Home About Browse Search
Svenska


Modeling cyanobacteria life cycle dynamics and historical nitrogen fixation in the Baltic Proper

Hieronymus, Jenny and Eilola, Kari and Olofsson, Malin and Hense, Inga and Meier, H. E. Markus and Almroth-Rosell, Elin (2021). Modeling cyanobacteria life cycle dynamics and historical nitrogen fixation in the Baltic Proper. Biogeosciences. 18 , 6213-6227
[Research article]

[img] PDF
2MB

Abstract

Dense blooms of filamentous diazotrophic cyanobacteria are formed every summer in the Baltic Sea. These autotrophic organisms may bypass nitrogen limitation by performing nitrogen fixation, which also governs surrounding organisms by increasing bioavailable nitrogen. The magnitude of the nitrogen fixation is important to estimate from a management perspective since this might counteract eutrophication reduction measures. Here, a cyanobacteria life cycle model has been implemented for the first time in a high-resolution 3D coupled physical and biogeochemical model of the Baltic Sea, spanning the years 1850-2008. The explicit consideration of life cycle dynamics and transitions significantly improves the representation of the cyanobacterial phenological patterns compared to earlier 3D modeling efforts. Now, the rapid increase and decrease in cyanobacteria in the Baltic Sea are well captured, and the seasonal timing is in concert with observations. The current improvement also had a large effect on the nitrogen fixation load and is now in agreement with estimates based on in situ measurements. By performing four phosphorus sensitivity runs, we demonstrate the importance of both organic and inorganic phosphorus availability for historical cyanobacterial biomass estimates. The model combination can be used to continuously predict internal nitrogen loads via nitrogen fixation in Baltic Sea ecosystem management, which is of extra importance in a future ocean with changed conditions for the filamentous cyanobacteria.

Authors/Creators:Hieronymus, Jenny and Eilola, Kari and Olofsson, Malin and Hense, Inga and Meier, H. E. Markus and Almroth-Rosell, Elin
Title:Modeling cyanobacteria life cycle dynamics and historical nitrogen fixation in the Baltic Proper
Series Name/Journal:Biogeosciences
Year of publishing :2021
Volume:18
Page range:6213-6227
Number of Pages:15
Publisher:COPERNICUS GESELLSCHAFT MBH
ISSN:1726-4170
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
URN:NBN:urn:nbn:se:slu:epsilon-p-114657
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114657
Additional ID:
Type of IDID
DOI10.5194/bg-18-6213-2021
Web of Science (WoS)000724550200001
ID Code:26294
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:09 Dec 2021 17:25
Metadata Last Modified:09 Dec 2021 17:31

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits