Publications by authors named "Marie Jose Langlade"
This study quantifies benthic nutrient fluxes and sedimentation rates in the Ahe Atoll lagoon (French Polynesia), in two stations located under pearl oyster frames, and two control stations away from the pearl culture facility. Dissolved inorganic nitrogen fluxes ranged between 2 and 35 μmol N m(-2) h(-1) and Soluble Reactive Phosphorus varied between -3 and 8.2 μmol P m(-2) h(-1).
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- The study examined the Ahe deep lagoon in French Polynesia over three years, focusing on the food sources available for pearl oysters, particularly phytoplankton.
- The average chlorophyll level was low at 0.34±0.01 μg L(-1), and the research did not show increased phytoplankton biomass in deeper waters.
- Nitrogen limitation and more respiratory processes than photosynthetic ones were noted, with pearl oysters consuming mostly non-chlorophyll particles without significantly reducing phytoplankton biomass.
Dinitrogen-fixing organisms in cyanobacterial mats were studied in two shallow coral reef ecosystems: La Reunion Island, southwestern Indian Ocean, Sesoko (Okinawa) Island, and northwestern Pacific Ocean. Rapidly expanding benthic miniblooms, frequently dominated by a single cyanobacterial taxon, were identified by microscopy and molecular tools. In addition, nitrogenase activity by these blooms was measured in situ.
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