Preliminary assessments of the impact of Ostreopsis cf. ovata (Dinophyceae) development on macroinvertebrates in the North Western Mediterranean Sea
type: Dataset
description: The development of Ostreopsis cf. ovata, a toxic benthic dinoflagellate has increased in the North Western Mediterranean Sea, causing health, ecological and economical concerns. In order to understand the ecological impact on macroinvertebrates, a preliminary study was carried on edible grazers, the sea urchin Paracentrotus lividus and the limpet Patella spp. Their densities were followed toward the abundance of O. cf. ovata. Thus, in 2008, we performed a monthly field survey in scuba-diving in three sites of the North Western Mediterranean Sea (Genoa, Nice and Villefranche-sur-Mer) at the sea surface and at 1 and 3 m depth. Results showed that at 1 m and 3 m depth, the density of P. lividus was not clearly affected by a strong development of Ostreopsis. Decrease in P. lividus abundance may be due to natural variation or to fishing activities especially in France. Regarding the density of Patella spp., only one significant decrease was observed between July and August 2008 in Genoa. Patella species are living in the interdital zone, we could therefore hypothese that the limpets were intoxicated either by direct ingestion of O. cf ovata by grazing and/or by the toxins released in the surrounding water.
issued: 2026-05-07T13:27:50.052093
language: en
modified: 2026-05-07T13:27:50.052097
contact point: Organization
  fn: CCSD
keyword: infoeu-reposemanticsarticle
keyword: journal-articles
keyword: macroinvertebrates
keyword: mediterranean-sea
keyword: ostreopsis
keyword: paracentrotus-lividus
keyword: patella-spp
keyword: sdebeenvironmental-sciencesbiodiversity-and-ecology
landing page: 0181-1568

Preliminary assessments of the impact of Ostreopsis cf. ovata (Dinophyceae) development on macroinvertebrates in the North Western Mediterranean Sea
type: Distribution
format: HTML
issued: 2026-05-07T13:27:50.057928
modified: 2026-05-07T13:27:50.040953
access URL: https://hal.science/hal-00927001

test_moissonnage_selune
type: Agent