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Hydrobiologia

, 533:253 | Cite as

C, N, P concentrations and requirements of flowering Posidonia oceanica

  • Sylvie GobertEmail author
  • Pierre Lejeune
  • Gilles Lepoint
  • Jean-Marie Bouquegneau
Short Resarch Note

Abstract

The carbon, nitrogen and phosphorus contents in flowering and nonflowering shoots were compared after an important flowering event occurred in the Posidonia meadow of the Bay of Calvi. The flower formation caused a significant increase of C and a significant decrease of N concentrations in intermediate and adult leaves. Minimum daily requirements in mgshoot-1day-1 of 3.4 and 4.8 of C, 0.09 and 0.09 N, 0.01 and 0.02 of P respectively for nonflowering and flowering shoots were calculated. It shows that additional quantities of C and P are required for the inflorescence elaboration. The unchanged quantity of N required by the shoot for the inflorescence elaboration and the significant modification of N concentration in intermediate and adult leaves suggests that N is limited in the environment and that an efficient resorption of N occurs from leaves to ensure the inflorescence formation.

Keywords

seagrass flowering Mediterranean sea carbon nitrogen phosphorus Posidonia 

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Copyright information

© Springer 2005

Authors and Affiliations

  • Sylvie Gobert
    • 1
    Email author
  • Pierre Lejeune
    • 2
  • Gilles Lepoint
    • 1
  • Jean-Marie Bouquegneau
    • 1
  1. 1.Mare Center, Oceanology, Life Sciences DepartementUniversity of LiègeLiègeBelgium
  2. 2.STARESO S.A.Calvi (Corse)France

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