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The organisation of ecological networks in time and space

Titel Englisch The organisation of ecological networks in time and space
Gesuchsteller/in Bersier Louis-Félix
Nummer 138489
Förderungsinstrument Projektförderung (Abt. I-III)
Forschungseinrichtung Unité d'Ecologie et Evolution Département de Biologie Université de Fribourg
Hochschule Universität Freiburg - FR
Hauptdisziplin Oekologie
Beginn/Ende 01.01.2012 - 30.04.2015
Bewilligter Betrag 438'000.00
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Keywords (9)

Community ecology; Biodiversity; Assembly rules; Food-web ecology; Ecological networks; Reciprocal transplant experiments; Pitcher plants; Sown wildflower strips; Community stability

Lay Summary (Englisch)

Lead
Lay summary

Current global changes put pressure on natural communities. Understanding how these communities are organized in time and space is crucial to predict how they will react to more variable meteorological conditions, increased temperature, or fragmentation of habitats. We will tackle the question of the organization, functioning, and evolution of communities by considering the trophic (who eats whom) and non-trophic (e.g., pollination, nest provisioning...) relations between species, thus considering communities as interaction networks. A "large-scale" and a "small-scale" system will be studied. The former consists of sown wildflower strips in agroecosystems, the latter of urn-like leaves (pitchers) of Sarracenia purpurea, a North American plant species introduced in Europe and inhabiting bogs. The ecological networks in the wildflower strips will be used to test several models of community organization and notably how the spatial arrangement of communities influences their composition and structure (metacommunity models). The small size of pitchers allows recording the evolution of the abundances of the species inhabiting the leaves, notably with molecular techniques for bacteria. The network in pitchers will be used in two lines of research: firstly, we will manipulate the presence/absence of key species (e.g., top predators) and of environmental conditions (e.g., temperature) and follow the dynamical response of the communities. Secondly, we will perform reciprocal transplant experiments to explore the question of "local adaptation" at a network level.

Direktlink auf Lay Summary Letzte Aktualisierung: 21.02.2013

Verantw. Gesuchsteller/in und weitere Gesuchstellende

Mitarbeitende

Publikationen

Publikation
Effects of temperature variability on community structure in a natural microbial food web
Zander Axel, Bersier Louis-Felix, Gray Sarah M. (2017), Effects of temperature variability on community structure in a natural microbial food web, in GLOBAL CHANGE BIOLOGY, 23(1), 56-67.
Matching-centrality decomposition and the forecasting of new links in networks.
Rohr Rudolf P, Naisbit Russell E, Mazza Christian, Bersier Louis-Félix (2016), Matching-centrality decomposition and the forecasting of new links in networks., in Proceedings. Biological sciences, 283(1824), 20152702.
Mismatch in microbial food webs: predators but not prey perform better in their local biotic and abiotic conditions.
Parain Elodie C, Gravel Dominique, Rohr Rudolf P, Bersier Louis-Félix, Gray Sarah M (2016), Mismatch in microbial food webs: predators but not prey perform better in their local biotic and abiotic conditions., in Ecology and evolution, 6(14), 4885-97.
Persist or Produce: A Community Trade-Off Tuned by Species Evenness
Rohr Rudolf P., Saavedra Serguei, Peralta Guadalupe, Frost Carol M., Bersier Louis-Felix, Bascompte Jordi, Tylianakis Jason M. (2016), Persist or Produce: A Community Trade-Off Tuned by Species Evenness, in AMERICAN NATURALIST, 188(4), 411-422.
The feasibility of equilibria in large ecosystems: a primary but neglected concept in the complexity-stability debate
Dougoud Michael, Vinckenbosch Laura, Rohr Rudolf P., Bersier Louis-Félix, Mazza Christian (2016), The feasibility of equilibria in large ecosystems: a primary but neglected concept in the complexity-stability debate, Cornell University Library, Ithaca, NY.
The perfect mixing paradox and the logistic equation: Verhulst vs. Lotka
Arditi Roger, Bersier Louis-Felix, Rohr Rudolf P. (2016), The perfect mixing paradox and the logistic equation: Verhulst vs. Lotka, in ECOSPHERE, 7(11), e01599.
Top predators affect the composition of naive protist communities, but only in their early-successional stage
Zander Axel, Gravel Dominique, Bersier Louis-Felix, Gray Sarah M. (2016), Top predators affect the composition of naive protist communities, but only in their early-successional stage, in OECOLOGIA, 180(2), 519-528.
Do spiders respond to global change? A study on the phenology of ballooning spiders in Switzerland
Blandenier Gilles, Bruggisser Odile T., Bersier Louis-Felix (2014), Do spiders respond to global change? A study on the phenology of ballooning spiders in Switzerland, in ECOSCIENCE, 21(1), 79-95.
Including community composition in biodiversity-productivity models
Sandau Nadine, Rohr Rudolf P., Naisbit Russell E., Fabian Yvonne, Bruggisser Odile T., Kehrli Patrik, Aebi Alexandre, Bersier Louis-Felix (2014), Including community composition in biodiversity-productivity models, in METHODS IN ECOLOGY AND EVOLUTION, 5(8), 815-823.
Plant diversity in a nutshell: testing for small-scale effects on trap nesting wild bees and wasps
Fabian Yvonne, Sandau Nadine, Bruggisser Odile T., Aebi Alexandre, Kehrli Patrik, Rohr Rudolf P., Naisbit Russell E., Bersier Louis-Felix (2014), Plant diversity in a nutshell: testing for small-scale effects on trap nesting wild bees and wasps, in ECOSPHERE, 5(2), article 18.
Structure Comparison of Binary and Weighted Niche-Overlap Graphs
Sokhn Nayla, Baltensperger Richard, Bersier Louis-Félix, Ultes-Nitsche Ulrich, Hennebert Jean (2014), Structure Comparison of Binary and Weighted Niche-Overlap Graphs, in Contucci Pierluigi (ed.), Springer, Berlin, 119-127.
Identification of chordless cycles in ecological networks
Sokhn Nayla, Baltensperger Richard, Bersier Louis-Félix, Hennebert Jean, Ultes-Nitsche Ulrich (2013), Identification of chordless cycles in ecological networks, in Glass Kristin (ed.), Springer, Cham, 316-324.
Structural Network Properties of Niche-Overlap Graphs
Sokhn Nayla, Baltensperger Richard, Bersier Louis-Félix, Ultes-Nitsche Ulrich, Hennebert Jean (2013), Structural Network Properties of Niche-Overlap Graphs, in Chbeir Richard (ed.), IEEE Computer Society, New York, NY, 478-482.
The importance of landscape and spatial structure for hymenopteran-based food webs in an agro-ecosystem.
Fabian Yvonne, Sandau Nadine, Bruggisser Odile T, Aebi Alex, Kehrli Patrik, Rohr Rudolf P, Naisbit Russell E, Bersier Louis-Félix (2013), The importance of landscape and spatial structure for hymenopteran-based food webs in an agro-ecosystem., in The Journal of animal ecology, 82(6), 1203-14.
Diversity protects plant communities against generalist molluscan herbivores.
Fabian Yvonne, Sandau Nadine, Bruggisser Odile T, Kehrli Patrik, Aebi Alexandre, Rohr Rudolf P, Naisbit Russell E, Bersier Louis-Félix (2012), Diversity protects plant communities against generalist molluscan herbivores., in Ecology and evolution, 2(10), 2460-73.
Ecophylogenetics: advances and perspectives.
Mouquet Nicolas, Devictor Vincent, Meynard Christine N, Munoz Francois, Bersier Louis-Félix, Chave Jérôme, Couteron Pierre, Dalecky Ambroise, Fontaine Colin, Gravel Dominique, Hardy Olivier J, Jabot Franck, Lavergne Sébastien, Leibold Mathew, Mouillot David, Münkemüller Tamara, Pavoine Sandrine, Prinzing Andreas, Rodrigues Ana S L, Rohr Rudolf P, Thébault Elisa, Thuiller Wilfried (2012), Ecophylogenetics: advances and perspectives., in Biological reviews of the Cambridge Philosophical Society, 87(4), 769-85.
Statistical approaches for inferring and predicting food-web architecture
Rohr Rudolf P., Naisbit Russell E., Mazza Christian, Bersier Louis-Félix, Statistical approaches for inferring and predicting food-web architecture, in Moore John C. (ed.), Cambridge University Press, Cambridge, UK.
Structural instability of food webs and food-web models and its implications for management
Rossberg Axel G., Caskenette Amanda L., Bersier Louis-Félix, Structural instability of food webs and food-web models and its implications for management, in Moore John C. (ed.), Cambridge University Press, Cambridge, UK.
The relative contributions of species richness and species composition to ecosystem functioning
Sandau Nadine, Fabian Yvonne, Bruggisser Odile T., Rohr Rudolf P., Naisbit Russell E., Kehrli Patrik, Aebi Alexandre, Bersier Louis-Félix, The relative contributions of species richness and species composition to ecosystem functioning, in Oikos.

Zusammenarbeit

Gruppe / Person Land
Formen der Zusammenarbeit
Prof Edward Mitchell, Univ. Neuchâtel Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
Prof George Sugihara, Scripps Institution of Oceanography, UCSD Vereinigte Staaten von Amerika (Nordamerika)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
Dr Christian Mazza, Institut de mathématiques, Univ. Fribourg Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Dr Alexandre Aebi, Université de Neuchâtel Schweiz (Europa)
- Publikation
Dr Sven Bacher, University of Fribourg Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Forschungsinfrastrukturen
Prof Heinz Müller-Schärer, University of Fribourg Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Forschungsinfrastrukturen
Dr Owen Petchey, University Zurich Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
Dr. Patrik Kehrli, Agroscope Changin Schweiz (Europa)
- Publikation
Prof Jean-Pierre Gabriel, Institut de mathématiques, Univ. Fribourg Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Prof Christian Lexer, Univ. Fribourg Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Forschungsinfrastrukturen

Wissenschaftliche Veranstaltungen

Aktiver Beitrag

Titel Art des Beitrags Titel des Artikels oder Beitrages Datum Ort Beteiligte Personen
Biology2016, University of Lausanne Poster The effects of temperature and dispersal on species richness in microbial metacommunities 11.12.2016 Lausanne, Schweiz Gray Sarah Marie; Bersier Louis-Félix;
Séminaire, WSL Birmensdorf Einzelvortrag Negative Biodiversity-Ecosystem Functioning relationships: myth or reality? 23.03.2016 Birmensdorf, Schweiz Bersier Louis-Félix;
Biology2016, University of Lausanne Vortrag im Rahmen einer Tagung Global warming disrupts biodiversity-ecosystem functioning relationships 11.02.2016 Lausanne, Schweiz Bersier Louis-Félix; Gray Sarah Marie;
Séminaire, University of Muenster Einzelvortrag Exploring food-web structure: from stochastic to statistical models 11.03.2015 Muenster, Deutschland Bersier Louis-Félix;
Biology2015, EAWAG Dübendorf Vortrag im Rahmen einer Tagung Increase in temperature variability affects community dynamics differently depending on trophic level 12.02.2015 Dübendorf, Schweiz Bersier Louis-Félix; Gray Sarah Marie; Zander Axel Gregor;
Biology2015, EAWAG Dübendorf Poster Community complexity buffers the impact of increased temperature average and variation 12.02.2015 Dübendorf, Schweiz Bersier Louis-Félix; Gray Sarah Marie;
Biology2015, EAWAG Dübendorf Poster How to include community composition in biodiversity-productivity models 12.02.2015 Dübendorf, Schweiz Bersier Louis-Félix;
Joint Annual Meeting of the British Ecological Society and of the Société Française d'Ecologie Vortrag im Rahmen einer Tagung Reconciling results of biodiversity-productivity analyses in natural and experimental systems 09.12.2014 Lille, Frankreich Bersier Louis-Félix;
Joint Annual Meeting of the British Ecological Society and of the Société Française d'Ecologie Poster Including community composition in biodiversity-productivity models 09.12.2014 Lille, Frankreich Bersier Louis-Félix;
Joint Annual Meeting of the British Ecological Society and of the Société Française d'Ecologie Vortrag im Rahmen einer Tagung Does community complexity buffer the effect of increased temperature average and variance in simple protist systems 09.12.2014 Lille, Frankreich Bersier Louis-Félix; Gray Sarah Marie;
Joint Annual Meeting of the British Ecological Society and of the Société Française d'Ecologie Vortrag im Rahmen einer Tagung Experimental test of food-chain length in protist communities: ecosystem size matters, but not the way you may think 09.12.2014 Lille, Frankreich Gray Sarah Marie; Bersier Louis-Félix;
99th Annual meeting of the Ecological Society of America Vortrag im Rahmen einer Tagung The effect of increased temperature variability on community dynamics depends on trophic level position 10.08.2014 Sacramento, Vereinigte Staaten von Amerika Zander Axel Gregor; Bersier Louis-Félix; Gray Sarah Marie;
99th Annual meeting of the Ecological Society of America Vortrag im Rahmen einer Tagung A common garden food web experiment reveals local adaptation of consumers but not of prey 10.08.2014 Sacramento, Vereinigte Staaten von Amerika Gray Sarah Marie; Bersier Louis-Félix;
99th Annual meeting of the Ecological Society of America Vortrag im Rahmen einer Tagung A top predator affects community dynamics of predator-naive Sarracenia pitcher plant communities 10.08.2014 Sacramento, Vereinigte Staaten von Amerika Bersier Louis-Félix; Gray Sarah Marie; Zander Axel Gregor;
99th Annual meeting of the Ecological Society of America Vortrag im Rahmen einer Tagung Exploring food-web structure with latent traits models 10.08.2014 Sacramento, Vereinigte Staaten von Amerika Bersier Louis-Félix;
99th Annual meeting of the Ecological Society of America Poster Reconciling results of biodiversity-productivity analyses in natural and experimental systems 10.08.2014 Sacramento, Vereinigte Staaten von Amerika Bersier Louis-Félix;
Worshop: Non-adaptive selection: explaining macroscopic laws in ecology Vortrag im Rahmen einer Tagung Phylogeny and food-web structure 07.07.2014 EPFL, Schweiz Bersier Louis-Félix;
Séminaire, Université de Neuchâtel Einzelvortrag A common garden experiment reveals that consumers are more affected than their prey to changing local conditions 15.04.2014 Nauchâtel, Schweiz Gray Sarah Marie;
Biology2014, University of Geneva Vortrag im Rahmen einer Tagung A common garden experiment with pitcher plant food webs reveals adaptation of consumers but not of prey 13.02.2014 Geneva, Schweiz Gray Sarah Marie; Bersier Louis-Félix;
Biology2014, University of Geneva Poster Do spiders respond to global change? A study on the phenology of ballooning spiders in Switzerland 13.02.2014 Geneva, Schweiz Bersier Louis-Félix;
Biology2014, University of Geneva Poster Body-size, phylogeny, and food-web architecture 13.02.2014 Geneva, Schweiz Bersier Louis-Félix;
Biology2014, University of Geneva Poster A Top Predator affects Community Composition of Naive Sarracenia purpurea Pitcher Plant Communities 13.02.2014 Geneva, Schweiz Bersier Louis-Félix; Zander Axel Gregor; Gray Sarah Marie;
Biology2014, University of Geneva Poster The diet of micromammals in sown wildflower strips: do they feed in surrounding agricultural fields? 13.02.2014 Geneva, Schweiz Bersier Louis-Félix;
Symposium "Food Webs: Science for Impact" Vortrag im Rahmen einer Tagung Exploring food-web structure with latent traits models 13.11.2013 Justus Liebig University - Schloss Rauischholzhausen, Deutschland Bersier Louis-Félix;
Symposium "Food Webs: Science for Impact" Poster Body-size, phylogeny, and food-web architecture 13.11.2013 Justus Liebig University - Schloss Rauischholzhausen, Deutschland Bersier Louis-Félix;
Séminaire, University of Bern Einzelvortrag Response of trophic levels on vegetation manipulation in a metacommunity context 29.10.2013 Berne, Schweiz Bersier Louis-Félix;
Journées de modélisation biomathématique de Besançon Vortrag im Rahmen einer Tagung L'exploration de la structure des réseaux écologiques par des modèles à traits latents 11.06.2013 Besançon, Frankreich Bersier Louis-Félix;
Séminaire, University of Zurich Einzelvortrag Response of higher trophic levels on vegetation manipulation in a metacommunity context 23.04.2013 Zurich, Schweiz Bersier Louis-Félix;
Biology2013 Vortrag im Rahmen einer Tagung Including plant species composition in biodiversity-productivity models 06.02.2013 Basel, Schweiz Bersier Louis-Félix;
Networks and interactions in agriculture Vortrag im Rahmen einer Tagung Exploring the structure of networks with latent trait models 27.09.2012 Dijon, Frankreich Bersier Louis-Félix;
Seminaire, University of Bern Einzelvortrag Latent traits models for networks: from the structure of food-webs to the forecasting of the role of invasive species 01.05.2012 Berne, Schweiz Bersier Louis-Félix;
Séminaire, Université Pierre et Marie Curie Einzelvortrag Exploring the structure of networks with latent traits models 14.04.2012 Paris, Frankreich Bersier Louis-Félix;
2nd Protist workshop at Eawag Vortrag im Rahmen einer Tagung The successional pattern of protists in the aquatic community inhabiting the leaves of Sarracenia purpurea 15.03.2012 EAWAG, Dübendorf, Schweiz Gray Sarah Marie;
Biology2012, University of Fribourg Poster Phylogeny and body size as architects of food‐web structure 08.02.2012 Fribourg, Schweiz Bersier Louis-Félix;
Biology2012, University of Fribourg Vortrag im Rahmen einer Tagung The importance of plant diversity, land-use and wildflower strip spatial distribution on a bee and wasp metacommunity 08.02.2012 Fribourg, Schweiz Bersier Louis-Félix;


Selber organisiert

Titel Datum Ort
Biodiversity and ecosystem functioning under global change: theory and experiment 15.09.2016 Fribourg, Schweiz
Ecological networks in a spatial context: beyond local analyses of species interactions 10.09.2015 Fribourg, Schweiz
Biology2012, University of Fribourg 08.02.2012 Fribourg, Schweiz

Kommunikation mit der Öffentlichkeit

Kommunikation Titel Medien Ort Jahr
Medienarbeit: Printmedien, Online-Medien Le permafrost se réchauffe La Gruyère Westschweiz 2016
Medienarbeit: Radio, Fernsehen Les Experts Radio Fribourg Westschweiz 2016
Medienarbeit: Printmedien, Online-Medien Question d'enfant: Pourquoi la coccinelle a-t-elle des points? Universitas Friburgensis Westschweiz 2016
Medienarbeit: Printmedien, Online-Medien Squatters dans le jus La Salamandre Westschweiz International 2015
Medienarbeit: Printmedien, Online-Medien Les nouveaux défis de l'écologie Science&Vie International 2014
Medienarbeit: Printmedien, Online-Medien Das Geheimnis der roten Schlauchpflanze Tierwelt Deutschschweiz 2013
Medienarbeit: Printmedien, Online-Medien Des règles mathématiques derrière la diversité des tailles Le Temps Westschweiz 2013

Verbundene Projekte

Nummer Titel Start Förderungsinstrument
165800 Niche structure, dynamics, and coexistence in natural microcosms 01.12.2016 Projektförderung (Abt. I-III)
113843 Biodiversity in agroecosystems: a multi-trophic approach to metacommunities 01.01.2007 Projektförderung (Abt. I-III)
113843 Biodiversity in agroecosystems: a multi-trophic approach to metacommunities 01.01.2007 Projektförderung (Abt. I-III)
150861 The Interplay between Community and Ecosystem Processes: Response to Global Changes and the Importance of Local Adaptation 01.08.2013 Internationale Kurzaufenthalte

Abstract

Understanding how communities are organized in time and in space is a crucial need for science and society given the current biodiversity crisis and global changes. The study of the dynamics of ecological networks has been investigated for many years by ecologists; incorporation of the spatial aspect for communities - the metacommunity approach - is much more recent. Importantly, theoretical research on both themes abounds, while empirical and experimental studies are much scarcer, especially concerning the dynamics of ecological networks. The present project is aimed at testing current theories on metacommunities and dynamical stability of communities in two systems. The first is a large-scale metacommunity of 12 experimental wildflower strips in agroecosystems; the second consists of small-scale food-webs found in the pitcher plant Sarracenia purpurea. Notably, the latter system allows exploration of question of “local adaptation” at the food-web level, a key aspect to understand the evolution of communities subjected to anthropogenic changes.In an earlier project, we installed 12 experimental wildflower strips in an agricultural landscape where plant species richness was manipulated. We have applied an extensive sampling protocol from automn 2007 to 2009, involving plants, arthropods and vertebrates, and several studies on specific systems are close to completion (e.g., on host-parasitoid or plant-pollinator webs). The first part of the present proposal will build on this data. The 12 local food-webs will be assembled and they will be analysed with respect to the local environment, the neighbouring landscape and their spatial dependence. We will test different hypotheses about food-webs organized at the local and at the landscape level. The second part of the project involves the study of food-webs in the water-filled leaves of S. purpurea, which was introduced in Switzerland about 100 y ago. This system allows replicated experiments to be performed on whole communities. We will tackle two main themes. The first concerns reciprocal transplant experiments to study local adaptation at the food-web level. The second will explore the dynamics of these systems under natural and experimental conditions. The experiment will consist of manipulating the presence of different functional groups, notably the so-called fast (bacterial) and slow (algal) channels, which have been hypothesized to account for much of the stability property of food-webs.The present project is interdisciplinary, as the skills of ecologists, taxonomists, molecular biologists and mathematicians are needed. It should yield results of great scientific value, but it will also be important for applied conservation. The project on wildflower strips has already provided published accounts of the ecological value of wildflower strips. The results of the “meta food-web” research will give further insights for better practices to improve the global functioning of ecological compensation areas. The Sarracenia part of the project should provide cutting-edge results for community dynamics and metacommunity theory, with the local adaptation experiment being of great interest for our understanding of potential effects of climate change on natural systems.
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