Publications ENTROPIE IRD

The effects of climate change are hindering the ability of the world to achieve the Sustainable Development Goals (SDG) by 2030. In particular, the success of SDG 2 (Zero hunger) is threatened by the impacts of climate change on global food production, le…

Environmental DNA (eDNA) metabarcoding is an innovative tool that is transforming ecological research. It offers a simple and effective method for simultaneously detecting numerous species across a wide range of environments. The method relies on assignin…

The blue economy agenda has generated tensions over marine space use, often marginalising small-scale fisheries in development policies. Boat tracking technology has only recently begun to be applied in these fisheries, but it offers a promising approach …

Incorporating meaningful social and economic information into conservation planning is challenging but critical to minimizing impacts of conservation actions on livelihoods and increasing the likelihood of compliance with restrictions on resource use. The…

Marine ecosystems are increasingly threatened by overfishing, pollution, coastal development and climate change, underscoring the need for long-term, representative information on key fish populations and habitats to inform management and policy. Underwat…

Freshwater ecosystems on tropical oceanic islands host unique biodiversity. On Réunion Island, freshwater decapod crustaceans are key indicators of ecosystem health, yet their distribution and conservation status remain poorly documented. This study aimed…

Coral reefs are vital social-ecological systems, but highly vulnerable to global change and local stressors. While conveying the urgency of existential threats is paramount, bleak outlooks can become self-reinforcing, limiting capacities to act. To counte…

The participation of stakeholders in the design of fisheries policy instruments has emerged worldwide as good governance practice. Their participation is expected to ensure that policies are context-specific, address local needs and ecological realities, …

The ocean is essential for humanity1, 2-3. Yet, inequity in ocean-based activities is widespread and accelerating4, 5, 6, 7-8. Addressing this requires governance approaches that can systematically measure equity and track progress9. Here we present the O…

Unravelling food web dynamics across biological communities is a central goal of ecology. In size-structured ecosystems, the shape of trophic pyramids is often inferred from their size spectra-the distribution of biomass across body-mass classes. Size-spe…

Les experts du GIEC1 ont souligné la vulnérabilité des territoires insulaires face aux changements climatiques. Leurs impacts, déjà visibles en Nouvelle-Calédonie et dans la région Pacifique, constituent une préoccupation majeure pour les décideurset les …

The largest part of the lagoon of New Caledonia was registered in the list of world heritage of UNESCO in 2008. This registration is also a challenge: that of managing coviability between economic development and the conservation of natural heritage. A su…

The western Indian Ocean (WIO) is recognized as a marine biodiversity hotspot with complex oceanographic circulation resulting in limited connectivity between remote islands. This ocean region comprises several subregions of varying biodiversity, with the…

Marine heatwaves (MHWs) are increasingly recognised as a more immediate threat to the persistence of coral reefs than the longer-term impacts of climate change. However, major gaps still exist in our understanding of MHW impacts on many reef organisms. Sp…

Marine plastic debris provides a novel substrate for microbial colonization, potentially facilitating the spread of pathogens in marine environments. At Reunion Island (Southwest Indian Ocean), injured sea turtles undergoing rehabilitation at the Kelonia …

Precise lagoon bathymetry remains scarcely available for most tropical islands despite its importance for navigation, resource assessment, spatial planning, and numerical hydrodynamic modeling. Hydrodynamic models are increasingly used for instance to und…

Area-based conservation is a popular strategy to address biodiversity decline. However, despite the identification of enabling conditions, many initiatives still fail at delivering positive outcomes for nature and people. This study examines how enabling …

Stegostoma tigrinum (Forster, 1781) undergoes an ontogenetic shift in color pattern, from striped (zebra) juveniles to spotted (leopard) adults. This shift in color pattern is potentially associated with a change in habitat. However, post-hatching juvenil…

In the context of the FAO's Small-Scale Fisheries (SSF) Voluntary Guidelines, inclusive management and participatory research approaches to SSF have been encouraged. To date such initiatives have been limited at the sub-national and national levels. The E…

In marine environments, plastic debris serves as a vector for pathogenic bacteria that can negatively impact marine fauna, including corals. The Saya de Malha and Nazareth Banks, located in the Indian Ocean, harbor an extensive area of coral reefs that ma…

The green algal genus Caulerpa is known for high levels of morphological plasticity and cryptic diversity, rendering morphology-based identifications unreliable. The present study assessed the Caulerpa species diversity in the Central Indo-Pacific realm (…

Coastal ecosystems, located at the intersection of land and sea, are subject to multiple humaninduced stressors that affect both terrestrial and marine environments. Among the 12 core priorities of global policies and biosphere monitoring efforts, eutroph…

In French Polynesia, the pearl oyster Pinctada margaritifera has allowed black pearl production since four decades. The production remains dependent on spat collections in atoll lagoons. Through their reproduction, the oysters of the natural stock are con…

Ocean acidification, driven by rising atmospheric carbon dioxide levels, has impacts on marine ecosystems. While elevated carbon dioxide concentrations have the potential to enhance Blue Carbon fixation and storage, the response of community photosynthesi…

Giant clams (Tridacninae) are a key component of coral reef ecosystems and a major economic, subsistence, and cultural resource for Pacific Island communities. In New Caledonia where stocks are declining but giant clams retain an emblematic status, coasta…

Simple Summary Coral reefs host both corals and macroalgae (seaweeds) that often live in close contact. While these interactions are well studied on degraded reefs, much less is known about how they occur in healthy reef systems. We surveyed macroalgal-co…

Numerous studies have been conducted on the benthic stages of Medusozoa in Reunion Island, but none on the pelagic stages. This study is the first to investigate the shallow waters of the island for the diversity, abundance, and spatio-temporal distributi…

To date less than 5% of shark species have nuclear reference genomes, despite next-generation sequencing advances. Particularly for threatened shark species, there is a lack of reliable genomes which are crucial in facilitating research and conservation a…

Arthrospira platensis extract is incorporated into sunscreen formulations for its beneficial and UV-protective properties on cultured human cells. However, its effects have not yet been assessed on non-target organisms such as endosymbiotic microalgae in …