Hydrobiologia

, Volume 543, Issue 1, pp 233–243 | Cite as

Seasonal dynamics of Zostera noltii Hornem. in two Mediterranean lagoons

  • Christine Pergent-Martini
  • Vanina Pasqualini
  • Lila Ferrat
  • Gérard Pergent
  • Catherine Fernandez
Primary Research Paper
Received:
Revised:
Accepted:

Abstract

The density, biomass and shoot morphology of two populations of Zostera noltii were monitored from January 1998 to July 1999 at two shallow Mediterranean lagoons of Biguglia and Urbino, which differ in hydro-morphological conditions and nutrient loading. Monitoring included the principal biological and foliar parameters (shoot density, aboveground and belowground biomass, length, width and number of leaves, LAI and coefficient A: percentage of leaves having lost their apex), the organic matter contents of the sediment and the environmental conditions (salinity, turbidity, temperature, nutrient concentrations and dissolved oxygen levels). The two populations of Z. noltii displayed seasonal changes in density (1600–19600 m2), aboveground biomass (11–153 g. DW. m−2), leaf length (33–255 mm), and leaf width (0.9–1.8 mm). Temperature and turbidity were significant environmental factors influencing the temporal changes observed in the Z. noltii meadows studied. Conversely, the belowground biomass, the number of leaves per shoot and the LAI did not undergo any seasonal changes. In the Biguglia lagoon, the functioning dynamics of the Z. noltii seagrass beds are determined by the catchment area and the inputs of nutrients derived from it, whereas in the Urbino lagoon the dynamics of the Z. noltiibeds depend on low levels of water turbidity.

Keywords

coastal lagoon Mediterranean population dynamics seagrass Zostera noltii 
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Copyright information

© Springer 2005

Authors and Affiliations

  • Christine Pergent-Martini
    • 1
  • Vanina Pasqualini
    • 1
  • Lila Ferrat
    • 1
  • Gérard Pergent
    • 1
  • Catherine Fernandez
    • 2
  1. 1.Equipe Ecosystèmes LittorauxUniversity of CorsicaCorteFrance
  2. 2.IMEP UMR-CNRS 6116 - Centre St Jérôme- case 421bisUniversity of ProvenceMarseille cedex 20France

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