Nutrient limitation reduces food quality for zooplankton: Daphnia response to seston phosphorus enrichment

James Elser, Kazuhide Hayakawa, Jotaro Urabe

Research output: Contribution to journalArticle

201 Scopus citations

Abstract

Laboratory studies are increasingly indicating that the quality of nutrient-limited algae is suboptimal for zooplankton production. However, little is known about how quality is affected by nutrient limitation of phytoplankton in more natural situations. To test for phosphorus (P) limitation of zooplankton growth under realistic food conditions, we performed a set of 5-d experiments using Daphnia dentifera and suspended particulate matter (seston) from three lakes at the Experimental Lakes Area (Ontario, Canada). Neonate Daphnia fed for 6 h per day on freshly collected seston enriched or unenriched with PO4 and spent the rest of the day feeding on unaltered natural seston. PO4 enrichment did not affect food abundance or concentrations and composition of essential fatty acids but dramatically lowered seston C:P ratio and significantly stimulated Daphnia growth. These results demonstrate that, even with field-collected seston, the effects of algal phosphorus limitation can extend to herbivores through reduced food quality.

Original languageEnglish (US)
Pages (from-to)898-903
Number of pages6
JournalEcology
Volume82
Issue number3
StatePublished - Mar 8 2001

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Keywords

  • C:P ratio
  • Daphnia dentifera
  • Daphnia growth vs. P availability in food
  • Experimental Lakes Area (Ontario, Canada)
  • Fatty acids
  • Food quality
  • Nutrient limitation
  • Phosphorus limitation and food quality
  • Zooplankton

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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