CO2 and inorganic nutrient enrichment affect the performance of a calcifying green alga and its noncalcifying epiphyte

Ocean acidification studies in the past decade have greatly improved our knowledge of how calcifying organisms respond to increased surface ocean CO2 levels. It has become evident that, for many organisms, nutrient availability is an important factor that influences their physiological responses and competitive interactions with other species. Therefore, we tested how simulated ocean acidification and eutrophication (nitrate and phosphate enrichment) interact to affect the physiology and ecology of a calcifying chlorophyte macroalga (Halimeda opuntia (L.) J.V. Lamouroux) and its common noncalcifying epiphyte (Dictyota sp.) in a 4-week fully crossed multifactorial experiment. Inorganic nutrient enrichment (+NP) had a strong influence on all responses measured with the exception of net calcification. Elevated CO2 alone significantly decreased electron transport rates of the photosynthetic apparatus and resulted in phosphorus limitation in both species, but had no effect on oxygen production or respiration. The combination of CO2 and +NP significantly increased electron transport rates in both species. While +NP alone stimulated H. opuntia growth rates, Dictyota growth was significantly stimulated by nutrient enrichment only at elevated CO2, which led to the highest biomass ratios of Dictyota to Halimeda. Our results suggest that inorganic nutrient enrichment alone stimulates several aspects of H. opuntia physiology, but nutrient enrichment at a CO2 concentration predicted for the end of the century benefits Dictyota sp. and hinders its calcifying basibiont H. opuntia.

Data and Resources

This dataset has no data

Cite this as

Hofmann, Laurie C, Bischof, Kai, Baggini, Cecilia, Johnson, Andrew, Koop-Jakobsen, Ketil, Teichberg, Mirta (2015). Dataset: CO2 and inorganic nutrient enrichment affect the performance of a calcifying green alga and its noncalcifying epiphyte. https://doi.org/10.1594/PANGAEA.847446

DOI retrieved: 2015

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.847446
Author Hofmann, Laurie C
Given Name Laurie C
Family Name Hofmann
More Authors
Bischof, Kai
Baggini, Cecilia
Johnson, Andrew
Koop-Jakobsen, Ketil
Teichberg, Mirta
Source Creation 2015
Publication Year 2015
Resource Type text/tab-separated-values - filename: Hofmann_2015
Subject Areas
Name: BiologicalClassification

Name: Chemistry

Name: Ecology

Related Identifiers
Title: CO2 and inorganic nutrient enrichment affect the performance of a calcifying green alga and its noncalcifying epiphyte
Identifier: https://doi.org/10.1007/s00442-015-3242-5
Type: DOI
Relation: IsSupplementTo
Year: 2015
Source: Oecologia
Authors: Hofmann Laurie C , Bischof Kai , Baggini Cecilia , Johnson Andrew , Koop-Jakobsen Ketil , Teichberg Mirta .

Title: seacarb: seawater carbonate chemistry with R. R package version 3.0.6
Identifier: https://cran.r-project.org/package=seacarb
Type: DOI
Relation: References
Year: 2015
Authors: Gattuso Jean-Pierre , Epitalon Jean-Marie , Lavigne Héloïse .