Phytoplankton community responses to temperature fluctuations under different nutrient concentrations and stoichiometry - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Ecology Année : 2019

Phytoplankton community responses to temperature fluctuations under different nutrient concentrations and stoichiometry

Résumé

Nutrient availability and temperature are important drivers of phytoplankton growth and stoichiometry. However, the interactive effects of nutrients and temperature on phytoplankton have been analyzed mostly by addressing changes in average temperature, whereas recent evidence suggests an important role of temperature fluctuations. In a laboratory experiment, we grew a natural phytoplankton community under fluctuating and constant temperature regimes across 25 combinations of nitrogen (N) and phosphorus (P) supply. Temperature fluctuations decreased phytoplankton growth rate (rmax), as predicted by nonlinear averaging along the temperature–growth relationship. rmax increased with increasing P supply, and a significant temperature × P × N interaction reflected that the shape of the thermal reaction norm depended on nutrients. By contrast, phytoplankton carrying capacity increased with N supply and in fluctuating rather than constant temperature. Higher phytoplankton N:P ratios under constant temperature showed that temperature regimes affected cellular nutrient incorporation. Minor differences in species diversity and composition existed. Our results suggest that temperature variability interacts with nutrient supply to affect phytoplankton physiology and stoichiometry at the community level.
Fichier principal
Vignette du fichier
Ecology - 2019 - Gerhard - Phytoplankton community responses to temperature fluctuations under different nutrient.pdf (1.85 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Licence : CC BY - Paternité

Dates et versions

hal-03969147 , version 1 (02-02-2023)

Licence

Paternité

Identifiants

Citer

Miriam Gerhard, Apostolos‐manuel Koussoroplis, Helmut Hillebrand, Maren Striebel. Phytoplankton community responses to temperature fluctuations under different nutrient concentrations and stoichiometry. Ecology, 2019, 100 (11), ⟨10.1002/ecy.2834⟩. ⟨hal-03969147⟩
6 Consultations
39 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More