Disturbance and the (surprising?) role of ecosystem engineering in explaining spatial patterns of non-native plant establishmentMeredith Root-Bernstein, Cesar Muñoz & Juan Armesto
The Intermediate Disturbance Hypothesis is widely considered to be wrong but is rarely tested against alternative hypotheses. It predicts that soil disturbances and herbivory have identical impacts on species richness via identical mechanisms (reduction in biomass and in competition). An alternative hypothesis is that the specific traits of disturbance agents (small mammals) and plants differentially affects richness or abundance of different plant groups. We tested these hypotheses on a degu (Octodon degus) colony in central...
Humans have the amazing ability to learn the dynamics of the body and environment to develop motor skills. Traditional motor studies using arm reaching paradigms have viewed this ability as the process of ‘internal model adaptation’. However, the behaviors have not been fully explored in the case when reaches fail to attain the intended target. Here we examined human reaching under two force fields types; one that induces failures (i.e., target errors), and the other...
Binding of inorganic and organic cations by p-sulfonatocalixarene in water: a thermodynamic studyChristine Bonal, Yaël Israëli, Jean-Pierre Morel & Nicole Morel-Desrosiers
We report a microcalorimetry study of the association of various inorganic and organic cations with p-sulfonatocalixarene at 298.15 K. First, we have studied the electrostatic attraction between host 1 and seven rare-earth-metal cations representative of the whole lanthanide series (La3+, Nd3+, Sm3+, Eu3+
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...
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...
Age-specific fecundity under pathogenic threat in an insect: terminal investment versus reproductive restraintCharly 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...
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 phenologyClaire 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...
Introduzione critica al cipro sillabico, risorse elettroniche e bibliografia.
Introduzione critica al cipro minoico, risorse elettroniche e bibliografia.
Computational and Experimental Investigations of Supramolecular Assemblies of p-Sulfonatocalixarene Organized by Weak ForcesA. 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-sulfonatocalixarene 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...
Thermodynamics of the Complexation of the p-Sulfonatocalixarene with Simple Model Guests in Water: a Microcalorimetric StudyFlorent Perret, Jean-Pierre Morel & Nicole Morel-Desrosiers
(2003). Thermodynamics of the Complexation of the p-Sulfonatocalixarene 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/Nathalie Douteau-Guével, Florent Perret, Anthony W. Coleman, Jean-Pierre Morel & Nicole Morel-Desrosiers
The water soluble -sulfonatocalixarenes ( = 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
This dataset contains calibrated Cassini-RPWS-HFR Jupiter fly-by data from 6 months of Jupiter encounter: 2000-275 (Oct 1st) 00:00 to 2001-090 (Mar 31st) 24:00. The spectral range covers 3.5 kHz to 16 MHz.
Des mammouths sous l’autoroute. L’exploitation des données environnementales et leurs apports pour diagnostiquer et étudier les sites paléolithiques : l’exemple des fouilles du contournement Ouest de Strasbourg (Bas-Rhin)Sylvain Griselin, François Bachellerie, Olivier Moine, Nathalie Schneider, Patrice Wuscher, Noémie Sévêque, Charlotte Leduc, Héloïse Koehler & Éric Boës
Bien que l’Alsace soit connue pour son potentiel archéologique paléolithique depuis le XIXe siècle, ce n’est que récemment que la recherche en Préhistoire ancienne connaît un nouvel élan. À l’occasion des diagnostics archéologiques menés préalablement au projet autoroutier du Contournement Ouest de Strasbourg, des sondages profonds ont été réalisés. Sept indices de site du Paléolithique moyen ont été identifiés, dont trois ont fait l’objet de fouilles. Les travaux menés sur les séquences lœssiques observées sur...
Agroecosystem diversification with legumes or non-legumes improves differently soil fertility according to soil typeMarie Sauvadet, Jean Trap, Gaëlle Damour, Claude Plassard, Karel Van Den Meersche, Raphaël Achard, Clémentine Allinne, Patrice Autfray, Isabelle Bertrand, Eric Blanchart, Péninna Deberdt, Séguy Enock, Jean-Daniel Essobo, Grégoire Freschet, Mickaël Hedde, Elias De Melo Virginio Filho, Bodovololona Rabary, Miora Rakotoarivelo, Richard Randriamanantsoa, Béatrice Rhino, Aude Ripoche, Elisabeth Rosalie, Stéphane Saj, Thierry Becquer, Philippe Tixier … & Jean-Michel Harmand
Plant diversification through crop rotation or agroforestry is a promising way to improve sustainability of agroecosystems. Nonetheless, criteria to select the most suitable plant communities for agroecosystems diversification facing contrasting environmental constraints need to be refined. Here, we compared the impacts of 24 different plant communities on soil fertility across six tropical agroecosystems: either on highly weathered Ferralsols, with strong P limitation, or on partially weathered soils derived from volcanic material, with major N limitation....
Behavioral interactions between bacterivorous nematodes and predatory bacteria in a synthetic communityNicola Mayrhofer, Gregory J. Velicer, Kaitlin A. Schaal & Marie Vasse
Theory and empirical studies in metazoans predict that apex predators should shape the behavior and ecology of mesopredators and prey at lower trophic levels. Despite the ecological importance of microbial communities, few studies of predatory microbes examine such behavioral res-ponses and the multiplicity of trophic interactions. Here, we sought to assemble a three-level microbial food chain and to test for behavioral interactions between the predatory nematode Caenorhabditis elegans and the predatory social bacterium Myxococcus xanthus...
French National Centre for Scientific Research57
University of Paris-Saclay6
Laboratory of Space Studies and Instrumentation in Astrophysics5
University of Orléans4
Versailles Saint-Quentin-en-Yvelines University3
Laboratoire d’Astrophysique de Marseille2
PSL Research University2
University of Lyon System2