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C, N, P concentrations and requirements of flowering Posidonia oceanica shoots
Gobert, S.; Lejeune, P.; Lepoint, G.; Bouquegneau, J.M. (2005). C, N, P concentrations and requirements of flowering Posidonia oceanica shoots. Hydrobiologia 533: 253-259. dx.doi.org/10.1007/s10750-004-2487-5
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer
Peer reviewed article  

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Trefwoorden
    Posidonia oceanica (Linnaeus) Delile, 1813 [WoRMS]
    Marien
Author keywords
    seagrass; flowering; Mediterranean sea; carbon; nitrogen; phosphorus;

Auteurs  Top 
  • Gobert, S.
  • Lejeune, P.
  • Lepoint, G.
  • Bouquegneau, J.M.

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 mg shoot-1 day-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.

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