The New Caledonian Archipelago is a hot spot for biodiversity and endemism. Here, we report on new records of nine species from localities on the main island, Grande Terre, and illustrate these: Ilyodromus viridulus (Brady, 1886), Stenocypris hislopi Ferguson, 1969, S. macedonica Petkovski & Meisch, 1996¸ S. malayica Victor & Fernando, 1981, Bradleytriebella lineata (Victor & Fernando, 1981), Hemicypris pyxidata (Moniez, 1892), Heterocypris incongruens (Ramdohr, 1808), Cypridopis vidua (O.F. Müller, 1776) and Limnocythere stationis Vávra, 1891. We also provide redescriptions and illustrations of the valves and carapace of Stenocypris marginata Daday, 1910 sensu Méhes, 1939, Cypris granulata Daday, 1898 and Kennethia major (Méhes, 1939); for the latter species also including some soft parts. Therefore, twenty two certain species have thus far been reported from the New Caledonian Archipelago. The status of seven uncertain species is also discussed. Previous records of Stenocypris major (Baird, 1859) from Grande Terre, mainly by Méhes, are here considered to belong to S. hislopi. We propose to reject the presence of Cyprinotus cingalensis Brady, 1886 in New Caledonia and suggest to consider Cypridopsis sarasini Méhes, 1939 as an “uncertain species” (sensu Meisch et al. 2019). We also argue that Eucypris wolffhuegeli Méhes, 1914 might be a synonym of H. incongruens and suggest that Strandesia rouxi Méhes, 1939 might be considered a junior synonym of an existing species, pending further research.
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RBINS Staff Publications 2024
Anthropogenic activities that disturb the seafloor inadvertently affect the organic carbon cycle. Mobile bottom-contacting fishing (MBCF) is a widespread fishing technique that involves the dragging of fishing gear across the seafloor and disrupts seafloor sediments and alters carbon storage dynamics. However, the impact of MBCF on carbon sequestration is still not well quantified, with global estimates of MBCF-induced carbon release ranging from less than 17 Mt C yr−¹ to 400 Mt C yr−¹ with limited assessment of associated uncertainties. Addressing these knowledge gaps is essential for informing effective, evidence-based policy. Here, we force a carefully parametrized organic carbon mineralization model with empirical relationships and observational data from the Northwest European continental shelf and use a Monte-Carlo approach to assess the uncertainty associated to our estimate. We find that MBCF on the Northwest European continental shelf could reduce sedimentary carbon storage by 270 kt C yr−¹. However, the estimated uncertainty remains large (25%-75% percentile range = 620 kt C yr−1), mainly due to uncertainties in the spatial variability of organic carbon reactivity. Our findings also show that the divergence of carbon release estimates in the literature is primarily due to differences in how organic carbon reactivity is parameterized, with higher release estimates often reflecting overestimated mineralization rates. Overall, our study demonstrates the need for targeted experimental studies to quantify how sediment disturbance influences organic carbon reactivity, to better constrain the impacts of anthropogenic activities on the marine carbon cycle and support accurate carbon accounting and informed policymaking.
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RBINS Staff Publications 2025
