IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Selective silicate-directed motility in diatoms
Bondoc, K.; Heuschele, J.; Gillard, J.; Vyverman, W.; Pohnert, G. (2016). Selective silicate-directed motility in diatoms. Nature Comm. 7: 10540. dx.doi.org/10.1038/ncomms10540
In: Nature Communications. Nature Publishing Group: London. ISSN 2041-1723, more
Peer reviewed article  

Available in Authors 

Keywords
    Marine; Brackish water; Fresh water

Authors  Top 
  • Bondoc, K.
  • Heuschele, J.
  • Gillard, J., more
  • Vyverman, W., more
  • Pohnert, G.

Abstract
    Diatoms are highly abundant unicellular algae that often dominate pelagic as well as benthic primary production in the oceans and inland waters. Being strictly dependent on silica to build their biomineralized cell walls, marine diatoms precipitate 240 × 1012 mol Si per year, which makes them the major sink in the global Si cycle. Dissolved silicic acid (dSi) availability frequently limits diatom productivity and influences species composition of communities. We show that benthic diatoms selectively perceive and behaviourally react to gradients of dSi. Cell speed increases under dSi-limited conditions in a chemokinetic response and, if gradients of this resource are present, increased directionality of cell movement promotes chemotaxis. The ability to exploit local and short-lived dSi hotspots using a specific search behaviour likely contributes to micro-scale patch dynamics in biofilm communities. On a global scale this behaviour might affect sediment–water dSi fluxes and biogeochemical cycling.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors