A new set of N isotopic reference values for monitoring Ulva green tides in coral reef ecosystems - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Marine Pollution Bulletin Année : 2024

A new set of N isotopic reference values for monitoring Ulva green tides in coral reef ecosystems

Résumé

Green tides occurrence has increased in coral reefs, yet few reference values have been documented to support bloom management in these ecosystems. Here, we took advantage of recent Ulva green tides that occurred in New Caledonia to (i) identify the elements limiting the growth of Ulva spp. during these blooms; and (ii) validate the use of isotopic markers for identifying sources of nutrients that generated blooms. N/P ratios highlighted a stronger limitation of algae by phosphorus than by nitrogen on sites under oceanic influence, while the proportions of N and P were optimal for algal growth at sites where green tides occurred. Macroalgae highly exposed to sewage water was characterized by higher δ15N than macroalgae collected in areas exposed to synthetic inorganic fertilizers. From these results, we established a new set of threshold values for using δ15N in Ulva species as an indicator of nitrogen source type in coral reefs.
Fichier non déposé

Dates et versions

hal-04540167 , version 1 (10-04-2024)

Identifiants

Citer

Simon van Wynsberge, Florence Antypas, Maele Brisset, Anne Desnues, Léocadie Jamet, et al.. A new set of N isotopic reference values for monitoring Ulva green tides in coral reef ecosystems. Marine Pollution Bulletin, 2024, 200, 116152 (10p.). ⟨10.1016/j.marpolbul.2024.116152⟩. ⟨hal-04540167⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More