Seasonal variation in estuarine phytoplankton viability and its relationship with carbon dynamics in the Baltic Sea

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http://hdl.handle.net/10138/335737

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Elovaara, S., Degerlund, M., Franklin, D.J. et al. Seasonal variation in estuarine phytoplankton viability and its relationship with carbon dynamics in the Baltic Sea. Hydrobiologia 847, 2485–2501 (2020). https://doi.org/10.1007/s10750-020-04267-1

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Title: Seasonal variation in estuarine phytoplankton viability and its relationship with carbon dynamics in the Baltic Sea
Author: Elovaara, Samu; Degerlund, Maria; Franklin, Daniel J.; Kaartokallio, Hermanni; Tamelander, Tobias
Publisher: Springer Link
Date: 2020
Language: en
Belongs to series: Hydrobiologia 847 11 (2020)
ISSN: 2485-2501
URI: http://hdl.handle.net/10138/335737
Abstract: Cell death drives the magnitude and community composition of phytoplankton and can result in the conversion of particulate organic carbon to dissolved organic carbon (DOC), thereby affecting carbon cycling in the aquatic food web. We used a membrane integrity probe (Sytox Green) to study the seasonal variation in the percentage of viable cells in the phytoplankton population in an estuary in the northern Baltic Sea for 21 months. The associated dissolved and particulate organic matter concentrations were also studied. The viable fraction of phytoplankton cells varied from < 20% to almost 100%, with an average of 62%. Viability was highest when a single phytoplankton group (diatoms or dinoflagellates) dominated the community. Viability of sinking phytoplankton cells, including some motile species, was in general as high as in surface water. Changes in viability were not closely related to nutrient concentrations, virus-like particle abundance, seawater temperature or salinity. There was a weak but significant negative correlation between viability and DOC, although at this location, the DOC pool was mainly influenced by the inflow of riverine water. This study demonstrates that cell viability, and its relationship with carbon export, is highly variable in the complex microbial populations common within estuarine and coastal marine ecosystems.
Subject: sytox green
POC
DOC
cell death
organic matter sedimentation
seasonal variation
seasons
estuarine phytoplankton
carbon dynamics
Baltic Sea
dissolved organic carbon
carbon cycling
aquatic food web
membrane integrity probe
diatoms
dinoflagellates
nutrient concentration
virus-like particle
seawater temperature
salinity
riverine water
carbon export
ecosystem
marine ecosystem
coastal marine ecosystems
Subject (ysa): POC
DOC
solukuolema
orgaanisen materian sedimentaatio
vuodenajat
vaihtelu
variaatio
dynamiikka
hiilen kierto
piilevät
panssarisiimaeliöt
meren lämpötila
meriveden lämpötila
suolapitoisuus
saliniteetti
jokivesi
hiili
ekosysteemit (ekologia)
meren ekosysteemi
meriekosysteemi
Itämeri
Pohjoinen Itämeri
Rights: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.


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