56 Works

Expérimentation pour un observatoire régional de la vulnérabilité aux risques côtiers en Bretagne. Projets OSIRISC et OSIRISC+

Manuelle Philippe, Alain Hénaff, Thibaud Lami, Iwan Le Berre, Catherine MEUR-FEREC, Nicolas Le Dantec, Pauline Letortu, Elisabeth Guillou, Mathias ROUAN & Laurence DAVID

Moorea Biocode

Neil Davies
The core goal of the Moorea Biocode Project (MBP) is to genetically barcode every non-microbial species on Moorea. We will thus create a professionally produced, verifiable (vouchered) All Taxa Biotic Inventory (ATBI) of Moorea (Output 1), together with the informatics services needed for ATBI and biocode-enabled research in Model Ecosystems (Outcome 2). We will also design a long-term plan (business model) to ensure the financial self-sustainability of biocode services, and carry out proof of concept...

Cassini/RPWS/HFR Electrical Antenna Calibration. Saturn Inbound Update

Baptiste Cecconi, Philippe Zarka, William Kurth & Donald A Gurnett
This document describes the Cassini/RPWS/HFR Electrical Antenna Calibration update after the Saturn Inbound trajectory measurements.

African elephants can detect water from natural and artificial sources via olfactory cues

Matthew Wood, Simon Chamaillé-Jammes, Almuth Hammerbacher & Adrian Shrader
Water is vital for mammals. Yet, as ephemeral sources can be difficult to find, it raises the question, how do mammals locate water? Elephants (Loxodonta africana) are water-dependent herbivores that possess exceptional olfactory capabilities, and it has been suggested that they may locate water via smell. However, there is no evidence to support this claim. To explore this, we performed two olfactory choice experiments with semi-tame elephants. In the first, we tested whether elephants could...

JSON Implementation of Time-Frequency Radio Catalogues: TFCat

Baptiste Cecconi, Xavier Bonnin & Alan Loh
TFCat (Time-Frequency Catalogue) is a data interchange format based on JSON. It defines several types of JSON objects and the manner in which they are combined to represent data about time-frequency features of a time spectrogram (a.k.a. dynamic spectrum), their properties, and their temporal and spectral extents.

SRN NDA Routine Jupiter EDR CDF Dataset Specification

Baptiste Cecconi, Andrée Coffre, Alan Loh, Laurent Denis & Laurent Lamy

Canine histiocytic sarcoma genome-wide association study

Benoit Hedan
Histiocytic sarcoma (HS) is a rare but aggressive cancer in both humans and dogs. The spontaneous canine model, which has clinical, epidemiological, and histological similarities with human HS and specific breed predispositions, provides a unique opportunity to unravel the genetic basis of this cancer. In this study, we aimed to identify germline risk factors associated with the development of HS in canine-predisposed breeds. We used a methodology that combined several genome-wide association studies in a...

Age-specific fecundity under pathogenic threat in an insect: terminal investment versus reproductive restraint

Charly Jehan, Camille Sabarly, Thierry Rigaud & Yannick Moret
The terminal investment hypothesis predicts that as an organism’s prospects for survival decrease, through age or when exposed to a pathogenic infection, it will invest more in reproduction, which should trade-off against somatic maintenance (including immunity) and therefore future survival. Attempts to test this hypothesis have produced mixed results, which, in addition, mainly rely on the assessment of changes in reproductive effort and often overlooking its impact on somatic defences and survival. Alternatively, animals may...

Biodiversity-productivity relationships are key to nature-based climate solutions

Akira Mori, Laura Dee, Andrew Gonzalez, Haruka Ohashi, Jane Cowles, Alexandra Wright, Michel Loreau, Yann Hautier, Tim Newbold, Peter Reich, Tetsuya Matsui, Wataru Takeuchi, Kei-Ichi Okada, Rupert Seidl & Forest Isbell
The global impacts of biodiversity loss and climate change are interlinked but the feedbacks between them are rarely assessed. Areas with greater tree diversity tend to be more productive, providing a greater carbon sink, and biodiversity loss could reduce these natural C sinks. Here, we quantify how tree and shrub species richness could affect biomass production at biome, national and regional scales. We find that greenhouse gas mitigation could help maintain tree diversity and thereby...

Age-related breeding success in little penguins: A result of selection and ontogenetic changes in foraging and phenology

Claire Saraux & André Chiaradia
Reproductive performance typically improves with age, reaching a plateau at middle age and subsequently declining in older age classes (senescing individuals). Three potential non-exclusive mechanisms can explain the improvement in reproductive performance with age: (1) selection (poor quality individuals are removed from the population with increasing age), (2) constraint (individual efficiency increases through experience) and (3) restraint (reproductive investment increases with age as the residual reproductive value decreases). While all three mechanisms received strong empirical...

Echolocating toothed whales use ultra-fast echo-kinetic responses to track evasive prey

Heather Vance, Peter Madsen, Natacha Aguilar De Soto, Danuta Wisniewska, Michael Ladegaard, Sascha Hooker & Mark Johnson
Visual predators rely on fast-acting optokinetic responses to track and capture agile prey. Most toothed whales, however, rely on echolocation for hunting and have converged on biosonar clicking rates reaching 500/s during prey pu rsuits. If echoes are processed on a click by click basis, as assumed, neural responses 100x faster than those in vision are required to keep pace with this information flow. Using high resolution bio-logging of wild predator prey interactions we show...

IDOC Platform

Marian Douspis & Gilles Poulleau

Role of microorganisms in the carbon cycling of peatlands

Juanita Mora-Gómez, Qian Li, Fabien Leroy, Sébastien Gogo & Fatima Laggoun

Coordination compounds as antioxidants: activity evaluation by combining first-principle calculations and solid-state NMR

Arlette Richaud, Pierre Florian & Méndez Francisco

Portal for OMEGA data_cubes

John Carter

Targeting acetylcholine receptors to enhance immunity to infection

William Horsnell, Luke B. Roberts, Corinna Corinna Schnoeller, Matthew Darby, Claire Mackowiak, Delphine Sedda, Valerie Quesniaux, Bernhard Ryffel, Rachel Vaux, Rita Berkachy, Kleoniki Gounaris & Murray E. Selkirk

Numerical simulation of singular conservation laws and related applications

Guoxian Chen & Magali Ribot

Mnamon: Il cipro minoico

Anna Cannavò
Introduzione critica al cipro minoico, risorse elettroniche e bibliografia.

Mnamon: Il cipro sillabico

Anna Cannavò
Introduzione critica al cipro sillabico, risorse elettroniche e bibliografia.

Thermodynamics of the Complexation of the p-Sulfonatocalix[4]arene with Simple Model Guests in Water: a Microcalorimetric Study

Florent Perret, Jean-Pierre Morel & Nicole Morel-Desrosiers
(2003). Thermodynamics of the Complexation of the p-Sulfonatocalix[4]arene with Simple Model Guests in Water: a Microcalorimetric Study. Supramolecular Chemistry: Vol. 15, No. 3, pp. 199-206.

Binding of dipeptides and tripeptides containing lysine or arginine by p-sulfonatocalixarenes in water: NMR and microcalorimetric studiesElectronic supplementary information (ESI) available: chemical shifts experienced by different protons of KK, RR, KKK or RRR in the presence of increasing amounts of 14 or 16; heat effects observed upon titration of 14, 16 or 18 by KK, RR, KKK or RRR; COSY and ROESY 2D 1H NMR spectra for 14 complexed with KK or RR. See http://www.rsc.org/suppdata/p2/b1/b109553f/

Florent Perret, Jean-Pierre Morel, Nicole Morel-Desrosiers, Nathalie Douteau-Guével & Anthony W. Coleman
The water soluble -sulfonatocalix[]arenes ( = 4, 6 and 8) (, and ) show glycosylaminoglycan (GAG) mimicry, being both active antithrombotics and modulators of lysyloxidase activity. In order to understand how these synthetic receptors interact with GAG receptor sequences, we have undertaken a study to thermodynami

Computational and Experimental Investigations of Supramolecular Assemblies of p-Sulfonatocalix[4]arene Organized by Weak Forces

A. Ghoufi, L. Pison, J. P. Morel, N. Morel-Desrosiers, C. Bonal & P. Malfreyt
We report the study of the supramolecular assemblies formed by the incorporation of quaternary ammonium cations such as Me4N+ or Et4N+ into host−guest assemblies with p-sulfonatocalix[4]arene in the presence of a lanthanide(III) cation in water. We use microcalorimetry to characterize the formation of these supramolecular assemblies. We obtain a molecular description of these assemblies by performing molecular dynamics simulations over a very large period of time. The structures of these supramolecular complexes have been determined...

Potentiel bioarchéologique des micro-fossiles non-polliniques en archéologie préventive

Delphine Barbier‐Pain, Yannick Miras, Hélène Silhouette, Dominique Frère & Bastien Dubuis
Au travers de deux cas d’étude issus de l’archéologie préventive, cet article a pour objectif d’évaluer le potentiel bioarchéologique des micro-fossiles non-polliniques (MNP). Ils correspondent à des formes de résistance et de dissémination issus des cinq règnes du vivant. Associés à l’analyse des grains de pollen et des spores de végétaux, les premiers résultats obtenus sur les sites de Villeneuve-sur-Lot et de Lavau démontrent leur intérêt tant les informations qu’ils peuvent apporter sont nombreuses sur...

Data from: The stochastic dynamics of early epidemics: probability of establishment, initial growth rate, and infection cluster size at first detection

Peter Czuppon, Emmanuel Schertzer, François Blanquart & Florence Débarre
Emerging epidemics and local infection clusters are initially prone to stochastic effects that can substantially impact the epidemic trajectory. While numerous studies are devoted to the deterministic regime of an established epidemic, mathematical descriptions of the initial phase of epidemic growth are comparatively rarer. Here, we review existing mathematical results on the epidemic size over time, and derive new results to elucidate the early dynamics of an infection cluster started by a single infected individual....

Rapid divergent evolution of an annual plant across a latitudinal gradient revealed by seed resurrection

Pierre-Olivier Cheptou
Global change is expected to drive short-term evolution of natural populations. However, it remains unclear whether different populations are changing in unison. Here, we study contemporary evolution of growth-related and reproductive traits of three populations of Cyanus segetum face to warming and pollinator decline across a latitudinal gradient in France. We resurrected stored seeds sampled up to 24 years apart from northern, central-western, and southern populations and conducted an in situ common-garden experiment. To disentangle...

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  • 2021
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  • French National Centre for Scientific Research
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  • Paris Observatory
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