Publications ENTROPIE IRD

The atlas presented in this work analyses the challenges of climate change for agri-food systems, first through the lens of (1) greenhouse gas emissions, then (2) the impacts of climate change on the land sector, followed by (3) the ques- tion of the e…

Coral reefs are among the most diverse and productive ecosystems on the planet, providing goods and services to millions of people. Yet, they are threatened by a combination of natural and anthropogenic disturbances, which are increasing in both frequency…

Giant clams (Tridacna maxima) are abundant in French Polynesia semi-closed atolls, but the sustainability of the ecosystem services they provide has been challenged by recent mass bleaching events. Being able to accurately anticipate the risks of bleachin…

Toothed whale depredation of fish caught on fishing gear raises socioeconomic and conservation concerns. It can lead to substantial losses for fishers and impacts on depredating species, but effective solutions remain limited. In this study, we implemente…

Significant efforts have been made to describe the diversity of the sponge class Homoscleromorpha across various oceanic regions, yet the Tropical Eastern Atlantic remains largely unexplored. The insular nature and volcanic origin of the Cape Verde archip…

Small-scale fisheries across the Pacific, particularly in Vanuatu, are multi-species, multi-geared, and span multiple coastal habitats. This diversity and variability extends into associated trade and distribution systems that move fish from relatively fe…

Coral reef monitoring often relies on indicator species to reflect ecological conditions across habitats, yet existing identification methods such as IndVal and TWINSPAN vary widely in the number and identity of the taxa they select. Here, we compare thes…

Extreme climatic events and gradual climate change are increasingly anticipated to interact and reshape ecological communities. However, the combined effects of ocean warming, acidification and marine heatwaves on host-associated microbial communities and…

Ocean warming is driving species range extensions into cooler regions. The direct physiological influence of warming on species performance can accelerate such extensions into novel ecosystems; however, indirect effects of invader-resident interactions in…

Marine Protected Areas (MPAs) are a cornerstone of global marine biodiversity conservation strategies, yet their effectiveness remains highly variable, context-dependent, and often contested. While various methods can be used to assess the effectiveness o…

Dengue virus (DENV) is a major public health concern in tropical and subtropical regions, including the Pacific. Temperature is recognised as a major driver of transmission under climate change. Understanding how higher temperatures may alter DENV transmi…

Marine megafauna species are affected by a wide range of anthropogenic threats. To evaluate the risk of such threats, species' vulnerability to each threatmust first be determined. We build on the existing threats classification scheme and ranking system …

Micronekton are mid-trophic marine organisms characterized by a size range of 2 to 20 cm, gathering a wide diversity of taxa (crustaceans, fish, molluscs). They are responsible for an important active carbon export to the deep ocean because of their diel …

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 …