Long-Term Eutrophication and Dynamics of Bloom-Forming Microbial Communities during Summer HAB in Large Arctic Lake
Harmful algal blooms (HABs) in arctic lakes are recent phenomena. In our study, we performed a long-term analysis (1990–2017) of the eutrophication of Lake Imandra, a large subarctic lake, and explored the biodiversity of bloom-forming microorganisms of a 2017 summer HAB. We performed a 16Sr rRNA me...
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ftmdpi:oai:mdpi.com:/2076-3298/8/8/82/ 2023-08-20T04:04:06+02:00 Long-Term Eutrophication and Dynamics of Bloom-Forming Microbial Communities during Summer HAB in Large Arctic Lake Nikolay Kashulin Tatiana Kashulina Alexander Bekkelund agris 2021-08-17 application/pdf https://doi.org/10.3390/environments8080082 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/environments8080082 https://creativecommons.org/licenses/by/4.0/ Environments; Volume 8; Issue 8; Pages: 82 HABs 16S rRNA metabarcoding microbiota analysis arctic lakes eutrophication critical nutrient loads diatom–diazotroph associations Text 2021 ftmdpi https://doi.org/10.3390/environments8080082 2023-08-01T02:27:33Z Harmful algal blooms (HABs) in arctic lakes are recent phenomena. In our study, we performed a long-term analysis (1990–2017) of the eutrophication of Lake Imandra, a large subarctic lake, and explored the biodiversity of bloom-forming microorganisms of a 2017 summer HAB. We performed a 16Sr rRNA metabarcoding study of microbial communities, analysed the associations between N, P, C, and chlorophyll concentrations in the lake water, and developed models for the prediction of HABs based on total P concentration. We have demonstrated that blooms in Lake Imandra occur outside of optimal Redfield ratios and have a nonlinear association with P concentrations. We found that recent summer HABs in a lake occur as simultaneous blooms of a diatom Aulacoseira sp. and cyanobacteria Dolichospermum sp. We have studied the temporal dynamics of microbial communities during the bloom and performed an analysis of the publicly available Dolichospermum genomes to outline potential genetic mechanisms beneath simultaneous blooming. We found genetic traits requisite for diatom-diazotroph associations, which may lay beneath the simultaneous blooming of Aulacoseira sp. and Dolichospermum sp. in Lake Imandra. Both groups of organisms have the ability to store nutrients and form a dormant stage. All of these factors will ensure the further development of the HABs in Lake Imandra and the dispersal of these bloom-forming species to neighboring lakes. Text Arctic Subarctic MDPI Open Access Publishing Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Imandra ENVELOPE(33.260,33.260,67.849,67.849) Environments 8 8 82 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
HABs 16S rRNA metabarcoding microbiota analysis arctic lakes eutrophication critical nutrient loads diatom–diazotroph associations |
spellingShingle |
HABs 16S rRNA metabarcoding microbiota analysis arctic lakes eutrophication critical nutrient loads diatom–diazotroph associations Nikolay Kashulin Tatiana Kashulina Alexander Bekkelund Long-Term Eutrophication and Dynamics of Bloom-Forming Microbial Communities during Summer HAB in Large Arctic Lake |
topic_facet |
HABs 16S rRNA metabarcoding microbiota analysis arctic lakes eutrophication critical nutrient loads diatom–diazotroph associations |
description |
Harmful algal blooms (HABs) in arctic lakes are recent phenomena. In our study, we performed a long-term analysis (1990–2017) of the eutrophication of Lake Imandra, a large subarctic lake, and explored the biodiversity of bloom-forming microorganisms of a 2017 summer HAB. We performed a 16Sr rRNA metabarcoding study of microbial communities, analysed the associations between N, P, C, and chlorophyll concentrations in the lake water, and developed models for the prediction of HABs based on total P concentration. We have demonstrated that blooms in Lake Imandra occur outside of optimal Redfield ratios and have a nonlinear association with P concentrations. We found that recent summer HABs in a lake occur as simultaneous blooms of a diatom Aulacoseira sp. and cyanobacteria Dolichospermum sp. We have studied the temporal dynamics of microbial communities during the bloom and performed an analysis of the publicly available Dolichospermum genomes to outline potential genetic mechanisms beneath simultaneous blooming. We found genetic traits requisite for diatom-diazotroph associations, which may lay beneath the simultaneous blooming of Aulacoseira sp. and Dolichospermum sp. in Lake Imandra. Both groups of organisms have the ability to store nutrients and form a dormant stage. All of these factors will ensure the further development of the HABs in Lake Imandra and the dispersal of these bloom-forming species to neighboring lakes. |
format |
Text |
author |
Nikolay Kashulin Tatiana Kashulina Alexander Bekkelund |
author_facet |
Nikolay Kashulin Tatiana Kashulina Alexander Bekkelund |
author_sort |
Nikolay Kashulin |
title |
Long-Term Eutrophication and Dynamics of Bloom-Forming Microbial Communities during Summer HAB in Large Arctic Lake |
title_short |
Long-Term Eutrophication and Dynamics of Bloom-Forming Microbial Communities during Summer HAB in Large Arctic Lake |
title_full |
Long-Term Eutrophication and Dynamics of Bloom-Forming Microbial Communities during Summer HAB in Large Arctic Lake |
title_fullStr |
Long-Term Eutrophication and Dynamics of Bloom-Forming Microbial Communities during Summer HAB in Large Arctic Lake |
title_full_unstemmed |
Long-Term Eutrophication and Dynamics of Bloom-Forming Microbial Communities during Summer HAB in Large Arctic Lake |
title_sort |
long-term eutrophication and dynamics of bloom-forming microbial communities during summer hab in large arctic lake |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/environments8080082 |
op_coverage |
agris |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) ENVELOPE(33.260,33.260,67.849,67.849) |
geographic |
Arctic Arctic Lake Imandra |
geographic_facet |
Arctic Arctic Lake Imandra |
genre |
Arctic Subarctic |
genre_facet |
Arctic Subarctic |
op_source |
Environments; Volume 8; Issue 8; Pages: 82 |
op_relation |
https://dx.doi.org/10.3390/environments8080082 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/environments8080082 |
container_title |
Environments |
container_volume |
8 |
container_issue |
8 |
container_start_page |
82 |
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1774714527240159232 |