Publications ENTROPIE IRD

Island ecosystems, characterized by isolation and vulnerability, are subject to natural and human-induced pressures. Rapid and effective biodiversity monitoring is crucial for tracking these impacts and adapting conservation efforts. This study focuses on…

BackgroundIn the context of global change, coral reefs and their associated biodiversity are under threat. Several conservation strategies using population genetics have been explored to protect them. However, some components of this ecosystem are underst…

This study aims to identify the petrel species affected by artificial light pollution in New Caledonia, describe the spatial and temporal patterns of light-induced groundings, and infer the factors involved. The study took place across Grande Terre (New C…

Mesophotic coral ecosystems (MCEs) have gained considerable attention this last decade but the paucity of knowledge on these ecosystems is pronounced, particularly in the Southwestern Indian Ocean region. We explore the spatial variation in macro-benthic …

Variation in reproductive success is a fundamental prerequisite for sexual selection to act upon a trait. Assessing such variation is crucial in understanding a species' mating system and offers insights into population growth. Parentage analyses in cetac…

AimIt has been hypothesised that niche breadth decreases with richness due to interactions, such as competition, forcing species to specialise. This hypothesis has been tested at the community-level using species-level niche breadth estimates. However, ev…

Porites corals are vital components of tropical reef ecosystems worldwide, serving as ecosystem engineers and hubs of biodiversity in shallow water coral reefs. Despite their ecological significance and the widespread use of Porites spp. as models for res…

Euphausiids (krill) are globally significant zooplankton prey for many commercially important or endangered predator species. In the productive upwelling system of the Northern California Current (NCC), two krill species, Euphausia pacifica and Thysanoess…

Reunion Island is in the South-West Indian Ocean (SWIO), where all freshwater fish species are diadromous. The ecological status assessments of freshwater in watersheds have revealed a continuing deterioration in these fish populations due to anthropic pr…

Micronekton are the mid-trophic level of the ecosystem and contribute to active carbon export to the deep ocean through diel vertical migrations. Better characterization of micronekton functional groups depending on relationships to environmental variable…

The regular and consistent monitoring of marine ecosystems and fish communities is becoming more and more crucial due to increasing human pressures. To this end, underwater camera technology has become a major tool to collect an important amount of marine…

The Southwest Pacific region is of great importance to global climate variability, but instrumental climate observations before the 1980s lack in numbers and quality. Despite efforts in complementing instrumental records with proxy sea surface temperature…

Crustose coralline algae (CCA) play a critical role in the ecology and resilience of coral reefs by contributing to reef carbonate production and facilitating coral recruitment. However, little is known about their rates of in situ growth and calcificati…

One crucial interaction for the health of fish communities in coral reefs is performed by cleaner fish by removing ectoparasites from the body of other fish, so-called clients. Studying the underlying mechanisms of this behaviour is essential to understan…

The amount of ocean protected from fishing and other human impacts has often been used as a metric of conservation progress. However, protection efforts have highly variable outcomes that depend on local conditions, which makes it difficult to quantify wh…

This study synthesizes various research initiatives conducted within the coral reef systems of the Greater Suva Urban Area (GSUA), Fiji, with the aim of providing a comprehensive understanding of the state of knowledge at these urban reef systems. The lit…

Ocean acidification (OA) is one of the main threats to marine habitats likely causing changes in biodiversity and ecosystem function within this century. Ocean acidification might affect various physiological parameters at different stages of the animal l…

The resilience of Moorea Island's coral reefs has been extensively discussed. In this debate, and despite their greater exposure to anthropogenic disturbances, shallow reef flats have often been overlooked compared to oceanic forereefs. This study assesse…

El Nino typically induces cooling in the Southwest Pacific Ocean during austral summers, usually leading to decreased marine heatwave frequency and severity. However, the 2016 extreme El Nino unexpectedly coincided with the longest and most extensive mari…

Aim Ecological state shifts that alter the structure and function of entire ecosystems are a concerning consequence of human impact. Yet, when, where and why discrete ecological states emerge remains difficult to predict and monitor, especially in high-di…

1. The dugong population of New Caledonia was recently assessed as endangered by the IUCN due to its low genetic diversity, its limited number of mature individuals and the continuing threats from poaching, collisions, incidental capture and seagrass degr…

Early-life stages play a key role in the dynamics of bipartite life cycle marine fish populations. Difficult to monitor, observations of these stages are often scattered in space and time. While Mediterranean coastlines have often been surveyed, no effort…

Sea Surface Temperature (SST) maps are necessary for managing marine resources in a climate change context, but are lacking for most of the 598 world's atolls. We assessed the feasibility of using the Landsat-8 (L8) satellite to infer SST maps for four Fr…

The gametogenic cycle in broadcast spawning corals takes several months, with oogenesis culminating in synchronized maturation when seawater temperatures rise. Temperature is known for governing reproductive seasonality, yet little is known about how mult…

Accelerating rate of human impact and environmental change severely affects marine biodiversity and increases the urgency to implement the Convention on Biological Diversity (CBD) 30x30 plan for conserving 30% of sea areas by 2030. However, area-based con…

Oceanic eddies are recognized as pivotal components in marine ecosystems, believed to concentrate a wide range of marine life spanning from phytoplankton to top predators. Previous studies have posited that marine predators are drawn to these eddies due t…

Large-scale disturbances and local stressors, most notably bleaching events, sedimentation, and overfishing, impact coral reefs around Madagascar. To enhance reef resilience, managers have established several marine protected areas (MPAs) since 1966. Here…

Spat collection of the pearl oyster Pinctada margaritifera in atoll lagoons of French Polynesia is the fundamental sustain of black pearl farming. Spat collection has always yielded variable results in space and time, but obvious signs of steady decreases…

The Health Impacts of Artificial Reef Advancement (HIARA; in the Malagasy language, "together") study cohort was set up in December 2022 to assess the economic and nutritional importance of seafood for the coastal Malagasy population living along the Bay …