The rDNA Diversity, Interseasonal Dynamic, and Functional Role of Cyanobacteria <i>Synechococcus</i> in the Sub-Arctic White Sea
Planktonic unicellular cyanobacteria are the dominant biomass producers and carbon fixers in the global ocean ecosystem, but they are not abundant in polar seawater. The interseasonal dynamics of picocyanobacterial (PC) abundance, picophytoplankton primary production, and phylogenetic diversity of P...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-11-01
|
| Series: | Plants |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2223-7747/13/22/3153 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850226235616002048 |
|---|---|
| author | Tatiana A. Belevich Irina A. Milyutina Olga V. Vorob’eva Aleksey V. Troitsky |
| author_facet | Tatiana A. Belevich Irina A. Milyutina Olga V. Vorob’eva Aleksey V. Troitsky |
| author_sort | Tatiana A. Belevich |
| collection | DOAJ |
| description | Planktonic unicellular cyanobacteria are the dominant biomass producers and carbon fixers in the global ocean ecosystem, but they are not abundant in polar seawater. The interseasonal dynamics of picocyanobacterial (PC) abundance, picophytoplankton primary production, and phylogenetic diversity of PC <i>Synechococcus</i> were studied in the sub-Arctic White Sea. The PC abundance varied from 0.2–0.3 × 10<sup>6</sup> cells/L in February to 5.2–16.7 × 10<sup>6</sup> cells/L in July. Picophytoplankton primary production ranged from 0.22 mg C/m<sup>3</sup> per day in winter to 11.32 mg C/m<sup>3</sup> per day in summer. <i>Synechococcus</i> abundance positively correlated with water temperature and river discharge that increased in recent years in the White Sea. Phylogenetic analysis of the 16S rRNA gene and ITS region clone libraries from the White Sea and Barents Sea eDNA revealed picocyanobacterial sequences related to marine <i>Synechococcus</i> subclusters 5.1-I, 5.I-IV, 5.2, and 5.3. All <i>Synechococcus</i> S5.1-I were common in the White and Barents seas and were consistently present in the picophytoplankton composition throughout the year. <i>Synechococcus</i> S5.2 and S5.3 appear in the PC community in summer, suggesting their river origin, and <i>Synechococcus</i> S5.1-IV inhabits only the Barents Sea and was not detected in the White Sea. A unique <i>Synechococcus</i> phylotype was revealed. It is expected that the increase in the abundance of PC and their increasing role in ecosystem functioning, as well as the enrichment of the species composition with new phylotypes in the semi-enclosed sub-Arctic White Sea, which is vulnerable to the effects of climate change, will be characteristic of all Arctic seas in general. |
| format | Article |
| id | doaj-art-dc986d7da5464a45bb27bfd912c06d9d |
| institution | OA Journals |
| issn | 2223-7747 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj-art-dc986d7da5464a45bb27bfd912c06d9d2025-08-20T02:05:07ZengMDPI AGPlants2223-77472024-11-011322315310.3390/plants13223153The rDNA Diversity, Interseasonal Dynamic, and Functional Role of Cyanobacteria <i>Synechococcus</i> in the Sub-Arctic White SeaTatiana A. Belevich0Irina A. Milyutina1Olga V. Vorob’eva2Aleksey V. Troitsky3Biological Faculty, Lomonosov Moscow State University, 119234 Moscow, RussiaBelozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, RussiaBiological Faculty, Lomonosov Moscow State University, 119234 Moscow, RussiaBelozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, RussiaPlanktonic unicellular cyanobacteria are the dominant biomass producers and carbon fixers in the global ocean ecosystem, but they are not abundant in polar seawater. The interseasonal dynamics of picocyanobacterial (PC) abundance, picophytoplankton primary production, and phylogenetic diversity of PC <i>Synechococcus</i> were studied in the sub-Arctic White Sea. The PC abundance varied from 0.2–0.3 × 10<sup>6</sup> cells/L in February to 5.2–16.7 × 10<sup>6</sup> cells/L in July. Picophytoplankton primary production ranged from 0.22 mg C/m<sup>3</sup> per day in winter to 11.32 mg C/m<sup>3</sup> per day in summer. <i>Synechococcus</i> abundance positively correlated with water temperature and river discharge that increased in recent years in the White Sea. Phylogenetic analysis of the 16S rRNA gene and ITS region clone libraries from the White Sea and Barents Sea eDNA revealed picocyanobacterial sequences related to marine <i>Synechococcus</i> subclusters 5.1-I, 5.I-IV, 5.2, and 5.3. All <i>Synechococcus</i> S5.1-I were common in the White and Barents seas and were consistently present in the picophytoplankton composition throughout the year. <i>Synechococcus</i> S5.2 and S5.3 appear in the PC community in summer, suggesting their river origin, and <i>Synechococcus</i> S5.1-IV inhabits only the Barents Sea and was not detected in the White Sea. A unique <i>Synechococcus</i> phylotype was revealed. It is expected that the increase in the abundance of PC and their increasing role in ecosystem functioning, as well as the enrichment of the species composition with new phylotypes in the semi-enclosed sub-Arctic White Sea, which is vulnerable to the effects of climate change, will be characteristic of all Arctic seas in general.https://www.mdpi.com/2223-7747/13/22/3153<i>Synechococcus</i>cyanobacteriapicoplankton16S rRNAITS rDNAphylogeny |
| spellingShingle | Tatiana A. Belevich Irina A. Milyutina Olga V. Vorob’eva Aleksey V. Troitsky The rDNA Diversity, Interseasonal Dynamic, and Functional Role of Cyanobacteria <i>Synechococcus</i> in the Sub-Arctic White Sea Plants <i>Synechococcus</i> cyanobacteria picoplankton 16S rRNA ITS rDNA phylogeny |
| title | The rDNA Diversity, Interseasonal Dynamic, and Functional Role of Cyanobacteria <i>Synechococcus</i> in the Sub-Arctic White Sea |
| title_full | The rDNA Diversity, Interseasonal Dynamic, and Functional Role of Cyanobacteria <i>Synechococcus</i> in the Sub-Arctic White Sea |
| title_fullStr | The rDNA Diversity, Interseasonal Dynamic, and Functional Role of Cyanobacteria <i>Synechococcus</i> in the Sub-Arctic White Sea |
| title_full_unstemmed | The rDNA Diversity, Interseasonal Dynamic, and Functional Role of Cyanobacteria <i>Synechococcus</i> in the Sub-Arctic White Sea |
| title_short | The rDNA Diversity, Interseasonal Dynamic, and Functional Role of Cyanobacteria <i>Synechococcus</i> in the Sub-Arctic White Sea |
| title_sort | rdna diversity interseasonal dynamic and functional role of cyanobacteria i synechococcus i in the sub arctic white sea |
| topic | <i>Synechococcus</i> cyanobacteria picoplankton 16S rRNA ITS rDNA phylogeny |
| url | https://www.mdpi.com/2223-7747/13/22/3153 |
| work_keys_str_mv | AT tatianaabelevich therdnadiversityinterseasonaldynamicandfunctionalroleofcyanobacteriaisynechococcusiinthesubarcticwhitesea AT irinaamilyutina therdnadiversityinterseasonaldynamicandfunctionalroleofcyanobacteriaisynechococcusiinthesubarcticwhitesea AT olgavvorobeva therdnadiversityinterseasonaldynamicandfunctionalroleofcyanobacteriaisynechococcusiinthesubarcticwhitesea AT alekseyvtroitsky therdnadiversityinterseasonaldynamicandfunctionalroleofcyanobacteriaisynechococcusiinthesubarcticwhitesea AT tatianaabelevich rdnadiversityinterseasonaldynamicandfunctionalroleofcyanobacteriaisynechococcusiinthesubarcticwhitesea AT irinaamilyutina rdnadiversityinterseasonaldynamicandfunctionalroleofcyanobacteriaisynechococcusiinthesubarcticwhitesea AT olgavvorobeva rdnadiversityinterseasonaldynamicandfunctionalroleofcyanobacteriaisynechococcusiinthesubarcticwhitesea AT alekseyvtroitsky rdnadiversityinterseasonaldynamicandfunctionalroleofcyanobacteriaisynechococcusiinthesubarcticwhitesea |