Increased temperature, rather than elevated CO2, modulates the carbon assimilation of the Arctic kelps Saccharina latissima and Laminaria solidungula

Ocean acidification and warming are affecting with special intensity the Arctic Ocean. Arctic coastal ecosystems are dominated by kelp forests with a high biomass production, which are expected to be directly affected by the increases in CO2 and temperature. This study presents the different physiological responses of the Arctic kelps Saccharina latissima and Laminaria solidungula from Kongsfjorden (Svalbard) cultured at 4 and 9 °C in combination with current (390 ppm) and increased (1200 ppm) levels of atmospheric CO2. Both species were largely unaffected by increased CO2 conditions. Carbon fixation was not influenced by CO2, indicating that photosynthesis was C-saturated at present levels, and 13C isotopic discrimination values from algal tissue suggested no deactivation of carbon concentrating mechanisms at increased CO2 levels. Inhibition of photosynthesis by carbonic anhydrases (CAs) inhibitors highlighted the important role of external CAs in inorganic carbon acquisition in Arctic kelps. Saccharina latissima showed a significantly higher growth rate at 9 °C than at 4 °C, probably due to the decrease in the dark respiration rate observed. Growth rate of L. solidungula was not affected by temperature or CO2, and increases in photosynthesis at 9 °C could be partially related to a higher dissolved organic carbon release rate. The photochemical performance of both species was not altered by any of the treatments. These results suggest that S. latissima might be more benefited than L. solidungula in a future warmer Arctic, while both populations seem to be resilient to higher CO2 concentrations.

Data and Resources

This dataset has no data

Cite this as

Iñiguez, Concepcion, Carmona, Raquel, Lorenzo, M Rosario, Niell, F Xavier, Wiencke, Christian, Gordillo, Francisco J L (2016). Dataset: Increased temperature, rather than elevated CO2, modulates the carbon assimilation of the Arctic kelps Saccharina latissima and Laminaria solidungula. https://doi.org/10.1594/PANGAEA.870756

DOI retrieved: 2016

Additional Info

Field Value
Imported on November 29, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.870756
Author Iñiguez, Concepcion
Given Name Concepcion
Family Name Iñiguez
More Authors
Carmona, Raquel
Lorenzo, M Rosario
Niell, F Xavier
Wiencke, Christian
Gordillo, Francisco J L
Source Creation 2016
Publication Year 2016
Resource Type text/tab-separated-values - filename: Iniguez_2016
Subject Areas
Name: BiologicalClassification

Name: Biosphere

Name: Chemistry

Name: Oceans

Related Identifiers
Title: Increased temperature, rather than elevated CO2, modulates the carbon assimilation of the Arctic kelps Saccharina latissima and Laminaria solidungula
Identifier: https://doi.org/10.1007/s00227-016-3024-6
Type: DOI
Relation: IsSupplementTo
Year: 2016
Source: Marine Biology
Authors: Iñiguez Concepcion , Carmona Raquel , Lorenzo M Rosario , Niell F Xavier , Wiencke Christian , Gordillo Francisco J L .

Title: seacarb: seawater carbonate chemistry with R. R package version 3.1
Identifier: https://cran.r-project.org/package=seacarb
Type: DOI
Relation: References
Year: 2016
Authors: Gattuso Jean-Pierre , Epitalon Jean-Marie , Lavigne Héloïse , Orr James C , Gentili Bernard , Proye Aurélien , Soetaert Karline , Rae James .