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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ftdoajarticles:oai:doaj.org/article:06254dc8be8e4048811b6a16f4fe6604 2023-05-15T15:32:53+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 2020-05-01T00:00:00Z https://doi.org/10.3390/w12051352 https://doaj.org/article/06254dc8be8e4048811b6a16f4fe6604 EN eng MDPI AG https://www.mdpi.com/2073-4441/12/5/1352 https://doaj.org/toc/2073-4441 doi:10.3390/w12051352 2073-4441 https://doaj.org/article/06254dc8be8e4048811b6a16f4fe6604 Water, Vol 12, Iss 1352, p 1352 (2020) least-cost modeling longitudinal connectivity dissolved oxygen historical data functional distance migratory fish Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 article 2020 ftdoajarticles https://doi.org/10.3390/w12051352 2022-12-31T01:07:44Z 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. Article in Journal/Newspaper Atlantic salmon Directory of Open Access Journals: DOAJ Articles Water 12 5 1352 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
least-cost modeling longitudinal connectivity dissolved oxygen historical data functional distance migratory fish Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 |
spellingShingle |
least-cost modeling longitudinal connectivity dissolved oxygen historical data functional distance migratory fish Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 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 Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 |
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 |
Article in Journal/Newspaper |
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 |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/w12051352 https://doaj.org/article/06254dc8be8e4048811b6a16f4fe6604 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Water, Vol 12, Iss 1352, p 1352 (2020) |
op_relation |
https://www.mdpi.com/2073-4441/12/5/1352 https://doaj.org/toc/2073-4441 doi:10.3390/w12051352 2073-4441 https://doaj.org/article/06254dc8be8e4048811b6a16f4fe6604 |
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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1766363360040845312 |