Water quality index including periphyton chlorophyll-a in forested urban watersheds from Tierra del Fuego (Argentina)

The city of Ushuaia, Argentina, has experienced a rapid and unorganized population growth with possible consequences on the dynamics and functioning of urban lotic ecosystems. Urban expansion was not largely accompanied by the development of infrastructure for the provision of services such as drink...

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Autores principales:	María Granitto, Soledad Diodato, Patricia Rodríguez
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Urbanization Lotic ecosystem Water quality index Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/d7e07e3b90754939b920fe238fe2063a
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spelling	oai:doaj.org-article:d7e07e3b90754939b920fe238fe2063a2021-12-01T04:49:30ZWater quality index including periphyton chlorophyll-a in forested urban watersheds from Tierra del Fuego (Argentina)1470-160X10.1016/j.ecolind.2021.107614https://doaj.org/article/d7e07e3b90754939b920fe238fe2063a2021-07-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X2100279Xhttps://doaj.org/toc/1470-160XThe city of Ushuaia, Argentina, has experienced a rapid and unorganized population growth with possible consequences on the dynamics and functioning of urban lotic ecosystems. Urban expansion was not largely accompanied by the development of infrastructure for the provision of services such as drinking water and sewers to all the population. Currently, only 65% of the population is connected to the main sewage system (pre-treatment) and the city does not have a secondary wastewater treatment plant yet. We evaluated the impact of wastewater discharges and non-point contamination on the water quality of the three main water courses that cross the city of Ushuaia: Pipo river (PR), Buena Esperanza stream (BES) and Arroyo Grande river (AGR). We sampled four sites per watershed from spring to autumn in two consecutive years (2018 and 2019): S1 (not urbanized at the upper section), S2 (transitional section), S3 (urbanized at the middle-low section), and S4 (urbanized, close to the outlet). We developed the Fuegian Water Quality Index (F_WQI) as a tool for environmental monitoring in forest streams which includes several indicators of organic inputs (dissolved oxygen, nitrogen-ammonium, total phosphorus, fecal coliform bacteria) and periphyton chlorophyll-a (Peri Chl-a). The variables were ranked and weighed, and the index was constructed using a mathematical formula. Urbanization negatively impacted the water quality of these ecosystems; the F_WQI showed “very bad” and “bad” water quality categories at S4 in BES and AGR, both sites impacted by wastewater discharges and large percentage of urbanized area. Likewise, in the PR watershed, with less urbanization and sewage discharges, the F_WQI indicated “very good” water quality. The F_WQI summarizes the water quality of forested watersheds in a simple numerical scale, resulting in a useful tool for monitoring studies in temperate rivers and streams. We encourage the inclusion of Peri Chl-a in water quality indices, due to its ubiquity in these ecosystems and the fact that it increased the sensitivity of the index.María GranittoSoledad DiodatoPatricia RodríguezElsevierarticleUrbanizationLotic ecosystemWater quality indexEcologyQH540-549.5ENEcological Indicators, Vol 126, Iss , Pp 107614- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Urbanization Lotic ecosystem Water quality index Ecology QH540-549.5
spellingShingle	Urbanization Lotic ecosystem Water quality index Ecology QH540-549.5 María Granitto Soledad Diodato Patricia Rodríguez Water quality index including periphyton chlorophyll-a in forested urban watersheds from Tierra del Fuego (Argentina)
description	The city of Ushuaia, Argentina, has experienced a rapid and unorganized population growth with possible consequences on the dynamics and functioning of urban lotic ecosystems. Urban expansion was not largely accompanied by the development of infrastructure for the provision of services such as drinking water and sewers to all the population. Currently, only 65% of the population is connected to the main sewage system (pre-treatment) and the city does not have a secondary wastewater treatment plant yet. We evaluated the impact of wastewater discharges and non-point contamination on the water quality of the three main water courses that cross the city of Ushuaia: Pipo river (PR), Buena Esperanza stream (BES) and Arroyo Grande river (AGR). We sampled four sites per watershed from spring to autumn in two consecutive years (2018 and 2019): S1 (not urbanized at the upper section), S2 (transitional section), S3 (urbanized at the middle-low section), and S4 (urbanized, close to the outlet). We developed the Fuegian Water Quality Index (F_WQI) as a tool for environmental monitoring in forest streams which includes several indicators of organic inputs (dissolved oxygen, nitrogen-ammonium, total phosphorus, fecal coliform bacteria) and periphyton chlorophyll-a (Peri Chl-a). The variables were ranked and weighed, and the index was constructed using a mathematical formula. Urbanization negatively impacted the water quality of these ecosystems; the F_WQI showed “very bad” and “bad” water quality categories at S4 in BES and AGR, both sites impacted by wastewater discharges and large percentage of urbanized area. Likewise, in the PR watershed, with less urbanization and sewage discharges, the F_WQI indicated “very good” water quality. The F_WQI summarizes the water quality of forested watersheds in a simple numerical scale, resulting in a useful tool for monitoring studies in temperate rivers and streams. We encourage the inclusion of Peri Chl-a in water quality indices, due to its ubiquity in these ecosystems and the fact that it increased the sensitivity of the index.
format	article
author	María Granitto Soledad Diodato Patricia Rodríguez
author_facet	María Granitto Soledad Diodato Patricia Rodríguez
author_sort	María Granitto
title	Water quality index including periphyton chlorophyll-a in forested urban watersheds from Tierra del Fuego (Argentina)
title_short	Water quality index including periphyton chlorophyll-a in forested urban watersheds from Tierra del Fuego (Argentina)
title_full	Water quality index including periphyton chlorophyll-a in forested urban watersheds from Tierra del Fuego (Argentina)
title_fullStr	Water quality index including periphyton chlorophyll-a in forested urban watersheds from Tierra del Fuego (Argentina)
title_full_unstemmed	Water quality index including periphyton chlorophyll-a in forested urban watersheds from Tierra del Fuego (Argentina)
title_sort	water quality index including periphyton chlorophyll-a in forested urban watersheds from tierra del fuego (argentina)
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d7e07e3b90754939b920fe238fe2063a
work_keys_str_mv	AT mariagranitto waterqualityindexincludingperiphytonchlorophyllainforestedurbanwatershedsfromtierradelfuegoargentina AT soledaddiodato waterqualityindexincludingperiphytonchlorophyllainforestedurbanwatershedsfromtierradelfuegoargentina AT patriciarodriguez waterqualityindexincludingperiphytonchlorophyllainforestedurbanwatershedsfromtierradelfuegoargentina
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Water quality index including periphyton chlorophyll-a in forested urban watersheds from Tierra del Fuego (Argentina)

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