Hydropower: gas supersaturation and the role of aquatic plant photosynthesis for fish health
Fish and invertebrates breathing in water supersaturated with gas (total dissolved gas; TDG), e.g. at the outlet of hydropower plants, may develop gas bubble disease (analogous to the bends in humans). Aquatic plants also influence the gas saturation, and here we quantified to what extent the mass d...
Main Authors: | , , , , , , , |
---|---|
Format: | Report |
Language: | English |
Published: |
Norsk institutt for vannforskning
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/11250/2760314 |
id |
ftnorce:oai:norceresearch.brage.unit.no:11250/2760314 |
---|---|
record_format |
openpolar |
spelling |
ftnorce:oai:norceresearch.brage.unit.no:11250/2760314 2023-05-15T15:32:28+02:00 Hydropower: gas supersaturation and the role of aquatic plant photosynthesis for fish health Demars, Benoît Olivier Laurent Dörsch, Peter Thiemer, Kirstine Clayer, Francois Schneider, Susanne Claudia Stranzl, Sebastian Franz Pulg, Ulrich Velle, Gaute 2021 application/pdf https://hdl.handle.net/11250/2760314 eng eng Norsk institutt for vannforskning NIVA-rapport urn:isbn:978-82-577-7369-4 https://hdl.handle.net/11250/2760314 cristin:1913112 7633 23 Vannplanter Aquatic macrophytes Fotosyntese Photosynthesis Gassovermetning Gas supersaturation Fisk Fish VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 Research report 2021 ftnorce 2022-10-13T05:50:38Z Fish and invertebrates breathing in water supersaturated with gas (total dissolved gas; TDG), e.g. at the outlet of hydropower plants, may develop gas bubble disease (analogous to the bends in humans). Aquatic plants also influence the gas saturation, and here we quantified to what extent the mass development of an aquatic plant (Juncus bulbosus) downstream Brokke hydropower plant in southern Norway could increase TDG and the risk for aquatic animal health. We found that J. bulbosus mass development could account for up to 5 % extra TDG supersaturation through photosynthesis, that is 105 % TDG saturation on its own. We can expect chronic health issues and acute mortality for fish and invertebrates if the added gas saturation causes the TDG supersaturation to increase to levels above a species’ tolerance, which is 110 % for acute mortality of Atlantic salmon (Salmo salar) in surface waters. Since TDG is reduced by about 10 % per meter water depth, fish may escape harmful supersaturation by moving deeper. However, the photosynthesis peak in gas saturation corresponds to surface feeding time of salmonids, so further studies in fish behaviour are required. publishedVersion Report Atlantic salmon Salmo salar NORCE vitenarkiv (Norwegian Research Centre) Norway |
institution |
Open Polar |
collection |
NORCE vitenarkiv (Norwegian Research Centre) |
op_collection_id |
ftnorce |
language |
English |
topic |
Vannplanter Aquatic macrophytes Fotosyntese Photosynthesis Gassovermetning Gas supersaturation Fisk Fish VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 |
spellingShingle |
Vannplanter Aquatic macrophytes Fotosyntese Photosynthesis Gassovermetning Gas supersaturation Fisk Fish VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 Demars, Benoît Olivier Laurent Dörsch, Peter Thiemer, Kirstine Clayer, Francois Schneider, Susanne Claudia Stranzl, Sebastian Franz Pulg, Ulrich Velle, Gaute Hydropower: gas supersaturation and the role of aquatic plant photosynthesis for fish health |
topic_facet |
Vannplanter Aquatic macrophytes Fotosyntese Photosynthesis Gassovermetning Gas supersaturation Fisk Fish VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 |
description |
Fish and invertebrates breathing in water supersaturated with gas (total dissolved gas; TDG), e.g. at the outlet of hydropower plants, may develop gas bubble disease (analogous to the bends in humans). Aquatic plants also influence the gas saturation, and here we quantified to what extent the mass development of an aquatic plant (Juncus bulbosus) downstream Brokke hydropower plant in southern Norway could increase TDG and the risk for aquatic animal health. We found that J. bulbosus mass development could account for up to 5 % extra TDG supersaturation through photosynthesis, that is 105 % TDG saturation on its own. We can expect chronic health issues and acute mortality for fish and invertebrates if the added gas saturation causes the TDG supersaturation to increase to levels above a species’ tolerance, which is 110 % for acute mortality of Atlantic salmon (Salmo salar) in surface waters. Since TDG is reduced by about 10 % per meter water depth, fish may escape harmful supersaturation by moving deeper. However, the photosynthesis peak in gas saturation corresponds to surface feeding time of salmonids, so further studies in fish behaviour are required. publishedVersion |
format |
Report |
author |
Demars, Benoît Olivier Laurent Dörsch, Peter Thiemer, Kirstine Clayer, Francois Schneider, Susanne Claudia Stranzl, Sebastian Franz Pulg, Ulrich Velle, Gaute |
author_facet |
Demars, Benoît Olivier Laurent Dörsch, Peter Thiemer, Kirstine Clayer, Francois Schneider, Susanne Claudia Stranzl, Sebastian Franz Pulg, Ulrich Velle, Gaute |
author_sort |
Demars, Benoît Olivier Laurent |
title |
Hydropower: gas supersaturation and the role of aquatic plant photosynthesis for fish health |
title_short |
Hydropower: gas supersaturation and the role of aquatic plant photosynthesis for fish health |
title_full |
Hydropower: gas supersaturation and the role of aquatic plant photosynthesis for fish health |
title_fullStr |
Hydropower: gas supersaturation and the role of aquatic plant photosynthesis for fish health |
title_full_unstemmed |
Hydropower: gas supersaturation and the role of aquatic plant photosynthesis for fish health |
title_sort |
hydropower: gas supersaturation and the role of aquatic plant photosynthesis for fish health |
publisher |
Norsk institutt for vannforskning |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2760314 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
7633 23 |
op_relation |
NIVA-rapport urn:isbn:978-82-577-7369-4 https://hdl.handle.net/11250/2760314 cristin:1913112 |
_version_ |
1766362959740665856 |