Diversity of Bacteria in Lakes with Different Chlorophyll Content and Investigation of Their Respiratory Activity through a Long-Term Microcosm Experiment.
| Title: | Diversity of Bacteria in Lakes with Different Chlorophyll Content and Investigation of Their Respiratory Activity through a Long-Term Microcosm Experiment. |
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| Authors: | Karayanni, Hera, Macingo, Sofia C., Tolis, Vasilis, Alivertis, Dimitrios |
| Source: | Water (20734441); Mar2019, Vol. 11 Issue 3, p467-467, 1p |
| Subject Terms: | BACTERIAL communities, CHLOROPHYLL, MICROCOSM & macrocosm, BACTERIOPLANKTON, RESPIRATION |
| Abstract: | Bacterial community structure and metabolism are critical factors for ecosystem functioning since they affect remineralization of nutrients and carbon flow. We used Illumina sequencing of 16SrRNA V3-V4 regions to investigate whether bacterial assemblage composition differs between four samples from two lakes in the geographic region of Epirus (Greece) characterized by distinct oligotrophic to eutrophic/hypereutrophic conditions as revealed by chlorophyll-a values. We found high similarity (>60%) for bacterial assemblages recovered from the two lakes when eutrophic/hypereutrophic conditions prevailed. Distinct bacterial communities appeared in oligotrophic and mesotrophic waters. Low temperature was occasionally an important factor in shaping the bacterial community. In parallel, microcosm experiments were performed to estimate respiration rates of bacterioplankton at in situ temperature and under a 2 °C temperature increase scenario. Differently assembled communities were found to display similar rates except under hypereutrophic conditions when respiration increased significantly, leading to hypoxic conditions. Temperature increase did not affect respiration rates. Overall this study indicated a clear differentiation of bacterial communities between sites of different trophic state. However, different communities responded similarly under a specific range of chlorophyll-a values and resisted small scale temperature perturbations. Different results were found for hypereutrophic conditions and this has implications for ecosystems functioning, given the increasing occurrence of eutrophication events. [ABSTRACT FROM AUTHOR] |
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| Database: | Complementary Index |
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| Items | – Name: Title Label: Title Group: Ti Data: Diversity of Bacteria in Lakes with Different Chlorophyll Content and Investigation of Their Respiratory Activity through a Long-Term Microcosm Experiment. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Karayanni%2C+Hera%22">Karayanni, Hera</searchLink><br /><searchLink fieldCode="AR" term="%22Macingo%2C+Sofia+C%2E%22">Macingo, Sofia C.</searchLink><br /><searchLink fieldCode="AR" term="%22Tolis%2C+Vasilis%22">Tolis, Vasilis</searchLink><br /><searchLink fieldCode="AR" term="%22Alivertis%2C+Dimitrios%22">Alivertis, Dimitrios</searchLink> – Name: TitleSource Label: Source Group: Src Data: Water (20734441); Mar2019, Vol. 11 Issue 3, p467-467, 1p – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22BACTERIAL+communities%22">BACTERIAL communities</searchLink><br /><searchLink fieldCode="DE" term="%22CHLOROPHYLL%22">CHLOROPHYLL</searchLink><br /><searchLink fieldCode="DE" term="%22MICROCOSM+%26+macrocosm%22">MICROCOSM & macrocosm</searchLink><br /><searchLink fieldCode="DE" term="%22BACTERIOPLANKTON%22">BACTERIOPLANKTON</searchLink><br /><searchLink fieldCode="DE" term="%22RESPIRATION%22">RESPIRATION</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Bacterial community structure and metabolism are critical factors for ecosystem functioning since they affect remineralization of nutrients and carbon flow. We used Illumina sequencing of 16SrRNA V3-V4 regions to investigate whether bacterial assemblage composition differs between four samples from two lakes in the geographic region of Epirus (Greece) characterized by distinct oligotrophic to eutrophic/hypereutrophic conditions as revealed by chlorophyll-a values. We found high similarity (>60%) for bacterial assemblages recovered from the two lakes when eutrophic/hypereutrophic conditions prevailed. Distinct bacterial communities appeared in oligotrophic and mesotrophic waters. Low temperature was occasionally an important factor in shaping the bacterial community. In parallel, microcosm experiments were performed to estimate respiration rates of bacterioplankton at in situ temperature and under a 2 °C temperature increase scenario. Differently assembled communities were found to display similar rates except under hypereutrophic conditions when respiration increased significantly, leading to hypoxic conditions. Temperature increase did not affect respiration rates. Overall this study indicated a clear differentiation of bacterial communities between sites of different trophic state. However, different communities responded similarly under a specific range of chlorophyll-a values and resisted small scale temperature perturbations. Different results were found for hypereutrophic conditions and this has implications for ecosystems functioning, given the increasing occurrence of eutrophication events. [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Group: Ab Data: <i>Copyright of Water (20734441) is the property of MDPI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/w11030467 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: 467 Subjects: – SubjectFull: BACTERIAL communities Type: general – SubjectFull: CHLOROPHYLL Type: general – SubjectFull: MICROCOSM & macrocosm Type: general – SubjectFull: BACTERIOPLANKTON Type: general – SubjectFull: RESPIRATION Type: general Titles: – TitleFull: Diversity of Bacteria in Lakes with Different Chlorophyll Content and Investigation of Their Respiratory Activity through a Long-Term Microcosm Experiment. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Karayanni, Hera – PersonEntity: Name: NameFull: Macingo, Sofia C. – PersonEntity: Name: NameFull: Tolis, Vasilis – PersonEntity: Name: NameFull: Alivertis, Dimitrios IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 20734441 Numbering: – Type: volume Value: 11 – Type: issue Value: 3 Titles: – TitleFull: Water (20734441) Type: main |
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