Hydropeaking affects germination and establishment of riverbank vegetation
Hydropeaking, defined as frequent and rapid variation in flow in regulated rivers with hydropower plants over a short period of time, usually sub-daily to weekly, alters hydraulic parameters such as water levels or flow velocity and exerts strong impacts on fluvial ecosystems. We evaluated the effec...
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ftzenodo:oai:zenodo.org:4970696 2023-06-06T11:57:54+02:00 Hydropeaking affects germination and establishment of riverbank vegetation Bejarano, María D. Sordo-Ward, Álvaro Alonso, Carlos Jansson, Roland Nilsson, Christer 2019-12-17 https://zenodo.org/record/4970696 https://doi.org/10.5061/dryad.sqv9s4n0m unknown https://zenodo.org/communities/dryad https://zenodo.org/record/4970696 https://doi.org/10.5061/dryad.sqv9s4n0m oai:zenodo.org:4970696 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode info:eu-repo/semantics/other dataset 2019 ftzenodo https://doi.org/10.5061/dryad.sqv9s4n0m 2023-04-13T21:06:05Z Hydropeaking, defined as frequent and rapid variation in flow in regulated rivers with hydropower plants over a short period of time, usually sub-daily to weekly, alters hydraulic parameters such as water levels or flow velocity and exerts strong impacts on fluvial ecosystems. We evaluated the effects of hydropeaking on riverbank vegetation, specifically assessing the germination and establishment of seedlings and cuttings of plant species representing a variation in traits. We used seeds and seedlings and cuttings varying in size as phytometers, and transplanted them to riverbanks both above and below dams used for hydropower production in northern Sweden, selected to represent a gradient in hydropeaking intensity, and along a free-flowing reach. We also analyzed sub-daily water level variables modified by hydropeaking to identify variables key in explaining the observed vegetation patterns. We found that plant responses to hydropeaking varied with species, with flood-intolerant species being the most strongly affected, as early as the germination stage. In contrast, seeds of flood-tolerant species managed to germinate and survive the early establishment phase, although strong erosive processes triggered by hydropeaking eventually caused most of them to fail. The fate of flood-intolerant species identifies germination as the most critical life-history stage. The depth and frequency of the inundation were the leading variables explaining plant responses, while the duration of shallow inundation explained little of the variation. The rise and fall rates of water levels were key explaining variation in germination success. Based on the results, we propose restoration measures to enhance establishment of riparian plant communities while minimizing the impact on hydropower electricity production. Given the strong decrease in the germination of species intolerant to prolonged flooding with hydropeaking, planting of seedlings, preferably of large sizes, together with restrictions in the operation of the power plant ... Dataset Northern Sweden Zenodo |
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Hydropeaking, defined as frequent and rapid variation in flow in regulated rivers with hydropower plants over a short period of time, usually sub-daily to weekly, alters hydraulic parameters such as water levels or flow velocity and exerts strong impacts on fluvial ecosystems. We evaluated the effects of hydropeaking on riverbank vegetation, specifically assessing the germination and establishment of seedlings and cuttings of plant species representing a variation in traits. We used seeds and seedlings and cuttings varying in size as phytometers, and transplanted them to riverbanks both above and below dams used for hydropower production in northern Sweden, selected to represent a gradient in hydropeaking intensity, and along a free-flowing reach. We also analyzed sub-daily water level variables modified by hydropeaking to identify variables key in explaining the observed vegetation patterns. We found that plant responses to hydropeaking varied with species, with flood-intolerant species being the most strongly affected, as early as the germination stage. In contrast, seeds of flood-tolerant species managed to germinate and survive the early establishment phase, although strong erosive processes triggered by hydropeaking eventually caused most of them to fail. The fate of flood-intolerant species identifies germination as the most critical life-history stage. The depth and frequency of the inundation were the leading variables explaining plant responses, while the duration of shallow inundation explained little of the variation. The rise and fall rates of water levels were key explaining variation in germination success. Based on the results, we propose restoration measures to enhance establishment of riparian plant communities while minimizing the impact on hydropower electricity production. Given the strong decrease in the germination of species intolerant to prolonged flooding with hydropeaking, planting of seedlings, preferably of large sizes, together with restrictions in the operation of the power plant ... |
format |
Dataset |
author |
Bejarano, María D. Sordo-Ward, Álvaro Alonso, Carlos Jansson, Roland Nilsson, Christer |
spellingShingle |
Bejarano, María D. Sordo-Ward, Álvaro Alonso, Carlos Jansson, Roland Nilsson, Christer Hydropeaking affects germination and establishment of riverbank vegetation |
author_facet |
Bejarano, María D. Sordo-Ward, Álvaro Alonso, Carlos Jansson, Roland Nilsson, Christer |
author_sort |
Bejarano, María D. |
title |
Hydropeaking affects germination and establishment of riverbank vegetation |
title_short |
Hydropeaking affects germination and establishment of riverbank vegetation |
title_full |
Hydropeaking affects germination and establishment of riverbank vegetation |
title_fullStr |
Hydropeaking affects germination and establishment of riverbank vegetation |
title_full_unstemmed |
Hydropeaking affects germination and establishment of riverbank vegetation |
title_sort |
hydropeaking affects germination and establishment of riverbank vegetation |
publishDate |
2019 |
url |
https://zenodo.org/record/4970696 https://doi.org/10.5061/dryad.sqv9s4n0m |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
https://zenodo.org/communities/dryad https://zenodo.org/record/4970696 https://doi.org/10.5061/dryad.sqv9s4n0m oai:zenodo.org:4970696 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.sqv9s4n0m |
_version_ |
1767966312448917504 |