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Marine Biology

, Volume 129, Issue 4, pp 591–593 | Cite as

Silica uptake kinetics of Halichondria panicea in Kiel Bight

  • T. Reincke
  • D. Barthel
Article

Abstract

Besides diatoms Demospongiae are the most important consumers of dissolved silica in the sea. They can play an important role for the silica budget especially in the shallow water areas of the Baltic Sea. The dependence of the silica uptake rate on the silica concentration of the seawater was measured for the sponge Halichondria panicea (Pallas, 1766). The sponges were collected in Kiel Bight. The uptake conformed to Michaelis–Menten kinetics with a half-saturation constant of 46.41 μM and a saturated uptake rate of 19.33 μmol h−1 g−1 ( p < 0.01). In the red algae zone of Kiel Bight the sponges depend on silica supply from the surrounding waters and may be silica-limited rather than food-limited in growth. Because of the much faster uptake of silica by diatoms and their lower saturation point, as well as the difference in spatial distribution of the two main silica consumers, a competition for silica between sponges and diatoms seems unlikely.

Keywords

Sponge Uptake Rate Uptake Kinetic Lower Saturation Silica Concentration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • T. Reincke
    • 1
  • D. Barthel
    • 1
  1. 1.Institut für Meereskunde, Düsternbrooker Weg 20, D-24105 Kiel, GermanyDE

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