Publication ENTROPIE dans HORIZON IRD

https://www.documentation.ird.fr/fdi/horizon-rss/UR250

27 févr. 2024
Context : Strandings are an important source of information for estimating marine mammal biodiversity, particularly in data-sparse ocean basins such as Oceania. Aims : Here, we report on knowledge acquired from 218 stranding events recorded in the waters …
14 févr. 2024
Micronekton, ubiquitous to all oceans plays a pivotal role in the trophic organisation and consti-tutes the food of most top predators. Due to the paucity of sampling, estimates of these organ-isms abundance and specie distribution is largely unknown. Suc…
6 févr. 2024
Objectives: New Caledonia, a former zero-COVID country, was confronted with a SARS-CoV-2 Delta variant outbreak in September 2021. We evaluate the relative contribution of vaccination, lockdown, and timing of interventions on healthcare burden.Methods: We…
6 févr. 2024
Seabirds transfer nutrients from the ocean to their nesting island, potentially altering nitrogen (N) cycling within adjacent terrestrial and marine ecosystems. Yet, the processes involved in seabird-N transfer along the land-sea continuum remain elusive.…
28 janv. 2024
L'acidification et le réchauffement des océans devraient avoir des conséquences dramatiques sur les récifs coralliens. Or, en Nouvelle-Calédonie, certains coraux résistent dans des conditions tout à fait inattendus.
28 janv. 2024
Les épidémies sont liées aux flux des populations, aux modes de vie, aux densités démographiques, aux vecteurs, mais aussi au climat. Cette découverte a permis d'améliorer la prévision et la gestion de certaines épidémies, notamment celle de méningite et …
11 janv. 2024
The oceanic waters of the Southwest Tropical Pacific occupy a vast region including multiple Pacific Island Countries. The state of these waters is determinant for fisheries and the blue economy. Ocean color remote sensing is the main tool to survey the v…
11 janv. 2024
Simple Summary Underwater mountains, or seamounts, are deep-sea habitats collectively forming an area as large as Europe. Yet, they are one of the least studied ecosystems on earth. Known for supporting rich marine life compared to surrounding deep-sea en…
11 janv. 2024
Coral Reef Islands (CRIs) support key colonies of tropical seabirds, whose long-term sustainability is under growing threat from climate change and small-scale, island-specific pressures such as invasive species or human disturbance. Unlike most compartme…
17 déc. 2023
The increasing threats to ecosystems and humans from marine plastic pollution require a comprehensive assessment. We present a plastisphere case study from Reunion Island, a remote oceanic island located in the Southwest Indian Ocean, polluted by plastics…
9 nov. 2023
The Millennium Coral Reef Mapping Project (MCRMP) aimed to map coral reefs worldwide at geomorphological thematic scales using Landsat satellite images at 30 m spatial resolution. The 5-level hierarchical classification scheme implemented by MCRMP identif…
9 nov. 2023
Dugongs (Dugong dugon) spend most of their lifetime either travelling between the sea surface and shallow seafloors where they forage seagrass beds or swimming just below the sea surface. Observations indicate that these movements are carried out with a v…
9 nov. 2023
The small giant clam, Tridacna maxima, is distributed from the Red Sea and East African coast to French Polynesia. Across this widespread Indo-Pacific range, T. maxima shows strong population structure, in agreement with its limited dispersal abilities. P…
9 nov. 2023
The ability of marine filter feeders to accumulate metals could help monitor the health of the marine environment. This study examined the concentration of metallic trace elements (MTE) in two marine sponges, Rhabdastrella globostellata and Hyrtios erectu…
9 nov. 2023
Mosquito-borne viruses are leading causes of morbidity and mortality in many parts of the world. In recent years, modelling studies have shown that climate change strongly influences vector-borne disease transmission, particularly rising temperatures. As …
17 oct. 2023
The project Science en herbe was funded by the MoU Dugong through a Small-Scale Funding Agreement, and developped to improve knowledge of seagrass meadow distribution and dugong foraging ecology in the southwest lagoon of New Caledonia, while promoting ci…
15 oct. 2023
Breeding birds recorded on Matthew and Hunter Islands in the tropical southwestern Pacific between 1973 and 2018 are summarised from a compilation of reports, for which various methods were used for counting seabirds. These methods included line transects…
5 oct. 2023
Plastic pollution is distributed patchily around the world's oceans. Likewise, marine organisms that are vulnerable to plastic ingestion or entanglement have uneven distributions. Understanding where wildlife encounters plastic is crucial for targeting re…
5 oct. 2023
Distant swells generated by storms in the high latitudes (>40 degrees) can impact islands and atolls of the Pacific Ocean far from their genesis locations. While common, they can also occasionally generate very high wave height (>5 m) at high period (>16 …
5 oct. 2023
La capacité des individus à se déplacer sur de longues distances peut profondément influencer la façon dont les espèces sont affectées par des processus menaçants localisés. Des études antérieures sur les schémas de déplacement des serpents de mer ont mis…
5 oct. 2023
Context: The coronavirus pandemic (COVID-19) has caused a major health crisis, requiring the implementation of various public health measures in order to slow the spread of the virus and reduce the associated mortality. However, the success of these measu…
5 oct. 2023
Simple Summary: The French Polynesian islands represent a unique insular system in the Pacific Ocean. Previous surveys of the marine flora of French Polynesia were mostly established on traditional morphology-based taxonomy. DNA barcoding allowed us to pr…
21 sept. 2023
Recruitment is a critical component in the dynamics of coral assemblages, and a key question is to determine the degree to which spatial heterogeneity of adults is influenced by pre -vs. post-settlement processes. We analyzed the density of juvenile and a…
21 sept. 2023
Context. Invasive feral cats strongly threaten native fauna on islands worldwide. The impact of feral cat populations is assumed to be higher in the presence of introduced rodents and may also vary according to an island's rodent species assemblage. Aims.…
21 sept. 2023
Widely distributed, broadcast-spawning Diadema sea urchins have been used as model invertebrate species for studying the zoogeography of the tropical Indo-Pacific. So far, the Indo-Malay archipelago, a wide and geographically complex maritime region exten…
21 sept. 2023
A global survey of coral reefs reveals that overfishing is driving resident shark species toward extinction, causing diversity deficits in reef elasmobranch (shark and ray) assemblages. Our specieslevel analysis revealed global declines of 60 to 73% for f…
18 sept. 2023
In applied ecology, numerical biophysical modelling allows running numerous simulations of spatial connectivity between source and destination locations. To characterize population connectivity, larval dispersal and resulting connectivity matrices can be…
24 août 2023
Size-based indicators are appropriate for monitoring status and guiding management of multi-species, multi-gear fisheries, such as coral reef fisheries. From May 2018 to April 2019, size distribution and composition of coral reef fish catches were monitor…
24 août 2023
Black pearl farming is the second source of French Polynesia income after tourism, and Gambier Islands are the main farming sites. Gambier main lagoon contains several sub-lagoons critical for pearl oyster rearing and spat collecting (SC). The Rikitea lag…