Indicators of hydro-ecological alteration for the rivers of the United States

Recent decades have produced a river of field data linking hydrologic alteration to fish populations in hundreds of U.S. river systems. Adverse impact thresholds and relationships between flow alteration and fish populations are key for advancing environmental flow conservation and environmental flo...

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Autores principales:	Robert George, Ryan McManamay, Denielle Perry, John Sabo, Benjamin L. Ruddell
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Environmental flows Ecohydrology Streamflow alteration Flow ecology relationships River management Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/d2548014e96b4500bd4c101ca1fb654f
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spelling	oai:doaj.org-article:d2548014e96b4500bd4c101ca1fb654f2021-12-01T04:28:51ZIndicators of hydro-ecological alteration for the rivers of the United States1470-160X10.1016/j.ecolind.2020.106908https://doaj.org/article/d2548014e96b4500bd4c101ca1fb654f2021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20308475https://doaj.org/toc/1470-160XRecent decades have produced a river of field data linking hydrologic alteration to fish populations in hundreds of U.S. river systems. Adverse impact thresholds and relationships between flow alteration and fish populations are key for advancing environmental flow conservation and environmental flow regulations in U.S. waterways. Prior work has established relationships in individual rivers and fine scale basins, but not for large basins or at national scale. As a first step toward establishing consistent fish-flow relationships and adverse impact thresholds in every US waterway, we analyze a nation-wide aggregated dataset from McManamay et al., 2017 containing co-located estimates of altered hydrologic metrics (HMs) for flow and native fish richness. In each medium sized river system (HUC4) we (1) identify the hydrologic metrics that most powerfully explain observed impacts on native fish richness, (2) estimate an adverse resource impact threshold defining excessive flow alteration, and (3) attribute the main causes of observed flow alteration. Strong empirical relationships between hydrologic metrics and native fish richness are thus established for most HUC4 basins in the continental U.S., and can be used as guidelines for science-based management. However, the findings underline a major aquatic ecology data gap in the western U.S. where a lack of statistically adequate field observations currently prevent clear results, and this gap will hinder science-based management of those river basins until it is filled.Robert GeorgeRyan McManamayDenielle PerryJohn SaboBenjamin L. RuddellElsevierarticleEnvironmental flowsEcohydrologyStreamflow alterationFlow ecology relationshipsRiver managementEcologyQH540-549.5ENEcological Indicators, Vol 120, Iss , Pp 106908- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental flows Ecohydrology Streamflow alteration Flow ecology relationships River management Ecology QH540-549.5
spellingShingle	Environmental flows Ecohydrology Streamflow alteration Flow ecology relationships River management Ecology QH540-549.5 Robert George Ryan McManamay Denielle Perry John Sabo Benjamin L. Ruddell Indicators of hydro-ecological alteration for the rivers of the United States
description	Recent decades have produced a river of field data linking hydrologic alteration to fish populations in hundreds of U.S. river systems. Adverse impact thresholds and relationships between flow alteration and fish populations are key for advancing environmental flow conservation and environmental flow regulations in U.S. waterways. Prior work has established relationships in individual rivers and fine scale basins, but not for large basins or at national scale. As a first step toward establishing consistent fish-flow relationships and adverse impact thresholds in every US waterway, we analyze a nation-wide aggregated dataset from McManamay et al., 2017 containing co-located estimates of altered hydrologic metrics (HMs) for flow and native fish richness. In each medium sized river system (HUC4) we (1) identify the hydrologic metrics that most powerfully explain observed impacts on native fish richness, (2) estimate an adverse resource impact threshold defining excessive flow alteration, and (3) attribute the main causes of observed flow alteration. Strong empirical relationships between hydrologic metrics and native fish richness are thus established for most HUC4 basins in the continental U.S., and can be used as guidelines for science-based management. However, the findings underline a major aquatic ecology data gap in the western U.S. where a lack of statistically adequate field observations currently prevent clear results, and this gap will hinder science-based management of those river basins until it is filled.
format	article
author	Robert George Ryan McManamay Denielle Perry John Sabo Benjamin L. Ruddell
author_facet	Robert George Ryan McManamay Denielle Perry John Sabo Benjamin L. Ruddell
author_sort	Robert George
title	Indicators of hydro-ecological alteration for the rivers of the United States
title_short	Indicators of hydro-ecological alteration for the rivers of the United States
title_full	Indicators of hydro-ecological alteration for the rivers of the United States
title_fullStr	Indicators of hydro-ecological alteration for the rivers of the United States
title_full_unstemmed	Indicators of hydro-ecological alteration for the rivers of the United States
title_sort	indicators of hydro-ecological alteration for the rivers of the united states
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d2548014e96b4500bd4c101ca1fb654f
work_keys_str_mv	AT robertgeorge indicatorsofhydroecologicalalterationfortheriversoftheunitedstates AT ryanmcmanamay indicatorsofhydroecologicalalterationfortheriversoftheunitedstates AT denielleperry indicatorsofhydroecologicalalterationfortheriversoftheunitedstates AT johnsabo indicatorsofhydroecologicalalterationfortheriversoftheunitedstates AT benjaminlruddell indicatorsofhydroecologicalalterationfortheriversoftheunitedstates
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Indicators of hydro-ecological alteration for the rivers of the United States

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