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A three-stage symbiosis forms the foundation of seagrass ecosystems
van der Heide, T.; Govers, L.L.; de Fouw, J.; Olff, H.; van der Geest, M.; van Katwijk, M.M.; Piersma, T.; van de Koppel, J.; Silliman, B.R.; Smolders, A.J.P.; van Gils, J.A. (2012). A three-stage symbiosis forms the foundation of seagrass ecosystems. Science (Wash.) 336(6087): 1432-1434. dx.doi.org/10.1126/science.1219973
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075; e-ISSN 1095-9203, more
Peer reviewed article  

Available in  Authors 

Keywords
    Ecosystems
    Interspecific relationships > Symbiosis
    Seagrass
    Marine/Coastal

Authors  Top 
  • van der Heide, T.
  • Govers, L.L.
  • de Fouw, J., more
  • Olff, H.
  • van der Geest, M., more
  • van Katwijk, M.M., more
  • Piersma, T., more
  • van de Koppel, J., more
  • Silliman, B.R.
  • Smolders, A.J.P.
  • van Gils, J.A., more

Abstract
    Seagrasses evolved from terrestrial plants into marine foundation species around 100 million years ago. Their ecological success, however, remains a mystery because natural organic matter accumulation within the beds should result in toxic sediment sulfide levels. Using a meta-analysis, a field study, and a laboratory experiment, we reveal how an ancient three-stage symbiosis between seagrass, lucinid bivalves, and their sulfide-oxidizing gill bacteria reduces sulfide stress for seagrasses. We found that the bivalve-sulfide-oxidizer symbiosis reduced sulfide levels and enhanced seagrass production as measured in biomass. In turn, the bivalves and their endosymbionts profit from organic matter accumulation and radial oxygen release from the seagrass roots. These findings elucidate the long-term success of seagrasses in warm waters and offer new prospects for seagrass ecosystem conservation.

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