Hypoxia Sustains Cyanobacteria Blooms in the Baltic Sea
(2014) In Environmental Science & Technology 48(5). p.2598-2602- Abstract
- Nutrient over-enrichment is one of the classic triggering mechanisms for the occurrence of cyanobacteria blooms in aquatic ecosystems. In the Baltic Sea, cyanobacteria regularly occur in the late summer months and form nuisance accumulations in surface waters and their abundance has intensified significantly in the past 50 years attributed to human-induced eutrophication. However, the natural occurrence of cyanobacteria during the Holocene is debated. In this study, we present records of cyanobacteria pigments, water column redox proxies, and nitrogen isotopic signatures for the past ca. 8000 years from Baltic Sea sediment cores. Our results demonstrate that cyanobacteria abundance and nitrogen fixation are correlated with hypoxia... (More)
- Nutrient over-enrichment is one of the classic triggering mechanisms for the occurrence of cyanobacteria blooms in aquatic ecosystems. In the Baltic Sea, cyanobacteria regularly occur in the late summer months and form nuisance accumulations in surface waters and their abundance has intensified significantly in the past 50 years attributed to human-induced eutrophication. However, the natural occurrence of cyanobacteria during the Holocene is debated. In this study, we present records of cyanobacteria pigments, water column redox proxies, and nitrogen isotopic signatures for the past ca. 8000 years from Baltic Sea sediment cores. Our results demonstrate that cyanobacteria abundance and nitrogen fixation are correlated with hypoxia occurring during three main intervals: (1) ca. 7000-4000 B.P. during the Littorina transgression, (2) ca. 1400-700 B.P. during the Medieval Climate Anomaly, and (3) from ca. 1950 A.D. to the present. Issues of preservation were investigated, and we show that organic matter and pigment profiles are not simply an artifact of preservation. These results suggest that cyanobacteria abundance is sustained during periods of hypoxia, most likely because of enhanced recycling of phosphorus in low oxygen conditions. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4414273
- author
- Funkey, Carolina LU ; Conley, Daniel LU ; Reuss, Nina S. ; Humborg, Christoph ; Jilbert, Tom and Slomp, Caroline P.
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Environmental Science & Technology
- volume
- 48
- issue
- 5
- pages
- 2598 - 2602
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:24512281
- wos:000332494200010
- scopus:84895550364
- pmid:24512281
- ISSN
- 1520-5851
- DOI
- 10.1021/es404395a
- language
- English
- LU publication?
- yes
- id
- c0c6e4aa-d07a-427c-a27c-edd9ddcbeea2 (old id 4414273)
- date added to LUP
- 2016-04-01 11:02:16
- date last changed
- 2022-04-28 03:42:04
@article{c0c6e4aa-d07a-427c-a27c-edd9ddcbeea2,
abstract = {{Nutrient over-enrichment is one of the classic triggering mechanisms for the occurrence of cyanobacteria blooms in aquatic ecosystems. In the Baltic Sea, cyanobacteria regularly occur in the late summer months and form nuisance accumulations in surface waters and their abundance has intensified significantly in the past 50 years attributed to human-induced eutrophication. However, the natural occurrence of cyanobacteria during the Holocene is debated. In this study, we present records of cyanobacteria pigments, water column redox proxies, and nitrogen isotopic signatures for the past ca. 8000 years from Baltic Sea sediment cores. Our results demonstrate that cyanobacteria abundance and nitrogen fixation are correlated with hypoxia occurring during three main intervals: (1) ca. 7000-4000 B.P. during the Littorina transgression, (2) ca. 1400-700 B.P. during the Medieval Climate Anomaly, and (3) from ca. 1950 A.D. to the present. Issues of preservation were investigated, and we show that organic matter and pigment profiles are not simply an artifact of preservation. These results suggest that cyanobacteria abundance is sustained during periods of hypoxia, most likely because of enhanced recycling of phosphorus in low oxygen conditions.}},
author = {{Funkey, Carolina and Conley, Daniel and Reuss, Nina S. and Humborg, Christoph and Jilbert, Tom and Slomp, Caroline P.}},
issn = {{1520-5851}},
language = {{eng}},
number = {{5}},
pages = {{2598--2602}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Environmental Science & Technology}},
title = {{Hypoxia Sustains Cyanobacteria Blooms in the Baltic Sea}},
url = {{http://dx.doi.org/10.1021/es404395a}},
doi = {{10.1021/es404395a}},
volume = {{48}},
year = {{2014}},
}