Publication ENTROPIE dans HORIZON IRD

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

11 juil. 2022
Acacia spirorbis subsp. spirorbis Labill. is a widespread tree legume in New Caledonia that establishes mutual symbioses with both N2-fixing rhizobia and ectomycorrhizal (ECM) fungi. Moreover, A. spirorbis is able to naturally grow on ultramafic soils, ch…
11 juil. 2022
Communicating new scientific discoveries is key to human progress. Yet, this endeavor has been increasingly hindered by monetary restrictions that restrain scientists from publishing their findings and accessing other scientists' reports. This process is …
6 juil. 2022
Contexte et objectifs. Nous présentons une série de cas d'attaques de requins survenues en Nouvelle-Calédonie, destinée à proposer aux usagers du milieu marin concernés et aux autorités en charge de la sécurité du public un état des lieux de cette problém…
6 juil. 2022
La mer de Corail héberge une grande partie de la population mondiale de Puffins du Pacifique Ardenna pacifica ; les quelques dizaines d'îlots coralliens du lagon sud-ouest de la Nouvelle-Calédonie en abriteraient 470 000 couples reproducteurs. La Nouvelle…
6 juil. 2022
La population d'orques fréquentant la mer de Corail est mal connue. Les objectifs de ce travail sont de présenter les observations d'orques faites ces trois dernières décennies au large de la Nouvelle-Calédonie, d'examiner le pattern temporel d'occurrence…
6 juil. 2022
Les premiers signalements d'otaries à fourrure de Nouvelle-Zélande Arctocephalus forsteri en Nouvelle-Calédonie dans les années 1970 ont été vus comme le fait d'individus "égarés" ou "vagrants". Les observations d'otaries à fourrure rapportées dans la pre…
30 juin 2022
Madagascar is a marine biodiversity hotspot. A recent checklist recorded 1689 marine or transitional water fish species, 2.5% being endemic. To date, studies in this country were mostly focused on adult fishes using morphological-based identification. The…
30 juin 2022
Ecological surveys of coral reefs mostly rely on visual data collected by human observers. Although new monitoring tools are emerging, their specific advantages should be identified to optimise their simultaneous use. Based on the goodness-of-fit of linea…
30 juin 2022
Nowadays, ecological restoration is considered the best solution for the rehabilitation of mining-degraded areas, particularly when it concerns valuable ecosystems. This is the case in New Caledonia, a hot spot of biodiversity, with 82% of endemic plant s…
30 juin 2022
Extreme reef environments have become useful natural laboratories to investigate physiological specificities of species chronically exposed to future-like climatic conditions. The lagoon of Bourake in New Caledonia (21 degrees 56 ' 56.16 ' S; 125 degrees …
30 juin 2022
Sponges are major components of benthic communities across the world and have been identified as potential "winners" on coral reefs in the face of global climate change as result of their tolerance to ocean warming and acidification (OA). Previous studies…
30 juin 2022
Among animal species, the songs of male humpback whales (Megaptera novaeangliae) are a rare example of social learning between entire populations. Understanding fine-scale similarity in song patterns and structural features will better clarify how accurat…
2 juin 2022
Oyster farming for black pearl production is central in French Polynesia. It is the second source of national income and provides substantial job opportunities, notably in remote atolls. However, this sector has been undermined by successive crises, such …
2 juin 2022
Study region: Six watersheds of the main island of New Caledonia.& nbsp;Study focus: In the context of a projected reduction of extreme precipitation events by ~ 20% by 2100 combined to large land cover variability, a distributed hydrological approach was…
2 juin 2022
Increasing speed and magnitude of global change threaten the world's biodiversity and particularly coral reef fishes. A better understanding of large-scale patterns and processes on coral reefs is essential to prevent fish biodiversity decline but it requ…
2 juin 2022
Knowledge of marine fish diversity remains largely incomplete in the Con Dao Archipelago, the oldest marine-protected area in Vietnam. Previous investigations of diversity established a species checklist for Con Dao but did not specifically target pre-set…
2 juin 2022
Mobile marine species display complex and nonstationary habitat use patterns that require understanding to design effective management measures. In this study, the spatio-temporal habitat use dynamics of the vulnerable dugong (Dugong dugon) were modelled …
2 juin 2022
Ciguatera poisoning (CP) results from the consumption of coral reef fish or marine invertebrates contaminated with potent marine polyether compounds, namely ciguatoxins. In French Polynesia, 220 fish specimens belonging to parrotfish (Chlorurus microrhino…
2 juin 2022
There is a growing interest in elucidating the biogeographical processes underlying biodiversity patterns of seaweeds, with recent studies largely focusing on red and brown macroalgae. This study focuses on the siphonous green algal family Udoteaceae, whi…
2 juin 2022
Outbreaks of crown-of-thorns starfish Acanthaster spp. (COTS) are among the most severe local threats to IndoPacific coral reefs. Despite intensive research, the factors triggering outbreaks remain unclear, though could involve enhanced COTS larval fitnes…
2 juin 2022
Over the past decade, coral bleaching events have continued to recur and intensify. During bleaching, corals expel millions of their symbionts, depriving the host from its main food source. One mechanism used by corals to resist bleaching consists in expl…
2 juin 2022
Reliable and efficient techniques are urgently needed to monitor elasmobranch populations that face increasing threats worldwide. Aerial video-surveys provide precise and verifiable observations for the rapid assessment of species distribution and abundan…
2 juin 2022
To assess the photophysiological capacity of the recently described Ulva batuffolosa to form blooms in coral reefs, we monitored its biomass and photophysiological capacity with pulse amplitude modulated (PAM) fluorometry over a year period on a coastal b…
3 mai 2022
Integrating bioenergetic models and global coral reef fish community surveys, the authors show that there are functional trade-offs, meaning that no community can maximize all functions, and that dominant species underpin local functions, but their identi…
3 mai 2022
Pacific Ocean tuna is among the most-consumed seafood products but contains relatively high levels of the neurotoxin methylmercury. Limited observations suggest tuna mercury levels vary in space and time, yet the drivers are not well understood. Here, we …
3 mai 2022
Analyses of genetic diversity can shed light on both the origins of biodiversity hotspots, as well as the conservation status of species that are impacted by human activities. With these objectives, we assembled a genomic dataset of 14,935 single nucleoti…
3 mai 2022
The ongoing decline of large marine vertebrates must be urgently mitigated, particularly under increasing levels of climate change and other anthropogenic pressures. However, characterizing the connectivity among populations remains one of the greatest ch…
3 mai 2022
Cats (Felis catus) introduced on islands have strong impacts on biodiversity, and the main conservation actions to protect native fauna is cat eradication or control (i.e., regular culling). The situation is more complicated on inhabited islands because u…
3 mai 2022
Aim The ecosystem functions and services of coral reefs are critical for coastal communities worldwide. Due to conservation resource limitation, species need to be prioritized to protect desirable properties of biodiversity, such as functional diversity (…
3 mai 2022
Coral reefs provide a range of important services to humanity, which are underpinned by community-level ecological processes such as coral calcification. Estimating these processes relies on our knowledge of individual physiological rates and species-spec…