A - Papers appearing in refereed journals
Watt, C., Emelko, M. B., Silins, U., Collins, A. L. and Stone, M. 2021. Anthropogenic and Climate-Exacerbated Landscape Disturbances Converge to Alter Phosphorus Bioavailability in an Oligotrophic River. Water. 13 (22), p. 3151. https://doi.org/10.3390/w13223151
Authors | Watt, C., Emelko, M. B., Silins, U., Collins, A. L. and Stone, M. |
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Abstract | Cumulative effects of landscape disturbance in forested source water regions can alter the storage of fine sediment and associated phosphorus in riverbeds, shift nutrient dynamics and degrade water quality. Here, we examine longitudinal changes in major element chemistry and particulate phosphorus (PP) fractions of riverbed sediment in an oligotrophic river during environmentally sensitive low flow conditions. Study sites along 50 km of the Crowsnest River were located below tributary inflows from sub-watersheds and represent a gradient of increasing cumulative sediment pressures across a range of land disturbance types (harvesting, wildfire, and municipal wastewater discharges). Major elements (Si2O, Al2O3, Fe2O3, MnO, CaO, MgO, Na2O, K2O, Ti2O, V2O5, P2O5), loss on ignition (LOI), PP fractions (NH4CI-RP, BD-RP, NaOH-RP, HCI-RP and NaOH(85)-RP), and absolute particle size were evaluated for sediments collected in 2016 and 2017. While total PP concentrations were similar across all sites, bioavailable PP fractions (BD-RP, NaOH-RP) increased downstream with increased concentrations of Al2O3 and MnO and levels of landscape disturbance. This study highlights the longitudinal water quality impacts of increasing landscape disturbance on bioavailable PP in fine riverbed sediments and shows how the convergence of climate (wildfire) and anthropogenic (sewage effluent, harvesting, agriculture) drivers can produce legacy effects on nutrients. |
Keywords | Cumulative effects; Fine sediment; Particulate phosphorus; Sediment geochemistry; Gravel-bed rivers; Forest disturbance; Wildfire; Eutrophication; Climate change |
Year of Publication | 2021 |
Journal | Water |
Journal citation | 13 (22), p. 3151 |
Digital Object Identifier (DOI) | https://doi.org/10.3390/w13223151 |
Web address (URL) | https://doi.org/10.3390/w13223151 |
Open access | Published as ‘gold’ (paid) open access |
Funder | Biotechnology and Biological Sciences Research Council |
Funder project or code | Natural Sciences and Engineering Research Council of Canada - Discovery Grant |
Alberta Innovates Energy and Environment Solutions Grant AI-EES:2096 | |
Alberta Innovates BIO Grant AI-BIO: Bio-13-009 | |
forWater NSERC Network for Forested Drinking Water Source Protection Technologies | |
S2N - Soil to Nutrition - Work package 3 (WP3) - Sustainable intensification - optimisation at multiple scales | |
Publisher's version | |
Output status | Published |
Publication dates | |
Online | 09 Nov 2021 |
Publication process dates | |
Accepted | 05 Nov 2021 |
Publisher | MDPI |
ISSN | 2073-4441 |
Permalink - https://repository.rothamsted.ac.uk/item/98721/anthropogenic-and-climate-exacerbated-landscape-disturbances-converge-to-alter-phosphorus-bioavailability-in-an-oligotrophic-river