Summary of the significant spatial variability of isotopic signatures (δ¹³C and δ¹⁵N) of the sources of organic matter in the SW lagoon of New Caledonia in 2011.

<p>Analyses were run with three-way ANOVAs or Kruskal-Wallis tests: zone (i.e. Grand Nouméa <i>versus</i> Grand Sud) x site (fringing <i>versus</i> intermediate <i>versus</i> barrier reef) x season (summer <i>versus</i> winter).</p><p>ns = p> 0.05</p><p>* p< 0.05</p><p>** p< 0.01</p><p>*** p< 0.001.</p><p>POM = particulate organic matter, SOM = sedimentary organic matter.</p><p>Summary of the significant spatial variability of isotopic signatures (δ¹³C and δ¹⁵N) of the sources of organic matter in the SW lagoon of New Caledonia in 2011.</p

Mean δ¹³C and δ¹⁵N isotopic ratios (± sd) of primary producers sampled in the SW lagoon of New Caledonia (data from 2010 and 2011 pooled).

<p>Mean δ¹³C and δ¹⁵N isotopic ratios (± sd) of primary producers sampled in the SW lagoon of New Caledonia (data from 2010 and 2011 pooled).</p

Mean isotopic signatures (± sd) in carbon (δ¹³C) and nitrogen (δ¹⁵N) for the different sources of organic matter sampled along coast-to-ocean gradients, both zones and seasons pooled, in the SW lagoon of New Caledonia in 2011.

<p>POM = particulate organic matter, SOM = sedimentary organic matter, FR = fringing reef, IR = intermediate reef and BR = barrier reef.</p><p>Only sources present on at least two reef types were shown.</p

Relative importance of river POM, marine POM and <i>Trichodesmium</i> spp. (Tricho.) in the isotopic composition of coral reef POM on fringing, intermediate, and barrier reefs.

<p>Shaded boxes represent, from dark to light grey, 50%, 75%, and 95% Bayesian credibility intervals.</p

Study sites locations in the southwest lagoon of New Caledonia, SW Pacific Ocean.

<p>White marks: OM sources sampled for the first objective in rivers (triangles) and lagoon sites (circles). Grey circles: OM sources sampled in lagoon sites along the two coast-to-ocean gradients for the second objective.</p

Ranges of isotopic signature values (top: δ¹³C; bottom: δ¹⁵N) for the major OM sources in the SW lagoon of New Caledonia.

<p>All the data sampled were pooled into one single data set.</p

Ranges of isotopic signatures (δ¹³C and δ¹⁵N) of major primary producers on aquatic ecosystems following Ostrom and Fry (1993) (a), and comparison with the present study results (b).

<p>Ranges of isotopic signatures (δ¹³C and δ¹⁵N) of major primary producers on aquatic ecosystems following Ostrom and Fry (1993) (a), and comparison with the present study results (b).</p

Relative importance of various OM sources in the isotopic composition of SOM in mangroves, coastal soft-bottoms, fringing, intermediate, and barrier reefs.

<p>Sources codes: (1) river POM, (2) marine POM, (3) <i>Trichodesmium</i> spp., (4) mangroves leaves, (5) seagrass, (6) algal turf, (7) Chlorophytae (calcareous), (8) Phaeophycae, and (9) Rhodophytae. Shaded boxes represent 50%, 75% and 95% Bayesian credibility intervals from dark to light grey.</p