Effects of suspended sediments from reservoir flushing on fish and macroinvertebrates in an alpine stream

Crosa, Giuseppe; Castelli, E; Gentili, Gaetano; Espa, Paolo

doi:10.1007/s00027-009-0117-z

Cited by 95 publications

(81 citation statements)

References 23 publications

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“…It can be supposed that more frequent flushing operations will be carried out, determining stronger physical impacts on the downstream aquatic communities (e.g. [14,109]). As regard granulometry, coarser sediments are expected to accumulate into reservoirs, thus potentially diluting contaminant concentrations; on the other hand, stronger weathering, soil erosion and permafrost reduction may increase trace element fluxes into reservoirs, increasing concentrations in sediments.…”

Section: Management Directionsmentioning

confidence: 99%

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Marziali¹,

Tartari²,

Salerno³

et al. 2017

Preprint

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Abstract:Reservoirs are characterized by accumulation of sediments where micropollutants may concentrate, with potential toxic effects on downstream river ecosystems. However, sediment management such as flushing is needed to maintain storage capacity. Climate change is expected to increase sediment loads, but potential effects on their quality are scarcely known. In this context, sediment contamination by trace elements (As, Cd, Cr, Cu, Hg, Ni, Pb, Zn) and organics (PAHs, PCBs, C>12) was analyzed in 20 reservoirs located in Italian Central Alps. A strong As and a moderate Cd, Hg and Pb enrichment was emphasized by Igeo, with potential ecotoxicological risk according to PEC quotients. Sedimentation rate, granulometry, total organic carbon (TOC) and altitude resulted as the main drivers governing pollutant concentrations in sediments. According to climate change models, expected increase of rainfall erosivity will enhance soil erosion and consequently the sediment flow to reservoirs, potentially increasing coarse grain fractions and thus potentially diluting pollutants. Conversely, increased weathering may enhance metal fluxes to reservoirs. Increased vegetation cover will potentially result in higher TOC concentrations, which may contrast contaminant bioavailability and thus toxicity. Our results may provide elements for a proper management of contaminated sediments in a climate change scenario aiming at preserving water quality and ecosystem functioning.

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Section: Management Directionsmentioning

confidence: 99%

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Marziali¹,

Tartari²,

Salerno³

et al. 2017

Preprint

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“…The consequences on the biocenosis of successive flushings, equivalent to a ramp disturbance (i.e. a disturbance increasing steadily over time) (Lake, 2000), have been well documented (Crosa et al, 2010;Reno¨fa¨lt et al, 2010, and references herein). However, the specific impact of rapid lowering of the water level and temporary drying of riverine habitats of rivers and reservoirs on their macro-invertebrate communities has received scant attention (Walker et al, 1992).…”

Section: Introductionmentioning

confidence: 97%

Response of bivalve populations to drying disturbance and life history traits of twoPisidiumspecies (Bivalvia: Sphaeriidae) in a reservoir of the French Upper Rhone river

Mouthon¹

2011

Ann. Limnol. - Int. J. Lim.

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-The dam reservoirs of the Upper Rhone were drained every three years until 2003, and the water level of the Villebois reservoir was lowered by 1.5 m. This resulted in considerable drying of its littoral habitats and the disappearance of the abundant macro-invertebrates that live in them. This study investigates the response to this drying disturbance of bivalve populations and especially of the life history traits of the two potamic species, Pisidium moitessierianum and Pisidium supinum. The low density of these bivalves observed during the months following the drying of May 2003May until spring 2004 shows that the contribution of drift in population recovery was very limited during this period. Due to the faster turnover of its cohorts and a higher increase in litter size in 2004, P. moitessierianum once again dominated bivalve communities from 2005 onwards. In the Villebois reservoir recovery of bivalve communities in terms of structure and density was total three years after the drying of 2003. Observations suggest an increase in litter size and continuous recruitment: the reproductive strategy adopted by these bivalves represent response to the fall in numbers on the one hand, and to considerable magnitudes of temperature and flow rates on the other hand, enabling the rapid adjustment of populations to drying disturbance and variations in environmental conditions. Taking into account the response of bivalve populations to this event, its effects are comparable to those of a supra-seasonal drought (Lake, 2003, Freshw. Biol., 48, 1161-1172.

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“…Kt is the ratio between reservoir storage and mean annual sediment yield. A ratio of 100 means that the mean annual sediment yield can be stored over 100 years until the reservoir is filled (without flushing) loss of benthic invertebrates, reduced growth, and lost habitats due to sedimentation (Henley et al 2000;Crosa et al 2009;Kemp et al 2011;Jones et al 2012).…”

Section: )mentioning

confidence: 99%

Riverine Ecosystem Management

Schmutz¹,

Sendzimir²

2018

129

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Open Access This book is licensed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author (s) and the source, provide a link to the Creative Commons license and indicate if changes were made. The images or other third party material in this book are included in the book's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the book's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Printed on acid-free paperThis Springer imprint is published by the registered company Springer International Publishing AG part of Springer Nature. The registered company address is: Gewerbestrasse 11, 6330 Cham, Switzerland Challenges in Riverine Ecosystem Management Jan Sendzimir and Stefan SchmutzThis book is dedicated to those interested in the natural and social sciences and elements of governance that will support the sustainable management of rivers and aquatic ecosystems. Since elements of nature and society interact to determine the integrity and trajectory of these systems, they are referred to hereafter as socialecological systems (SESs). This introduction opens the door to these topics in four steps. It begins by explaining why a book dedicated to river management and science is needed at this point. In the second part, it outlines the history of some of the major developments that challenge the integrity of SESs worldwide. In the third part, it describes several of the principal tools used to study as well as manage SES. Tools to measure the degree of degradation of an SES include indicators of biological integrity, ecosystem health, and resilience. Tools to assess and manage the trajectory of an SES include the DPSIR and adaptive management. The introduction closes by outlining the structure of the book through the progression of its chapters. Justification of BookRivers are among the most threatened ecosystems of the world. For more than a centur...

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Effects of suspended sediments from reservoir flushing on fish and macroinvertebrates in an alpine stream

Cited by 95 publications

References 23 publications

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Response of bivalve populations to drying disturbance and life history traits of twoPisidiumspecies (Bivalvia: Sphaeriidae) in a reservoir of the French Upper Rhone river

Riverine Ecosystem Management

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