Publication ENTROPIE dans HORIZON IRD

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

2 Jun 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 Jun 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 Jun 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 Jun 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 Jun 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 Jun 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 Jun 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 Jun 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 Jun 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 Jun 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 Jun 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 May 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 May 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 May 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 May 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 May 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 May 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 May 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…
3 May 2022
In small islands, the potential for new coastal activities and management options are often spatially limited. To reduce dependence on external factors and increase the resilience of populations to global changes and fluctuations in international markets,…
3 May 2022
We investigated the suitability of Acacia spirorbis Labill., a tropical ectomycorrhizal (ECM) tree, as a nurse plant to improve the growth of Tristaniopsis calobuxus Brongn. & Gris seedlings for the restoration of nickel mines in New Caledonia. Rehabilita…
1 May 2022
Le gouvernement de la Nouvelle-Calédonie souhaite développer le tourisme dans le parc naturel de la mer de Corail. Le but du présent travail est de présenter les activités envisagées par les opérateurs touristiques dans le parc, en se basant sur les compt…
1 May 2022
Les îlots des atolls coralliens du parc naturel de la mer de Corail comptent parmi les derniers endroits de la zone intertropicale abritant des colonies nombreuses d'une diversité remarquable d'oiseaux marins. Ce sont aussi des sites de ponte pour la tort…
5 Apr 2022
Tropical inter-reefs represent a vast overlooked marine ecosystem that occurs between coral reefs and across the shelf. We deployed 60 baited remote underwater video stations (BRUVS) in New Caledonia to study inter-reef fish assemblages and habitats in th…
5 Apr 2022
Outbreaks of the corallivorous starfish Acanthaster cf. solaris (COTS) are not fully understood, especially in the shallowest areas behind the reef crests where limited COTS impacts are often reported. Here, we investigated the outbreak occurrence and com…
5 Apr 2022
Coastal marine ecosystems are currently being exposed to climate change at a much faster rate than many other ecosystems, with coastal species being exposed to multiple stressors. Cephalopod mollusks play a pivotal role in marine trophic webs, and most ar…
5 Apr 2022
Tropical cyclone (TC) internal dynamics have emerged over recent decades as a key to understand their intensity variations, but they are difficult to observe because they are sporadic, multiscale, and occur in areas of very strong wind gradients. The pres…
5 Apr 2022
Ocean acidification (OA) is postulated to affect the physiology, behavior, and life-history of marine species, but potential for acclimation or adaptation to elevated pCO(2) in wild populations remains largely untested. We measured brain transcriptomes of…
5 Apr 2022
Ulva is a green macroalgal genus with rich species diversity and worldwide distribution. While current knowledge on Ulva diversity focuses on temperate regions, genetic and morphological data in tropical and subtropical areas are scarce and the species ri…
5 Apr 2022
Tropical cyclones (TCs) can have profound effects on the dynamics of forest vegetation that need to be better understood. Here, we analysed changes in forest vegetation induced by TCs using the normalized difference vegetation index (NDVI). We used an acc…
5 Apr 2022
Maintaining key functions of coral reefs is vital for the persistence of these ecosystems as well as for securing the goods and services that they provide in the Anthropocene. Underwater photogrammetry by Structure from Motion (SfM) allows the quantificat…