Phytoplankton phosphorus limitation and food quality for Bosmina

Kimberly L. Schulz, Robert W. Sterner

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

Recent studies have demonstrated that Daphnia, a cladoceran (anomopod) zooplankton species with a high phosphorus content, can become P limited when fed algae deficient in phosphorus. Bosmina is another common anomopod zooplankter, but its body has a lower percentage of P than does that of Daphnia, and Bosmina might therefore be less susceptible to P mineral limitation. To test for this hypothesized interspecific difference in nutrition, Bosmina and Daphnia were raised on two food types: P-deficient or P-sufficient Scenedesmus acutus in two concentrations (0.2 or 1.0 mg C L-1). As predicted by its lower P content, Bosmina growth and fecundity were not affected by the P content of algal food, even though P-deficient food caused significant declines in these life history parameters for Daphnia. Results suggest that Bosmina has a lower P requirement than does Daphnia and that Bosmina may process phosphorus more efficiently or be better able to survive losses in body P content. The outcome of competition between Bosmina and Daphnia therefore might shift in favor of low-P-content zooplankton such as Bosmina under conditions of seston P mineral limitation.

Original languageEnglish (US)
Pages (from-to)1549-1556
Number of pages8
JournalLimnology and Oceanography
Volume44
Issue number6
DOIs
StatePublished - Sep 1999

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