Driving factors behind the distribution of dinocyst composition and abundance in surface sediments in a western Mediterranean coastal lagoon: Report from a high resolution mapping study - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Marine Pollution Bulletin Année : 2014

Driving factors behind the distribution of dinocyst composition and abundance in surface sediments in a western Mediterranean coastal lagoon: Report from a high resolution mapping study

Mouna Fertouna-Bellakhal
  • Fonction : Auteur
Amel Dhib
  • Fonction : Auteur
  • PersonId : 773006
  • IdRef : 223402699
Béchir Béjaoui
  • Fonction : Auteur
Souad Turki
  • Fonction : Auteur
Lotfi Aleya
  • Fonction : Auteur
  • PersonId : 865719

Résumé

Species composition and abundance of dinocysts in relation to environmental factors were studied at 123 stations of surface sediment in Bizerte Lagoon. Forty-eight dinocyst types were identified, mainly dominated by Brigantidinium simplex, Votadinum spinosum, Alexandrium pseudogonyaulax, Alexandrium catenella, and Lingulodinum machaerophorum along with many round brown cysts and spiny round brown cysts. Cysts ranged from 1276 to 20126 cysts g−1 dry weight sediment. Significant differences in cyst distribution pattern were recorded among the zones, with a higher cyst abundance occurring in the lagoon’s inner areas. Redundancy analyses showed two distinct associations of dinocysts according to location and environmental variables. Ballast water discharges are potential introducers of non-indigenous species, especially harmful ones such as A. catenella and Polysphaeridium zoharyi, with currents playing a pivotal role in cyst distribution. Findings concerning harmful cyst species indicate potential seedbeds for initiation of future blooms and outbreaks of potentially toxic species in the lagoon.
Fichier non déposé

Dates et versions

hal-01104822 , version 1 (19-01-2015)

Identifiants

Citer

Mouna Fertouna-Bellakhal, Amel Dhib, Béchir Béjaoui, Souad Turki, Lotfi Aleya. Driving factors behind the distribution of dinocyst composition and abundance in surface sediments in a western Mediterranean coastal lagoon: Report from a high resolution mapping study. Marine Pollution Bulletin, 2014, 84 (1-2), pp.347-362. ⟨10.1016/j.marpolbul.2014.04.041⟩. ⟨hal-01104822⟩
425 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More