration. Exclusion of the > 2-mm fraction when determining stream sediment P dynamics may therefore underestimate whole stream sediment P retention and release.
Details
- Title
- The influence of particle size and mineralogy on both phosphorus retention and release by streambed sediments
- Authors/Creators
- S.D.V. Clarendon (Author/Creator)D.M. Weaver (Author/Creator)P.M. Davies (Author/Creator)N.A. Coles (Author/Creator)
- Publication Details
- Journal of Soils and Sediments, Vol.19(5), pp.2624-2633
- Publisher
- Springer Verlag
- Identifiers
- 991005543341707891
- Copyright
- © 2019 Springer-Verlag GmbH Germany
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Metrics
16 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.45 Soil Science
- 3.45.473 Soil Phosphorus Dynamics
- Web Of Science research areas
- Environmental Sciences
- Soil Science
- ESI research areas
- Agricultural Sciences