Historical Changes in the Ecological Connectivity of the Seine River for Fish: A Focus on Physical and Chemical Barriers Since the Mid-19th Century
To understand the long-term fate of fish assemblages in the context of global change and to design efficient restoration measures in river management, it is essential to consider the historical component of these ecosystems. The human-impacted Seine River Basin is a relevant case that has experience...
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ftmdpi:oai:mdpi.com:/2073-4441/12/5/1352/ 2023-08-20T04:05:21+02:00 Historical Changes in the Ecological Connectivity of the Seine River for Fish: A Focus on Physical and Chemical Barriers Since the Mid-19th Century Céline Le Pichon Laurence Lestel Emeric Courson Marie-Line Merg Evelyne Tales Jérôme Belliard agris 2020-05-10 application/pdf https://doi.org/10.3390/w12051352 EN eng Multidisciplinary Digital Publishing Institute Water Quality and Contamination https://dx.doi.org/10.3390/w12051352 https://creativecommons.org/licenses/by/4.0/ Water; Volume 12; Issue 5; Pages: 1352 least-cost modeling longitudinal connectivity dissolved oxygen historical data functional distance migratory fish fish passes navigation weir Text 2020 ftmdpi https://doi.org/10.3390/w12051352 2023-07-31T23:28:54Z To understand the long-term fate of fish assemblages in the context of global change and to design efficient restoration measures in river management, it is essential to consider the historical component of these ecosystems. The human-impacted Seine River Basin is a relevant case that has experienced the extinction of diadromous fishes over the last two centuries and has recently witnessed the recolonization of some species. One key issue is to understand the historical evolution of habitat accessibility for these migratory species. Thanks to the unique availability of historical, mainly hand-written sources of multiple types (river engineering projects, navigation maps, paper-based databases on oxygen, etc.), we documented and integrated, in a geographic information system-based database, the changes to physical and chemical barriers in the Seine River from the sea to Paris for three time periods (1900s, 1970s, and 2010s). The potential impact of these changes on the runs of three migratory species that have different migratory behaviors—Atlantic salmon, allis shad, and sea lamprey—was evaluated by ecological connectivity modeling, using a least-cost approach that integrates distance, costs, and risks related to barriers. We found that accessibility was contrasted between species, emphasizing the crucial role of the migration type, period, and level of tolerance to low dissolved oxygen values. The highest disruption of ecological connectivity was visible in the 1970s, when the effects of large hypoxic areas were compounded by those of impassable navigation weirs (i.e., without fish passes). As the approach was able to reveal the relative contribution of physical and chemical barriers on overall functional connectivity, it may constitute a model work in assessing the functioning of large river ecosystems. Text Atlantic salmon MDPI Open Access Publishing Weir ENVELOPE(177.167,177.167,-84.983,-84.983) Water 12 5 1352 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
least-cost modeling longitudinal connectivity dissolved oxygen historical data functional distance migratory fish fish passes navigation weir |
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least-cost modeling longitudinal connectivity dissolved oxygen historical data functional distance migratory fish fish passes navigation weir Céline Le Pichon Laurence Lestel Emeric Courson Marie-Line Merg Evelyne Tales Jérôme Belliard Historical Changes in the Ecological Connectivity of the Seine River for Fish: A Focus on Physical and Chemical Barriers Since the Mid-19th Century |
topic_facet |
least-cost modeling longitudinal connectivity dissolved oxygen historical data functional distance migratory fish fish passes navigation weir |
description |
To understand the long-term fate of fish assemblages in the context of global change and to design efficient restoration measures in river management, it is essential to consider the historical component of these ecosystems. The human-impacted Seine River Basin is a relevant case that has experienced the extinction of diadromous fishes over the last two centuries and has recently witnessed the recolonization of some species. One key issue is to understand the historical evolution of habitat accessibility for these migratory species. Thanks to the unique availability of historical, mainly hand-written sources of multiple types (river engineering projects, navigation maps, paper-based databases on oxygen, etc.), we documented and integrated, in a geographic information system-based database, the changes to physical and chemical barriers in the Seine River from the sea to Paris for three time periods (1900s, 1970s, and 2010s). The potential impact of these changes on the runs of three migratory species that have different migratory behaviors—Atlantic salmon, allis shad, and sea lamprey—was evaluated by ecological connectivity modeling, using a least-cost approach that integrates distance, costs, and risks related to barriers. We found that accessibility was contrasted between species, emphasizing the crucial role of the migration type, period, and level of tolerance to low dissolved oxygen values. The highest disruption of ecological connectivity was visible in the 1970s, when the effects of large hypoxic areas were compounded by those of impassable navigation weirs (i.e., without fish passes). As the approach was able to reveal the relative contribution of physical and chemical barriers on overall functional connectivity, it may constitute a model work in assessing the functioning of large river ecosystems. |
format |
Text |
author |
Céline Le Pichon Laurence Lestel Emeric Courson Marie-Line Merg Evelyne Tales Jérôme Belliard |
author_facet |
Céline Le Pichon Laurence Lestel Emeric Courson Marie-Line Merg Evelyne Tales Jérôme Belliard |
author_sort |
Céline Le Pichon |
title |
Historical Changes in the Ecological Connectivity of the Seine River for Fish: A Focus on Physical and Chemical Barriers Since the Mid-19th Century |
title_short |
Historical Changes in the Ecological Connectivity of the Seine River for Fish: A Focus on Physical and Chemical Barriers Since the Mid-19th Century |
title_full |
Historical Changes in the Ecological Connectivity of the Seine River for Fish: A Focus on Physical and Chemical Barriers Since the Mid-19th Century |
title_fullStr |
Historical Changes in the Ecological Connectivity of the Seine River for Fish: A Focus on Physical and Chemical Barriers Since the Mid-19th Century |
title_full_unstemmed |
Historical Changes in the Ecological Connectivity of the Seine River for Fish: A Focus on Physical and Chemical Barriers Since the Mid-19th Century |
title_sort |
historical changes in the ecological connectivity of the seine river for fish: a focus on physical and chemical barriers since the mid-19th century |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/w12051352 |
op_coverage |
agris |
long_lat |
ENVELOPE(177.167,177.167,-84.983,-84.983) |
geographic |
Weir |
geographic_facet |
Weir |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Water; Volume 12; Issue 5; Pages: 1352 |
op_relation |
Water Quality and Contamination https://dx.doi.org/10.3390/w12051352 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w12051352 |
container_title |
Water |
container_volume |
12 |
container_issue |
5 |
container_start_page |
1352 |
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1774715854234058752 |