Consulta: creatorFacets:"Martias, Chloe"
Registros recuperados: 3
Data/hora: 05/06/2024 18:30:43

In-Situ Variability of DOM in Relation with Biogeochemical and Physical Parameters in December 2017 in Laucala Bay (Fiji Islands) after a Strong Rain Event
Provedor de dados: 5
Autores: Koliyavu, Timoci; Martias, Chloe; Singh, Awnesh; Mounier, Stéphane; Gérard, Philippe; Dupouy, Cecile.
Heavy rain events alter the biogeochemical outflows, affects water quality and ecosystem health within the coastal waters of small Pacific Islands. We characterized snapshots of the optical fingerprints of dissolved organic matter (DOM) sources together with the select nutrients, biogeochemical and physical variables for 10 stations in December 2017 in Laucala Bay, Fiji Islands. DOM absorption coefficients and fluorescence components were determined via spectrofluorometry and Parallel Factor Analysis identifying four components: Type M, two terrestrial (humic, fulvic) components, and a protein component linked to marine biological activity. Associations of DOM together with climate variables and the other tested variables were determined via principal...
Tipo: Text
Palavras-chave: DOM absorption; Fluorescence; Biogeochemistry; PARAFAC; EEM spectra; Autochthonous; Allochthonous; Chlorophyll; CDOM; FDOM.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00682/79372/81889.pdf

Impact of Contrasted Weather Conditions on CDOM Absorption/Fluorescence and Biogeochemistry in the Eastern Lagoon of New Caledonia
Provedor de dados: 5
Autores: Dupouy, Cécile; Röttgers, Rüdiger; Tedetti, Marc; Frouin, Robert; Lantoine, François; Rodier, Martine; Martias, Chloe; Goutx, Madeleine.
New Caledonia (Southwest Pacific), like all tropical Pacific Island countries, is impacted by weather events, climate change, and local anthropogenic forcing. Strong erosion of particles and dissolved organic matter (DOM) from ultramafic rocks, associated with trace metals dissemination (i.e., nickel, manganese and cobalt), potentially affects lagoon waters and coral reefs surrounding the main island. The CALIOPE (CALedonian Inherent Optical PropErties) cruises were performed along the Eastern Lagoon of New Caledonia (ELNC) (400 km, 13 transects from Bay to open ocean, 51 stations) during contrasted meteorological conditions: a dry period (October 2011), a windy situation (March 2014), and a strong rainy event (March 2016). CDOM absorption and fluorescence...
Tipo: Text
Palavras-chave: Chromophoric dissolved organic matter; Fluorescence; New Caledonia; Tropical Pacific; Lagoons; Biooptics; Phytoplankton; Rivers.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00620/73166/72352.pdf

Characterization and sources of colored dissolved organic matter in a coral reef ecosystem subject to ultramafic erosion pressure (New Caledonia, Southwest Pacific)
Provedor de dados: 5
Autores: Martias, Chloe; Tedetti, Marc; Lantoine, Francois; Jamet, Leocadie; Dupouy, Cecile.
The eastern lagoon of New Caledonia (NC, Southwest Pacific), listed as a UNESCO World Heritage site, hosts the world's second longest double-barrier coral reef. This lagoon receives river inputs, oceanic water arrivals, and erosion pressure from ultramafic rocks, enriched in nickel (Ni) and cobalt (Co). The aim of this study was to characterize colored dissolved organic matter (CDOM), as well as to determine its main sources and its possible relationships (through the use of Pearson correlation coefficients, r) with biogeochemical parameters, plankton communities and trace metals in the NC eastern lagoon. Water samples were collected in March 2016 along a series of river/lagoon/open-ocean transects. The absorption coefficient at 350 nm (a(350)) revealed...
Tipo: Text
Palavras-chave: CDOM; Fluorescence; Trace metals; Southwest Pacific; Coral reef lagoon; Rivers.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00481/59307/62061.pdf