URRENT STATE OF THE ECOSYSTEM OF LAKE UROZERO, KARELIA, ASSESSED THROUGH PRIMARY PRODUCTION AND DESTRUCTION INDICATORS
Lake Urozero has the status of a regional-level state hydrological nature monument in the Republic of Karelia. Up until the mid-2000’s, the lake have been noted for very high water transparency and the ultra-oligotrophic state of the ecosystem. In 2018, the prima-ry production and destruction charac...
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ftdoajarticles:oai:doaj.org/article:75d550aae7d54eefb2b59e186280afa7 2023-05-15T18:06:29+02:00 URRENT STATE OF THE ECOSYSTEM OF LAKE UROZERO, KARELIA, ASSESSED THROUGH PRIMARY PRODUCTION AND DESTRUCTION INDICATORS Elena Tekanova 2019-05-01T00:00:00Z https://doi.org/10.17076/eco980 https://doaj.org/article/75d550aae7d54eefb2b59e186280afa7 EN RU eng rus Karelian Research Centre of the Russian Academy of Sciences http://journals.krc.karelia.ru/index.php/ecology/article/view/980 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/eco980 https://doaj.org/article/75d550aae7d54eefb2b59e186280afa7 Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Iss 5 (2019) water body hydrological monument chlorophyll a phytoplankton photo-synthesis organic matter destruction trophic state Science Q article 2019 ftdoajarticles https://doi.org/10.17076/eco980 2022-12-31T11:04:59Z Lake Urozero has the status of a regional-level state hydrological nature monument in the Republic of Karelia. Up until the mid-2000’s, the lake have been noted for very high water transparency and the ultra-oligotrophic state of the ecosystem. In 2018, the prima-ry production and destruction characteristics of the Urozero ecosystem were studied as integral indicators of the current state and direction of its functioning. Such assessments are necessitated by the modified climatic conditions in Karelia, which affect catchments. These changes result in enlarged flow of allochtonous organic matter to water bodies. The values of photosynthesis (average 22 μg C/l per day), chlorophyll a(average 1.6 μg/l), daily assimilation number (on average 21 μg C/μg Chl), P/B factor (average 1.2 days-1) and water transparency (average 9.8 m) were measured in May, July and September. These measurements confirm that the lake ecosystem has retained its ultra-oligotrophic state. In spring and summer, when solar radiation is excessive and water transparency is high, the vertical distribution of chlorophyll ashowed a pattern unusual for Karelia, with maximum values found at the depth of one transparency. The change in the values of or-ganic matter destruction down the water column corresponds to the vertical dynamics of chlorophyll a. This vertical distribution of the values of destruction, as well as the con-sistently high transparency of the lake water, indicates that allochtonous organic mat-ter does not affect the water ecosystem. The natural ecological state of Lake Urozero in the current circumstances of climate change in the catchment area and human pres-sure is retained owing to the absence of surface inflows and nature conservation mea-sures to counteract pollution. Article in Journal/Newspaper Republic of Karelia Directory of Open Access Journals: DOAJ Articles Proceedings of the Karelian Research Centre of the Russian Academy of Sciences 5 83 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Russian |
topic |
water body hydrological monument chlorophyll a phytoplankton photo-synthesis organic matter destruction trophic state Science Q |
spellingShingle |
water body hydrological monument chlorophyll a phytoplankton photo-synthesis organic matter destruction trophic state Science Q Elena Tekanova URRENT STATE OF THE ECOSYSTEM OF LAKE UROZERO, KARELIA, ASSESSED THROUGH PRIMARY PRODUCTION AND DESTRUCTION INDICATORS |
topic_facet |
water body hydrological monument chlorophyll a phytoplankton photo-synthesis organic matter destruction trophic state Science Q |
description |
Lake Urozero has the status of a regional-level state hydrological nature monument in the Republic of Karelia. Up until the mid-2000’s, the lake have been noted for very high water transparency and the ultra-oligotrophic state of the ecosystem. In 2018, the prima-ry production and destruction characteristics of the Urozero ecosystem were studied as integral indicators of the current state and direction of its functioning. Such assessments are necessitated by the modified climatic conditions in Karelia, which affect catchments. These changes result in enlarged flow of allochtonous organic matter to water bodies. The values of photosynthesis (average 22 μg C/l per day), chlorophyll a(average 1.6 μg/l), daily assimilation number (on average 21 μg C/μg Chl), P/B factor (average 1.2 days-1) and water transparency (average 9.8 m) were measured in May, July and September. These measurements confirm that the lake ecosystem has retained its ultra-oligotrophic state. In spring and summer, when solar radiation is excessive and water transparency is high, the vertical distribution of chlorophyll ashowed a pattern unusual for Karelia, with maximum values found at the depth of one transparency. The change in the values of or-ganic matter destruction down the water column corresponds to the vertical dynamics of chlorophyll a. This vertical distribution of the values of destruction, as well as the con-sistently high transparency of the lake water, indicates that allochtonous organic mat-ter does not affect the water ecosystem. The natural ecological state of Lake Urozero in the current circumstances of climate change in the catchment area and human pres-sure is retained owing to the absence of surface inflows and nature conservation mea-sures to counteract pollution. |
format |
Article in Journal/Newspaper |
author |
Elena Tekanova |
author_facet |
Elena Tekanova |
author_sort |
Elena Tekanova |
title |
URRENT STATE OF THE ECOSYSTEM OF LAKE UROZERO, KARELIA, ASSESSED THROUGH PRIMARY PRODUCTION AND DESTRUCTION INDICATORS |
title_short |
URRENT STATE OF THE ECOSYSTEM OF LAKE UROZERO, KARELIA, ASSESSED THROUGH PRIMARY PRODUCTION AND DESTRUCTION INDICATORS |
title_full |
URRENT STATE OF THE ECOSYSTEM OF LAKE UROZERO, KARELIA, ASSESSED THROUGH PRIMARY PRODUCTION AND DESTRUCTION INDICATORS |
title_fullStr |
URRENT STATE OF THE ECOSYSTEM OF LAKE UROZERO, KARELIA, ASSESSED THROUGH PRIMARY PRODUCTION AND DESTRUCTION INDICATORS |
title_full_unstemmed |
URRENT STATE OF THE ECOSYSTEM OF LAKE UROZERO, KARELIA, ASSESSED THROUGH PRIMARY PRODUCTION AND DESTRUCTION INDICATORS |
title_sort |
urrent state of the ecosystem of lake urozero, karelia, assessed through primary production and destruction indicators |
publisher |
Karelian Research Centre of the Russian Academy of Sciences |
publishDate |
2019 |
url |
https://doi.org/10.17076/eco980 https://doaj.org/article/75d550aae7d54eefb2b59e186280afa7 |
genre |
Republic of Karelia |
genre_facet |
Republic of Karelia |
op_source |
Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Iss 5 (2019) |
op_relation |
http://journals.krc.karelia.ru/index.php/ecology/article/view/980 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/eco980 https://doaj.org/article/75d550aae7d54eefb2b59e186280afa7 |
op_doi |
https://doi.org/10.17076/eco980 |
container_title |
Proceedings of the Karelian Research Centre of the Russian Academy of Sciences |
container_issue |
5 |
container_start_page |
83 |
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1766178115442180096 |