Sampling of “priority protection species”.

<p>The adequacy of sampling was based on richness estimator (Chao estimator) for the internet (raw and adjusted, N = 236 samples; see text for details) and schoolchildren (raw and adjusted, N = 250 samples; see text for details). All the curves reached a plateau, indicating that we adequately sampled the diversity of “priority protection species” both for the internet and for schoolchildren.</p

Local vs. exotic biodiversity.

<p>Proportion of exotic (grey bars) and local (black bars) species for which live specimens have been seen/observed by schoolchildren (“Species observed”), that were successfully identified by schoolchildren (“Species identified”) and that were perceived as “priority protection” by schoolchildren (“Priority protection species”). See text for details.</p

Changes in body size distribution (X-axis) observed in small sea kraits (neonates+juveniles) over time in Ouen Island.

<p>The site was monitored during seven sessions (2010–2011), but we pooled sessions that were separated by less than three weeks (e.g. July & August 2011), resulting into 5 main periods. Different size cohorts, hence age cohorts, are visible. Recaptures of several individuals provide a strong support for the suggested succession of cohorts (cohort <i>n, n+1, n+2</i>; see text). Neonates (less than 50 cm SVL) grow rapidly and generate a shift toward larger body size from winter (July) to summer (December). This is indicated for the cohort <i>n+1</i> with the dashed lines.</p

Proportion of neonate (grey), juvenile (hatched) and adult (black bars) sea kraits observed in different populations of New Caledonia (N = 36 sites where the number of snakes exceeded 10 [Mean = 313 snakes per site, total N = 11,273 observations]).

<p>The populations have been ranked according to the proportion of adults. The first 20 sites are represented by small flat sandy coralline islets while the last four sites have an igneous or rocky substrate and are situated near, or on the shore of the mainland, see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0090246#pone.0090246-Bonnet2" target="_blank">[31]</a> for map details.</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>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 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

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

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