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An individual-level approach to disentangle niches, drift and dispersal in phytoplankton metacommunity dynamics

Titel Englisch An individual-level approach to disentangle niches, drift and dispersal in phytoplankton metacommunity dynamics
Gesuchsteller/in Pomati Francesco
Nummer 144053
Förderungsinstrument Projektförderung (Abt. I-III)
Forschungseinrichtung Eawag
Hochschule Eidg. Anstalt für Wasserversorgung, Abwasserreinigung und Gewässerschutz - EAWAG
Hauptdisziplin Oekologie
Beginn/Ende 01.05.2013 - 31.12.2016
Bewilligter Betrag 243'136.00
Alle Daten anzeigen

Alle Disziplinen (4)

Disziplin
Oekologie
Umweltforschung
Experimentelle Mikrobiologie
Hydrologie, Limnologie, Glaziologie

Keywords (8)

metacommunity; biodiversity; phytoplankton; niches; individual-level model; trait-based approach; neutral theory; field mesocoms

Lay Summary (Italienisch)

Lead
Lo scopo di questo progetto è di testare l’importanza relativa della selezione naturale, delle dinamiche stocastiche che caratterizzano le popolazioni naturali, e del movimento degli individui attraverso differenti profondità di un lago (che rappresentano ambienti differenti), sulla composizione e diversità delle comunità di fitoplancton. In questo progetto approcceremo lo studio della biodiversità partendo dalle caratteristiche dei singoli individui, della loro morfologia e fisiologia.
Lay summary

Soggetto e obiettivo

La variabilità a livello individuale e le sue dinamiche spaziali e temporali su piccola scala sono una caratteristica comune di tutti gli ambienti eterogenei, ma rappresentano uno degli aspetti meno studiati fra quelli che influenzano le dinamiche della biodiversità in ambienti naturali. La teoria neutrale della biodiversità è un buon inizio per modellare come il movimento di organismi fra comunità possa influenzare la diversità in biocenosi isolate, e quanto la variabilità individuale in caratteristiche morfologiche e fisiologiche risponda a cambiamenti ambientali ed influenzi funzioni ecologiche come la produttività. I nostri obiettivi sono di (1) sviluppare una nuova teoria che leghi la variazione a livello individuale in tratti fisio-morfologici alle dinamiche della biodiversità e alle funzioni degli ecosistemi, testare le previsione teoriche usando dati di monitoraggio ad alta frequenza e esperimenti in situ. Useremo i dati per studiare l’interazione fra variabilità nelle caratteristiche degli individui, l’eterogeneità degli ambienti naturali, la deriva ecologica e la mobilità degli organismi fra comunità sulla biodiversità totale e le funzioni di un ecosistema.

Contesto socio-scientifico

Il nostro approccio che combina teoria, monitoraggio e esperimenti aiuterà a comprendere meglio come i processi deterministici (prevedibili) e stocastici (imprevedibili) interagiscono nello strutturare la biodiversità all’interno e fra le specie. Proteggere gli ambienti naturali dall’impatto umano non richiede solo la conservazione della biodiversità, ma anche l’identificazione e conservazione dei processi ecologici e evoluzionistici che generano e mantengono la biodiversità.

Direktlink auf Lay Summary Letzte Aktualisierung: 04.06.2013

Lay Summary (Englisch)

Lead
The purpose of this research is to test the relative importance of natural selection, stochastic population dynamics and dispersal across depths of a lake on the composition and diversity of natural phytoplankton communities. Depths in lakes represent different environments and may be important hotspots of ecological and evolutionary dynamics. We will study biodiversity dynamics starting from the characteristics of the individuals in terms of their morphology and physiology.
Lay summary

Summary of objectives

Individual level variability in traits and small-scale spatial and temporal dynamics are a common feature of all heterogeneous environments, but they are among the least-understood aspects that influence biodiversity of natural communities. Neutral theory is a good starting point for modelling how dispersal affects diversity in multiple patches, and for how individual variability responds to environmental heterogeneity and influence ecological functions like productivity. Our goals are to (1) develop new theory relating individual-based variation in traits to biodiversity dynamics and ecosystem functioning (2) test theoretical predictions using high-frequency monitoring of phytoplankton communities and in-situ experiments. We will use data to test the interaction between individual variability in traits, environmental heterogeneity, ecological drift and dispersal between phytoplankton patches in the overall biodiversity and ecosystem functioning.

Socio-cultural context

Our combined approach will advance the basic and applied knowledge on how deterministic (predictable) and stochastic (unpredictable) processes interact to structure intra and inter-species biodiversity and ecosystem functioning. Buffering against human impacts requires not only the conservation of biodiversity, but also the identification and conservation of the ecological and evolutionary processes that generate and maintain biodiversity.

Direktlink auf Lay Summary Letzte Aktualisierung: 04.06.2013

Verantw. Gesuchsteller/in und weitere Gesuchstellende

Mitarbeitende

Publikationen

Publikation
Individual-level trait diversity concepts and indices to comprehensively describe community change in multidimensional trait space
Fontana Simone, Petchey Owen L., Pomati Francesco (2016), Individual-level trait diversity concepts and indices to comprehensively describe community change in multidimensional trait space, in Functional Ecology, 30, 808-818.
Opportunities and challenges in deriving phytoplankton diversity measures from individual trait-based data obtained by scanning flow-cytometry
Fontana Simone, Jokela Jukka, Pomati Francesco (2014), Opportunities and challenges in deriving phytoplankton diversity measures from individual trait-based data obtained by scanning flow-cytometry, in Frontiers in Microbiology, 5, 324-324.

Zusammenarbeit

Gruppe / Person Land
Formen der Zusammenarbeit
Owen Petchey, University Zurich Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Piet Spaak, Eawag Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
- Forschungsinfrastrukturen
- Austausch von Mitarbeitern
Frederik De Laender, University of Namur Belgien (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
Anita Narwani, Eawag-ETH Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
- Forschungsinfrastrukturen
- Austausch von Mitarbeitern
Luca Nizzetto, NIVA Norwegen (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Forschungsinfrastrukturen
- Austausch von Mitarbeitern
Carlo Albert, Eawag Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
- Forschungsinfrastrukturen
- Austausch von Mitarbeitern
Alfred Johny Wüest, EPFL-Eawag Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Jukka Jokela, ETH-Eawag Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
- Forschungsinfrastrukturen
Mirela Moldoveanu, Institute of Biology, Bucharest Rumänien (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Bas Ibelings, University of Geneva Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Forschungsinfrastrukturen
- Austausch von Mitarbeitern

Wissenschaftliche Veranstaltungen

Aktiver Beitrag

Titel Art des Beitrags Titel des Artikels oder Beitrages Datum Ort Beteiligte Personen
invited seminar Einzelvortrag Linking phytoplankton responses to environmental change across scales 18.10.2016 Center for oceanography, Marseilles, Frankreich Pomati Francesco;
invited seminar Einzelvortrag Regularity in the traits of individuals outcompetes other biodiversity metrics in explaining ecosystem properties 23.06.2016 University, Sevilla, Spanien Fontana Simone;
invited seminar Einzelvortrag Linking individual-level traits to phytoplankton community dynamics using in situ automated monitoring 11.05.2016 University, Basel, Schweiz Pomati Francesco;
invited seminar Einzelvortrag Linking individual-level traits to phytoplankton community dynamics 21.12.2015 Anton Dohrn Zoological station, Naples, Italien Pomati Francesco;
invited seminar Einzelvortrag Do traits of single individuals matter for ecosystem processes? 16.12.2015 WSL Birmensdorf, Schweiz Pomati Francesco; Fontana Simone;
invited seminar Einzelvortrag Phytoplankton traits across space and time: linking environmental change with community patterns 04.11.2015 University, Oldenburg, Deutschland Pomati Francesco; Fontana Simone;
IBZ general assembly, ETH Poster Individual-level trait diversity and classical species-level metrics: a complementary approach to better explain ecosystem functioning 03.11.2015 Zurich, Schweiz Fontana Simone; Pomati Francesco;
The next generation of biodiversity research: theory, traits and methods Vortrag im Rahmen einer Tagung Trait-based approaches in aquatic biodiversity research 07.10.2015 Berlin, Deutschland Pomati Francesco;
Symposium for European Freshwater Sciences Vortrag im Rahmen einer Tagung Individual-level trait diversity and classical species-level metrics explain ecosystem functioning in a complementary approach 05.07.2015 Geneva, Schweiz Pomati Francesco; Fontana Simone;
ASLO meeting Vortrag im Rahmen einer Tagung Individual-level trait diversity concepts and metrics are complementary to the classical species-level approach in explaining ecosystem functioning 22.02.2015 Granada, Spanien Fontana Simone; Pomati Francesco;
Biology15 Poster Individual-level trait diversity and classical species-level metrics explain ecosystem functioning in a complementary approach 12.02.2015 Dubendorf, Schweiz Fontana Simone; Pomati Francesco;
GLEON 16 Vortrag im Rahmen einer Tagung Understanding phytoplankton dynamics using in situ scanning flow cytometry 27.10.2014 Orford, Kanada Pomati Francesco;
GLEON 16 Poster Individual level trait diversity indices to describe the multi-dimensional trait space 27.10.2014 orford, Kanada Pomati Francesco; Fontana Simone;
38th International Symposium on Environmental Analytical Chemistry Vortrag im Rahmen einer Tagung Understanding phytoplankton community dynamics using in situ high-resolution automated monitoring 16.06.2014 lausanne, Schweiz Pomati Francesco;
invited seminar Einzelvortrag Understanding and predicting phytoplankton dynamics using in situ automated monitoring of algal cells and their growth environment 11.12.2013 University, Mondsee, Österreich Pomati Francesco;


Veranstaltungen zum Wissenstransfer

Aktiver Beitrag

Titel Art des Beitrags Titel des Artikels oder Beitrages Datum Ort Beteiligte Personen
Naturschutzverein Fällanden JAHRESPROGRAMM 2016 Vortrag 17.03.2016 Fällanden, Schweiz
Greifensee-stiftung Bei der Eawag zu Besuch Vortrag 20.10.2015 dubendorf, Schweiz
Data analysis in aquatic monitoring Workshop 16.01.2014 Woerden, Niederlande


Kommunikation mit der Öffentlichkeit

Kommunikation Titel Medien Ort Jahr
Referate/Veranstaltungen/Ausstellungen Aquaprobe – a swimming laboratory on lake Greifensee: Discover the power of microbes! Deutschschweiz 2016
Referate/Veranstaltungen/Ausstellungen Greifensee, Bei der Eawag zu Besuch Deutschschweiz 2015
Video/Film The music of swinging phytoplankton communities International 2015

Verbundene Projekte

Nummer Titel Start Förderungsinstrument
159660 Critical dynamics in phytoplankton communities? 01.09.2015 Interdisziplinäre Projekte
147654 In-situ Sensing Tools for Understanding Rapid Microscale Plankton Dynamics 01.01.2014 Sinergia
121331 AquaProbe: from Monitoring towards Understanding, Predicting and Managing Plankton in changing Aquatic Ecosystems 01.07.2008 R'EQUIP

Abstract

Aim- The purpose of this research proposal is test the relative importance of natural selection, stochastic population dynamics and within-lake dispersal on the composition and diversity of phytoplankton communities, using an individual trait-based approach.Background- Individual level variability in traits and small-scale spatial and temporal dynamics are a common feature of all heterogeneous environments, but they are among the least-understood and hardest-to-measure aspects that influence biodiversity of natural communities. The variation among individuals in populations provides the raw material for natural selection and can change the outcome of ecological interactions. Patchiness in the distribution of organisms affects important ecological processes including selection, drift, dispersal and the overall maintenance of biodiversity. For example, thin layers of phytoplankton in lakes are important hotspots of ecological and evolutionary activity, but are difficult to measure over ecologically and evolutionary relevant time scales. Neutral theory is a good starting point for modelling how dispersal affects diversity in multiple patches, and for how trait variability might respond to environmental heterogeneity. There is an enormous gap, however, between such models and empirical data. Neutral (stochastic) effects are empirically understudied, lacking a proper assessment of ecological drift in the context of evolving algal metacommunities and how this interacts with the different habitats that make up the heterogeneous environment of a stratified lake's water column. There is a pressing need for more field-oriented studies that combine theory with the experimental manipulation of processes affecting biodiversity in order to firmly place scientific hypotheses and results in a natural context.Research plan- Our goals are to (1) develop new theory relating individual-based trait variation to biodiversity dynamics and (2) test theoretical predictions using high-frequency monitoring of phytoplankton communities and in-situ experiments. Recent developments of our research offer: a neutral-network model of phytoplankton metacommunity dynamics over the water column of a deep lake; an automated monitoring technology that provides data with high-resolution spatio-temporal dynamics of phytoplankton individuals, their traits and their growth environment; and a field method to experimentally manipulate phytoplankton communities in their natural lake environment. For (1), we will test the relationship between individually measured trait variability and taxonomic diversity in phytoplankton, and use a neutral-network metacommunity model to fit individual-based monitoring time-series. For (2), we will use factorial experiments with natural communities in the field to test the interaction between a) environmental heterogeneity and ecological drift, b) environmental heterogeneity and internal dispersal, and c) the effects of trait variability among individuals and stochasticity. We will study a) drift within patches, b) phytoplankton metacommunity diversity, and c) compare observations and predictions from the neutral-network model.Impact- Several key elements distinguish this research from previous work, including: (i) a testable spatio-temporal individual-level theory of metacommunity dynamics, (ii) measures of biodiversity based on individually expressed phenotypic traits, and (iii) field experiments based on mesocosms featuring natural populations and communities. Our combined approach will advance the basic and applied knowledge on how deterministic (predictable) and stochastic (unpredictable) processes interact to structure intra and inter-species biodiversity.
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