@article {4637, title = {First record of Siganus randalli (Teleost, Siganidae) in New Caledonia, and comments on its diet}, journal = {Marine Biodiversity Records}, volume = {9}, year = {2016}, month = {11/2016}, pages = {1-5}, abstract = {

Background: Most of the 29 Siganidae species are widely distributed through the Indo-Pacific area. In New
Caledonia, these family was represented by 12 species. The present report is the first record of Siganus randalli in New
Caledonian waters and provide information on its diet.
Methods: Three specimens of Siganus randalli were caught in shallow mangrove waters of the southern part of New
Caledonia. Their stomach contents and isotopic signatures (carbon and nitrogen) were analyzed and compared to
others siganids species.
Results and conclusion: This note provides the most southerly record of the rabbitfish Siganus randalli, which extends
its distribution range by 1200 km southward and 1300 km southwest. The data on its diet, when compared with other
co-occurring or more reef-associated siganid species, provide information on feeding processes and ecological
functions associated with its mangrove habitat.
Keywords: Variegated rabbitfish, Diet, Stomach content, Isotope, SW pacific
Abbreviations: ADECAL, Agence de d{\'e}veloppement {\'e}conomique de la Nouvelle-Cal{\'e}donie; ARR, Arr{\^e}t{\'e};
C, Carbon; DENV, Direction de l{\textquoteright}environnement; G, grams; IRI, Index of relative importance; LIVE, Laboratoire
insulaire du vivant et de l{\textquoteright}environnement; MM, millimeter; N, Nitrogen; SD, standard deviation; TL, Total length;
UNC, Universit{\'e} de la Nouvelle-Cal{\'e}donie

}, doi = {DOI 10.1186/s41200-016-0082-x}, author = {Thibaud Moleana and Luc Della-Patrona and Tarik Meziane and Yves Letourneur} } @article {3559, title = {Concentrations and Fractionation of Carbon, Iron, Sulfur, Nitrogen and Phosphorus in Mangrove Sediments Along an Intertidal Gradient (Semi-Arid Climate, New Caledonia)}, journal = {J. Mar. Sci. Eng.}, year = {2015}, month = {02/2015}, pages = {52-57}, type = {OPEN ACCESS}, abstract = {

In mangrove ecosystems, strong reciprocal interactions exist between plant and substrate. Under semi-arid climate, Rhizophora spp. are usually predominant, colonizing the seashore, and Avicennia marina develops at the edge of salt-flats, which is the highest zone in the intertidal range. Along this zonation, distribution and speciation of C, Fe, S, N, and P in sediments and pore-waters were investigated. From the land-side to the sea-side of the mangrove, sediments were characterized by I/ increase in: (i) water content; (ii) TOC; (iii) mangrove-derived OM; II/ and decrease in: (i) salinity; (ii) redox; (iii) pH; (iv) solid Fe and solid P. Beneath Avicennia and Rhizophora, TS accumulated at depth, probably as a result of reduction of iron oxides and sulfate. The loss of total Fe observed towards the sea-side may be related to sulfur oxidation and to more intense tidal flushing of dissolved components. Except the organic forms, dissolved N and P concentrations were very low beneath Avicennia and Rhizophora stands, probably as a result of their uptake by the root systems. However, in the unvegetated salt-flat, NH4+ can accumulate in organic rich and anoxic layers. This study shows: (i) the evolution of mangrove sediment biogeochemistry along the intertidal zone as a result of the different duration of tidal inundation and organic enrichment; and (ii) the strong links between the distribution and speciation of the different elements.

}, keywords = {biogeochemistry, Mangrove, New Caledonia, zonation}, issn = {2077-1312}, author = {Jonhatan Deborde and Cyril Marchand and Nathalie Molnar and Luc Della-Patrona and Tarik Meziane} }