DataSheet1_When the Eel Meets Dams: Larger Dams’ Long-Term Impacts on Anguilla anguilla (L., 1758).docx
Diadromous fish, like the European eel Anguilla anguilla (L., 1758), are highly threatened by dams that disrupt river connectivity, consequently impeding fish movements to reach feeding and spawning habitats. In this study, variation in eel occurrence between a historical period (1940–1970) and rece...
Main Authors: | , , , |
---|---|
Format: | Dataset |
Language: | unknown |
Published: |
2022
|
Subjects: | |
Online Access: | https://doi.org/10.3389/fenvs.2022.876369.s001 https://figshare.com/articles/dataset/DataSheet1_When_the_Eel_Meets_Dams_Larger_Dams_Long-Term_Impacts_on_Anguilla_anguilla_L_1758_docx/20327991 |
id |
ftfrontimediafig:oai:figshare.com:article/20327991 |
---|---|
record_format |
openpolar |
spelling |
ftfrontimediafig:oai:figshare.com:article/20327991 2023-05-15T13:27:23+02:00 DataSheet1_When the Eel Meets Dams: Larger Dams’ Long-Term Impacts on Anguilla anguilla (L., 1758).docx Cinzia Podda Francesco Palmas Antonio Pusceddu Andrea Sabatini 2022-07-18T04:15:56Z https://doi.org/10.3389/fenvs.2022.876369.s001 https://figshare.com/articles/dataset/DataSheet1_When_the_Eel_Meets_Dams_Larger_Dams_Long-Term_Impacts_on_Anguilla_anguilla_L_1758_docx/20327991 unknown doi:10.3389/fenvs.2022.876369.s001 https://figshare.com/articles/dataset/DataSheet1_When_the_Eel_Meets_Dams_Larger_Dams_Long-Term_Impacts_on_Anguilla_anguilla_L_1758_docx/20327991 CC BY 4.0 CC-BY Environmental Science Climate Science Environmental Impact Assessment Environmental Management Soil Biology Water Treatment Processes Environmental Engineering Design Environmental Engineering Modelling Environmental Technologies Diadromous species European eel freshwater ecosystems damming river fragmentation Dataset 2022 ftfrontimediafig https://doi.org/10.3389/fenvs.2022.876369.s001 2022-07-20T23:05:44Z Diadromous fish, like the European eel Anguilla anguilla (L., 1758), are highly threatened by dams that disrupt river connectivity, consequently impeding fish movements to reach feeding and spawning habitats. In this study, variation in eel occurrence between a historical period (1940–1970) and recent data (2016–2020) was assessed throughout the Sardinian rivers’ network (more than 450 sites). Using Boosted Regression Trees (BRT) we investigated relationships between eel’s occurrence and a set of spatial and temporal environmental variables including a set of dams’ construction features for each period. An overall decrease by 65% of eel’s occurrence was noticed during the ca. 80-years period under scrutiny. Considering a subset (105 and 88 sites for the historical and the recent period, respectively) characterized by the presence of larger dams (height >15 m), eel’s occurrence dropped by 85%. Conversely, eel’s occurrence dropped only by ca. 44% in dam-free sites. During the historical period, eel’s occurrence was mostly affected by time since the initial habitat fragmentation, flow, distance to dams, connectivity, and dams’ height. In the most recent period, eel’s occurrence is mostly affected by dams’ building year, dam-to-sea distance, and, again, dams’ height. Results pinpoint that dams’ construction features and the time from their construction have significant negative effects on eel’s occurrence. Addition of future effective eel restoration practices, apart any other adverse environmental stressor, must consider dams’ removal, wherever socially sustainable or alternatively, the modification of construction features of dams (like excessive height) and the addition of fish ladders. Dataset Anguilla anguilla European eel Frontiers: Figshare |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Environmental Science Climate Science Environmental Impact Assessment Environmental Management Soil Biology Water Treatment Processes Environmental Engineering Design Environmental Engineering Modelling Environmental Technologies Diadromous species European eel freshwater ecosystems damming river fragmentation |
spellingShingle |
Environmental Science Climate Science Environmental Impact Assessment Environmental Management Soil Biology Water Treatment Processes Environmental Engineering Design Environmental Engineering Modelling Environmental Technologies Diadromous species European eel freshwater ecosystems damming river fragmentation Cinzia Podda Francesco Palmas Antonio Pusceddu Andrea Sabatini DataSheet1_When the Eel Meets Dams: Larger Dams’ Long-Term Impacts on Anguilla anguilla (L., 1758).docx |
topic_facet |
Environmental Science Climate Science Environmental Impact Assessment Environmental Management Soil Biology Water Treatment Processes Environmental Engineering Design Environmental Engineering Modelling Environmental Technologies Diadromous species European eel freshwater ecosystems damming river fragmentation |
description |
Diadromous fish, like the European eel Anguilla anguilla (L., 1758), are highly threatened by dams that disrupt river connectivity, consequently impeding fish movements to reach feeding and spawning habitats. In this study, variation in eel occurrence between a historical period (1940–1970) and recent data (2016–2020) was assessed throughout the Sardinian rivers’ network (more than 450 sites). Using Boosted Regression Trees (BRT) we investigated relationships between eel’s occurrence and a set of spatial and temporal environmental variables including a set of dams’ construction features for each period. An overall decrease by 65% of eel’s occurrence was noticed during the ca. 80-years period under scrutiny. Considering a subset (105 and 88 sites for the historical and the recent period, respectively) characterized by the presence of larger dams (height >15 m), eel’s occurrence dropped by 85%. Conversely, eel’s occurrence dropped only by ca. 44% in dam-free sites. During the historical period, eel’s occurrence was mostly affected by time since the initial habitat fragmentation, flow, distance to dams, connectivity, and dams’ height. In the most recent period, eel’s occurrence is mostly affected by dams’ building year, dam-to-sea distance, and, again, dams’ height. Results pinpoint that dams’ construction features and the time from their construction have significant negative effects on eel’s occurrence. Addition of future effective eel restoration practices, apart any other adverse environmental stressor, must consider dams’ removal, wherever socially sustainable or alternatively, the modification of construction features of dams (like excessive height) and the addition of fish ladders. |
format |
Dataset |
author |
Cinzia Podda Francesco Palmas Antonio Pusceddu Andrea Sabatini |
author_facet |
Cinzia Podda Francesco Palmas Antonio Pusceddu Andrea Sabatini |
author_sort |
Cinzia Podda |
title |
DataSheet1_When the Eel Meets Dams: Larger Dams’ Long-Term Impacts on Anguilla anguilla (L., 1758).docx |
title_short |
DataSheet1_When the Eel Meets Dams: Larger Dams’ Long-Term Impacts on Anguilla anguilla (L., 1758).docx |
title_full |
DataSheet1_When the Eel Meets Dams: Larger Dams’ Long-Term Impacts on Anguilla anguilla (L., 1758).docx |
title_fullStr |
DataSheet1_When the Eel Meets Dams: Larger Dams’ Long-Term Impacts on Anguilla anguilla (L., 1758).docx |
title_full_unstemmed |
DataSheet1_When the Eel Meets Dams: Larger Dams’ Long-Term Impacts on Anguilla anguilla (L., 1758).docx |
title_sort |
datasheet1_when the eel meets dams: larger dams’ long-term impacts on anguilla anguilla (l., 1758).docx |
publishDate |
2022 |
url |
https://doi.org/10.3389/fenvs.2022.876369.s001 https://figshare.com/articles/dataset/DataSheet1_When_the_Eel_Meets_Dams_Larger_Dams_Long-Term_Impacts_on_Anguilla_anguilla_L_1758_docx/20327991 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_relation |
doi:10.3389/fenvs.2022.876369.s001 https://figshare.com/articles/dataset/DataSheet1_When_the_Eel_Meets_Dams_Larger_Dams_Long-Term_Impacts_on_Anguilla_anguilla_L_1758_docx/20327991 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fenvs.2022.876369.s001 |
_version_ |
1766398152432156672 |