Auteurs, date et publication :

Auteurs Jean-François Humbert , Kamel Soudani , Gabriel Hmimina , Louise Audebert , Stéphane Buttigieg , Patrice Chatellier , Simon Chollet , Beatriz Decencière , François Derkx , Catherine Freissinet , others

Date : 2025


Catégorie(s)

#CNRS #Ecotron IleDeFrance #ENS #PLANAQUA

Auteurs, date et publication :

Auteurs Christian Pichot , Nicolas Beudez , Cécile Callou , André Chanzy , Alyssa Clavreul , Philippe Clastre , Benjamin Jaillet , François Lafolie , Jean-François Le Galliard , Chloé Martin , Florent Massol , Damien Maurice , Nicolas Moitrier , Ghislaine Monet , Hélène Raynal , Antoine Schellenberger , Rachid Yahiaoui

Date : 2022


Catégorie(s)

#CNRS #Ecotron IleDeFrance #ENS

Auteurs, date et publication :

Auteurs Meryem Mojtahid , Pauline Depuydt , Aurélia Mouret , Fatine Rihani , Sandrine Le Houedec , Sarah Fiorini , Simon Chollet , Florent Massol , Francis Dohou , Helena L. Filipsson , Wim Boer , Gert-Jan Reichart , Sophie Quinchard , Carole La , Christine Barras

Date : 2022


Catégorie(s)

#CNRS #Ecotron IleDeFrance #ENS #PLANAQUA

Résumé

Pyrogenic carbon (PyC), the product of incomplete biomass combustion, is a key component of soil organic carbon (SOC) because it can persist in soils for centuries to millennia. Quantifying PyC across large spatial scales remains a significant challenge in constraining the global carbon cycle. We measured PyC in topsoils across Europe using molecular marker (benzene polycarboxylic acids, BPCA) and spectroscopic techniques (Diffuse Reflectance Infrared Fourier Transform Spectroscopy, DRIFTS). We developed a calibration between BPCA and DRIFTS, but the calibration was less reliable (Y-variance explained=0.62) than previous reports due to low soil PyC content and heterogeneity of soil matrices. Thus, we performed multiple regressions to identify drivers of PyC distribution using only the measured BPCA data. PyC content varied widely among soils, contributing 0–24% of SOC. Organic carbon was the strongest predictor of soil PyC content, but mean annual temperature, clay, and cation exchange capacity also emerged as predictors. PyC contributes a smaller proportion of SOC in European soils compared to other geographic regions. Comparing soil PyC measurements to PyC production rates in high latitude and Mediterranean regions suggests that transport, degradation, and recombustion are important mechanisms regulating soil PyC accumulation.


Auteurs, date et publication :

Auteurs Yamina Pressler , Claudia M. Boot , Samuel Abiven , Emanuele Lugato , M. Francesca Cotrufo , Mark Farrell , Yamina Pressler , Claudia M. Boot , Samuel Abiven , Emanuele Lugato , M. Francesca Cotrufo , Mark Farrell

Publication : Soil Research

Date : 2022


Catégorie(s)

#CNRS #Ecotron IleDeFrance #ENS

Auteurs, date et publication :

Auteurs Bruno Verdier , Isabelle Jouanneau , Benoit Simonnet , Christian Rabin , Tom J. M. Van Dooren , Nicolas Delpierre , Jean Clobert , Luc Abbadie , Régis Ferrière , Jean-François Le Galliard

Publication : Environmental Science & Technology

Date : 2014

Volume : 48

Issue : 15

Pages : 8744-8753


Catégorie(s)

#ANR-Citation #CNRS #Ecotron IleDeFrance #ENS

Résumé

The influence of climate change on the ecological impacts of invasive alien species (IAS) remains understudied, with deoxygenation of aquatic environments often-overlooked as a consequence of climate change. Here, we therefore assessed how oxygen saturation affects the ecological impact of a predatory invasive fish, the Ponto-Caspian round goby (Neogobius melanostomus), relative to a co-occurring endangered European native analogue, the bullhead (Cottus gobio) experiencing decline in the presence of the IAS. In individual trials and mesocosms, we assessed the effect of high, medium and low (90%, 60% and 30%) oxygen saturation on: (1) functional responses (FRs) of the IAS and native, i.e. per capita feeding rates; (2) the impact on prey populations exerted; and (3) how combined impacts of both fishes change over invasion stages (Pre-invasion, Arrival, Replacement, Proliferation). Both species showed Type II potentially destabilising FRs, but at low oxygen saturation, the invader had a significantly higher feeding rate than the native. Relative Impact Potential, combining fish per capita effects and population abundances, revealed that low oxygen saturation exacerbates the high relative impact of the invader. The Relative Total Impact Potential (RTIP), modelling both consumer species’ impacts on prey populations in a system, was consistently higher at low oxygen saturation and especially high during invader Proliferation. In the mesocosm experiment, low oxygen lowered RTIP where both species were present, but again the IAS retained high relative impact during Replacement and Proliferation stages at low oxygen. We also found evidence of multiple predator effects, principally antagonism. We highlight the threat posed to native communities by IAS alongside climate-related stressors, but note that solutions may be available to remedy hypoxia and potentially mitigate impacts across invasion stages.


Auteurs, date et publication :

Auteurs James W. E. Dickey , Neil E. Coughlan , Jaimie T. A. Dick , Vincent Médoc , Monica McCard , Peter R. Leavitt , Gérard Lacroix , Sarah Fiorini , Alexis Millot , Ross N. Cuthbert

Publication : Biological Invasions

Date : 2021


Catégorie(s)

#ANR-Citation #CNRS #Ecotron IleDeFrance #ENS

Auteurs, date et publication :

Auteurs Yann Dusza , Enrique P. Sanchez-Cañete , Jean-François Le Galliard , Régis Ferrière , Simon Chollet , Florent Massol , Amandine Hansart , Sabrina Juarez , Katerina Dontsova , Joost van Haren , Peter Troch , Mitchell A. Pavao-Zuckerman , Erik Hamerlynck , Greg A. Barron-Gafford

Publication : Scientific Reports

Date : 2025

Volume : 10

Issue : 1

Pages : 905


Catégorie(s)

#ANR-Citation #CNRS #Ecotron IleDeFrance #ENS
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