Résumé
Species dispersal and resource spatial flows greatly affect the dynamics of connected ecosystems. So far, research on meta-ecosystems has mainly focused on the quantitative effect of subsidy flows. Yet, resource exchanges at heterotrophic-autotrophic (e.g., aquatic-terrestrial) ecotones display a stoichiometric asymmetry that likely matters for functioning. Here, we joined ecological stoichiometry and the meta-ecosystem framework to understand how subsidy stoichiometry mediates the response of the meta-ecosystem to subsidy flows. Our model results demonstrate that resource flows between ecosystems can induce a positive spatial feedback loop, leading to higher production at the meta-ecosystem scale by relaxing local ecosystem limitations (“spatial complementarity”). Furthermore, we show that spatial flows can also have an unexpected negative impact on production when accentuating the stoichiometric mismatch between local resources and basal species needs. This study paves the way for studies on the interdependancy of ecosystems at the landscape extent.
Data: The code and the data, as well as a small tutorial to run the model are available on Github via Zenodo: https://doi.org/10.5281/zenodo.7733880
Auteurs, date et publication :
Auteurs Benôıt Pichon , Elisa Thébault , Gérard Lacroix , Isabelle Gounand
Date : 2023
Catégorie(s)
#CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs V. Médoc , T. Spataro , R. Arditi
Publication : Freshwater Biology
Date : 2025
Volume : 58
Issue : 5
Pages : 858-865
Catégorie(s)
#CNRS #ENS #PLANAQUARésumé
Comparing the relationship between resource use and resource availability (i.e. the functional response, FR) between two predators can provide useful insights on their relative predatory impacts. For instance in invasion ecology, an increase in the predation pressure on local prey populations can be predicted from a significant difference in FR revealing a higher FR for the invasive predator compared to the native trophic analogue it may replace. In traditional FR experiments, the focal prey species is the only source of food. This may lead to misinterpretations with opportunistic omnivores that are able to cope with different resource availabilities in their natural environment, and whose predation rate may therefore be modulated by the presence of alternative resources. To address this question, we compared the FR of two freshwater gammarid species known to behave as opportunistic omnivores: the invasive “killer shrimp” Dikerogammarus villosus and the native Gammarus pulex, in a treatment with a focal prey species as the only food source (the water flea Daphnia magna) and in a treatment with the focal prey and an alternative food source (Carpinus betulus leaves). D. villosus showed a significantly higher FR than G. pulex with water fleas only and providing leaf litter suppressed this difference. The predatory impact of D. villosus might therefore be modulated by the relative availability of live prey compared to the alternative food sources. Increasing the realism of FR experiments through the inclusion of abundant and easily accessible alternative resources, like leaf litter for benthic invertebrates, should refine the predictions made from FR comparisons.
Auteurs, date et publication :
Auteurs Vincent Médoc , Laura Thuillier , Thierry Spataro
Publication : Biological Invasions
Date : 2018
Volume : 20
Issue : 5
Pages : 1307-1319
Catégorie(s)
#CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs Lisa Jacquin , Quentin Mori , Mickaël Pause , Mélanie Steffen , Vincent Medoc , Carlos Garcia de Leaniz
Publication : Plos One
Date : 2014
Volume : 9
Issue : 7
Pages : e101684
Catégorie(s)
#CNRS #ENS #PLANAQUARésumé
The ecosystem services (EcoS) concept is being used increasingly to attach values to natural systems and the multiple benefits they provide to human societies. Ecosystem processes or functions only become EcoS if they are shown to have social and/or economic value. This should assure an explicit connection between the natural and social sciences, but EcoS approaches have been criticized for retaining little natural science. Preserving the natural, ecological science context within EcoS research is challenging because the multiple disciplines involved have very different traditions and vocabularies (common-language challenge) and span many organizational levels and temporal and spatial scales (scale challenge) that define the relevant interacting entities (interaction challenge). We propose a network-based approach to transcend these discipline challenges and place the natural science context at the heart of EcoS research.
Auteurs, date et publication :
Auteurs The QUINTESSENCE Consortium
Publication : Trends in Ecology & Evolution
Date : 2016
Volume : 31
Issue : 2
Pages : 105-115
Catégorie(s)
#CNRS #Ecotron IleDeFrance #ENS #PLANAQUAAuteurs, date et publication :
Auteurs Adélaïde Roguet , Grégory S. Laigle , Claire Therial , Adèle Bressy , Frédéric Soulignac , Arnaud Catherine , Gérard Lacroix , Ludwig Jardillier , Céline Bonhomme , Thomas Z. Lerch , Françoise S. Lucas , Tillmann Lueders
Publication : FEMS Microbiology Ecology
Date : 2025
Volume : 91
Issue : 11
Pages : fiv125
Catégorie(s)
#CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs Clémentine Renneville , Arnaud Le Rouzic , Michel Baylac , Alexis Millot , Stéphane Loisel , Eric Edeline
Publication : Oikos
Date : 2025
Volume : 125
Issue : 8
Pages : 1193-1202
Catégorie(s)
#CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs Benoît Sotton , Alain Paris , Séverine Le Manach , Alain Blond , Gérard Lacroix , Alexis Millot , Charlotte Duval , Hélène Huet , Qin Qiao , Sophie Labrut , Giovanni Chiapetta , Joelle Vinh , Arnaud Catherine , Benjamin Marie
Publication : Scientific Reports
Date : 2025
Volume : 7
Issue : 1
Catégorie(s)
#ANR-Citation #CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs Florence D. Hulot , Maurice Rossi , Bruno Verdier , Jean-Pascal Urban , Lydie Blottière , Fantina Madricardo , Beatriz Decencière
Publication : Limnology and Oceanography: Methods
Date : 2025
Volume : 15
Issue : 2
Pages : 154-165
Catégorie(s)
#ANR-Citation #CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs S. Barot , J.-C. Lata , G. Lacroix
Publication : Ecological Engineering
Date : 2025
Volume : 45
Pages : 13-23