Effects of both climate change and human water demand on a highly threatened damselfly

Abstract While climate change severely affects some aquatic ecosystems, it may also interact with anthropogenic factors and exacerbate their impact. In dry climates, dams can cause hydrological drought during dry periods following a great reduction in dam water discharge. However, impact of these se...

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Autores principales:	Rassim Khelifa, Hayat Mahdjoub, Affef Baaloudj, Robert A. Cannings, Michael J. Samways
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/30614f40533243ee9febb7d9c9a3a365
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spelling	oai:doaj.org-article:30614f40533243ee9febb7d9c9a3a3652021-12-02T14:26:57ZEffects of both climate change and human water demand on a highly threatened damselfly10.1038/s41598-021-86383-z2045-2322https://doaj.org/article/30614f40533243ee9febb7d9c9a3a3652021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86383-zhttps://doaj.org/toc/2045-2322Abstract While climate change severely affects some aquatic ecosystems, it may also interact with anthropogenic factors and exacerbate their impact. In dry climates, dams can cause hydrological drought during dry periods following a great reduction in dam water discharge. However, impact of these severe hydrological droughts on lotic fauna is poorly documented, despite climate change expected to increase drought duration and intensity. We document here how dam water discharge was affected by climate variability during 2011–2018 in a highly modified watershed in northeastern Algeria, and how an endemic endangered lotic damselfly, Calopteryx exul Selys, 1853 (Odonata: Calopterygidae), responded to hydrological drought episodes. Analysis was based on a compilation of data on climate (temperature, precipitation, and drought index), water dam management (water depth and discharge volume and frequency), survey data on C. exul occurrence, and capture–mark–recapture (CMR) of adults. The study period was characterized by a severe drought between 2014 and 2017, which led to a lowering of dam water depth and reduction of discharge into the river, with associated changes in water chemistry, particularly during 2017 and 2018. These events could have led to the extirpation of several populations of C. exul in the Seybouse River (Algeria). CMR surveys showed that the species was sensitive to water depth fluctuations, avoiding low and high water levels (drought and flooding). The study shows that climate change interacts with human water requirements and affects river flow regimes, water chemistry and aquatic fauna. As drought events are likely to increase in the future, the current study highlights the need for urgent new management plans for lotic habitats to maintain this species and possible others.Rassim KhelifaHayat MahdjoubAffef BaaloudjRobert A. CanningsMichael J. SamwaysNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rassim Khelifa Hayat Mahdjoub Affef Baaloudj Robert A. Cannings Michael J. Samways Effects of both climate change and human water demand on a highly threatened damselfly
description	Abstract While climate change severely affects some aquatic ecosystems, it may also interact with anthropogenic factors and exacerbate their impact. In dry climates, dams can cause hydrological drought during dry periods following a great reduction in dam water discharge. However, impact of these severe hydrological droughts on lotic fauna is poorly documented, despite climate change expected to increase drought duration and intensity. We document here how dam water discharge was affected by climate variability during 2011–2018 in a highly modified watershed in northeastern Algeria, and how an endemic endangered lotic damselfly, Calopteryx exul Selys, 1853 (Odonata: Calopterygidae), responded to hydrological drought episodes. Analysis was based on a compilation of data on climate (temperature, precipitation, and drought index), water dam management (water depth and discharge volume and frequency), survey data on C. exul occurrence, and capture–mark–recapture (CMR) of adults. The study period was characterized by a severe drought between 2014 and 2017, which led to a lowering of dam water depth and reduction of discharge into the river, with associated changes in water chemistry, particularly during 2017 and 2018. These events could have led to the extirpation of several populations of C. exul in the Seybouse River (Algeria). CMR surveys showed that the species was sensitive to water depth fluctuations, avoiding low and high water levels (drought and flooding). The study shows that climate change interacts with human water requirements and affects river flow regimes, water chemistry and aquatic fauna. As drought events are likely to increase in the future, the current study highlights the need for urgent new management plans for lotic habitats to maintain this species and possible others.
format	article
author	Rassim Khelifa Hayat Mahdjoub Affef Baaloudj Robert A. Cannings Michael J. Samways
author_facet	Rassim Khelifa Hayat Mahdjoub Affef Baaloudj Robert A. Cannings Michael J. Samways
author_sort	Rassim Khelifa
title	Effects of both climate change and human water demand on a highly threatened damselfly
title_short	Effects of both climate change and human water demand on a highly threatened damselfly
title_full	Effects of both climate change and human water demand on a highly threatened damselfly
title_fullStr	Effects of both climate change and human water demand on a highly threatened damselfly
title_full_unstemmed	Effects of both climate change and human water demand on a highly threatened damselfly
title_sort	effects of both climate change and human water demand on a highly threatened damselfly
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/30614f40533243ee9febb7d9c9a3a365
work_keys_str_mv	AT rassimkhelifa effectsofbothclimatechangeandhumanwaterdemandonahighlythreateneddamselfly AT hayatmahdjoub effectsofbothclimatechangeandhumanwaterdemandonahighlythreateneddamselfly AT affefbaaloudj effectsofbothclimatechangeandhumanwaterdemandonahighlythreateneddamselfly AT robertacannings effectsofbothclimatechangeandhumanwaterdemandonahighlythreateneddamselfly AT michaeljsamways effectsofbothclimatechangeandhumanwaterdemandonahighlythreateneddamselfly
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Effects of both climate change and human water demand on a highly threatened damselfly

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