Anthropogenic and Climate-Exacerbated Landscape Disturbances Converge to Alter Phosphorus Bioavailability in an Oligotrophic River

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 (...

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Autores principales:	Caitlin Watt, Monica B. Emelko, Uldis Silins, Adrian L. Collins, Micheal Stone
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	cumulative effects fine sediment particulate phosphorus sediment geochemistry gravel-bed rivers forest disturbance Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/9040f06171e5481dbb291831da11eb53
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spelling	oai:doaj.org-article:9040f06171e5481dbb291831da11eb532021-11-25T19:14:48ZAnthropogenic and Climate-Exacerbated Landscape Disturbances Converge to Alter Phosphorus Bioavailability in an Oligotrophic River10.3390/w132231512073-4441https://doaj.org/article/9040f06171e5481dbb291831da11eb532021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/22/3151https://doaj.org/toc/2073-4441Cumulative 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 (Si<sub>2</sub>O, Al<sub>2</sub>O<sub>3</sub>, Fe<sub>2</sub>O<sub>3</sub>, MnO, CaO, MgO, Na<sub>2</sub>O, K<sub>2</sub>O, Ti<sub>2</sub>O, V<sub>2</sub>O<sub>5</sub>, P<sub>2</sub>O<sub>5</sub>), loss on ignition (LOI), PP fractions (NH<sub>4</sub>CI-RP, BD-RP, NaOH-RP, HCI-RP and NaOH(<sub>85</sub>)-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 Al<sub>2</sub>O<sub>3</sub> 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.Caitlin WattMonica B. EmelkoUldis SilinsAdrian L. CollinsMicheal StoneMDPI AGarticlecumulative effectsfine sedimentparticulate phosphorussediment geochemistrygravel-bed riversforest disturbanceHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3151, p 3151 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cumulative effects fine sediment particulate phosphorus sediment geochemistry gravel-bed rivers forest disturbance Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	cumulative effects fine sediment particulate phosphorus sediment geochemistry gravel-bed rivers forest disturbance Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Caitlin Watt Monica B. Emelko Uldis Silins Adrian L. Collins Micheal Stone Anthropogenic and Climate-Exacerbated Landscape Disturbances Converge to Alter Phosphorus Bioavailability in an Oligotrophic River
description	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 (Si<sub>2</sub>O, Al<sub>2</sub>O<sub>3</sub>, Fe<sub>2</sub>O<sub>3</sub>, MnO, CaO, MgO, Na<sub>2</sub>O, K<sub>2</sub>O, Ti<sub>2</sub>O, V<sub>2</sub>O<sub>5</sub>, P<sub>2</sub>O<sub>5</sub>), loss on ignition (LOI), PP fractions (NH<sub>4</sub>CI-RP, BD-RP, NaOH-RP, HCI-RP and NaOH(<sub>85</sub>)-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 Al<sub>2</sub>O<sub>3</sub> 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.
format	article
author	Caitlin Watt Monica B. Emelko Uldis Silins Adrian L. Collins Micheal Stone
author_facet	Caitlin Watt Monica B. Emelko Uldis Silins Adrian L. Collins Micheal Stone
author_sort	Caitlin Watt
title	Anthropogenic and Climate-Exacerbated Landscape Disturbances Converge to Alter Phosphorus Bioavailability in an Oligotrophic River
title_short	Anthropogenic and Climate-Exacerbated Landscape Disturbances Converge to Alter Phosphorus Bioavailability in an Oligotrophic River
title_full	Anthropogenic and Climate-Exacerbated Landscape Disturbances Converge to Alter Phosphorus Bioavailability in an Oligotrophic River
title_fullStr	Anthropogenic and Climate-Exacerbated Landscape Disturbances Converge to Alter Phosphorus Bioavailability in an Oligotrophic River
title_full_unstemmed	Anthropogenic and Climate-Exacerbated Landscape Disturbances Converge to Alter Phosphorus Bioavailability in an Oligotrophic River
title_sort	anthropogenic and climate-exacerbated landscape disturbances converge to alter phosphorus bioavailability in an oligotrophic river
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9040f06171e5481dbb291831da11eb53
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Anthropogenic and Climate-Exacerbated Landscape Disturbances Converge to Alter Phosphorus Bioavailability in an Oligotrophic River

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