Increased risk of phosphorus limitation at higher temperatures for Daphnia magna

Jonas Persson*, Marcin Włodzimierz Wojewodzic, Dag Olav Hessen, Tom Andersen

*Corresponding author for this work

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Invertebrate herbivores frequently face growth rate constraints due to their high demands for phosphorus (P) and nitrogen (N). Temperature is a key modulator of growth rate, yet the interaction between temperature and P limitation on somatic growth rate is scarcely known. To investigate this interaction, we conducted a study on the somatic growth rate (SGR) of the cladoceran Daphnia magna, known to be susceptible to P-limitation. We determined the SGR across a broad range of dietary P content of algae (carbon (C):P ratios (125-790), and at different temperatures (10-25°C). There was a strong impact of both temperature and C:P ratio on the SGR of D. magna, and also a significant interaction between both factors was revealed. The negative effect of dietary C:P on growth rate was reduced with decreased temperature. We found no evidence of P limitation at lowest temperature, suggesting that enzyme kinetics or other measures of food quality overrides the demands for P to RNA and protein synthesis at low temperatures. These findings also indicate an increased risk of P limitation and thus reduced growth efficiency at high temperatures.

Original languageEnglish
Pages (from-to)123-129
Number of pages7
JournalOecologia
Volume165
Issue number1
DOIs
Publication statusPublished - 2011

Keywords

  • Algae
  • Aquatic
  • Food quality
  • Freshwater
  • Stoichiometry

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