@article{fdi:010074026,
  title = {{M}angrove sediment carbon stocks along an elevation gradient : influence of the late {H}olocene marine regression ({N}ew {C}aledonia)},
  author = {{J}acotot, {A}. and {M}archand, {C}yril and {R}osenheim, {B}. {E}. and {D}omack, {E}. {W}. and {A}llenbach, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}mong blue carbon ecosystems, mangroves are very efficient in storing carbon in their sediments over decadal to millennial time scales. {H}owever, this ability varies with numerous parameters, including climate and sea-level variations. {I}n {N}ew {C}aledonia, mangrove ecosystems develop in semi-arid conditions with a typical zonation: {R}hizophora spp. colonize the seaward side of the intertidal area, while w{A}vicennia marina develops at higher elevations, just below the salt-flat. {W}ithin this context, we determined both the quantity (organic carbon content and carbon stocks) and the characteristics (carbon over nitrogen ratios ({C}/{N}), stable carbon and nitrogen isotopes, radiocarbon age) of the organic matter stored beneath each mangrove stands. {C}arbon stocks were determined down to different limits with depth: approximate extension of the root systems, one-meter depth, and the hard substrate. {W}ithin the extension of the root systems, the sediment carbon stock was lower than 100 {M}g{C} ha(-1) regardless of the mangrove species. {T}his low value resulted directly from the dry climate that limits mangrove productivity. {A}t depth beneath every zone, a buried layer enriched in mangrove-derived organic matter, with {C}/{N} values around 40 and delta {C}-13 values around -26 parts per thousand was observed. {T}his layer likely resulted from a sea-level high stand during the late {H}olocene that allowed a long period of stability of the mangrove, slowly accumulating organic matter within the sediment. {I}n this buried layer, the carbon stock was higher than in the upper sediment and reached up to 665, 255 and 300 {M}g{C} ha(-1) in the salt-flat zone, the {A}. marina stand and the {R}. spp. stand, respectively. {T}he highest stock, determined beneath the salt-flat, was suggested to be related to a period of sea-level stability that lasted similar to 3000 years, whereas beneath the other zones, which are at lower elevations, mangrove colonization was more recent and the sea-level was continuously decreasing till recently. {S}ea level variations, and, specifically current sea-level rise, may strongly influence mangrove development due to their migration along the tidal elevation gradient to maintain the biotic conditions needed for their development.},
  keywords = {{B}lue carbon ; {C}arbon isotopes ; {C}arbon sequestration ; {C}oastal wetlands ; {S}ea-level change ; {S}emi-arid mangrove forest ; {NOUVELLE} {CALEDONIE}},
  booktitle = {},
  journal = {{M}arine {G}eology},
  volume = {404},
  numero = {},
  pages = {60--70},
  ISSN = {0025-3227},
  year = {2018},
  DOI = {10.1016/j.margeo.2018.07.005},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074026},
}