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Luca Bragazza

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Related publications (41)

Subfossil peatland trees as proxies for Holocene palaeohydrology and palaeoclimate

Luca Bragazza

Due to the scarcity of reliable and highly resolved moisture proxies covering much of the Holocene, there has been increased interest in the study of living and subfossil peatland trees sensitive to gradual and extreme changes in hydrology, precipitation, ...

Elsevier Science Bv2016

Increasing the Perspectives of Engineering Undergraduates on Societal Issues through an Interdisciplinary Program

Ambrogio Fasoli, Denis Gillet, Antonin Danalet, Ingrid Le Duc, Alexis Berne, Luca Bragazza, Delphine Preissmann, Samuel Bendahan, Siara Ruth Isaac, Roland John Tormey, Jérome Feige, Isabelle Barbara Marie-Hélène Cardia, Adrian Christian Holzer

To tackle the challenges of the 21st century, future scientists and engineers have to understand the interplay between societal challenges and technical solutions as early as possible in their education. They also have to develop the communication and the ...

Tempus Publications2016

Loss of testate amoeba functional diversity with increasing frost intensity across a continental gradient reduces microbial activity in peatlands

Alexandre Buttler, Luca Bragazza, Mariusz Lamentowicz, Robert Thomas Edmund Mills, Constant Signarbieux, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek, Maaike Louise Hofsommer

Soil microbial communities significantly contribute to global fluxes of nutrients and carbon. Their response to climate change, including winter warming, is expected to modify these processes through direct effects on microbial functions due to osmotic str ...

Elsevier2016

Persistent high temperature and low precipitation reduce peat carbon accumulation

Alexandre Buttler, Luca Bragazza, Constant Signarbieux, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek, Remy Jean Henry Albrecht

Extreme climate events are predicted to become more frequent and intense. Their ecological impacts, particularly on carbon cycling, can differ in relation to ecosystem sensitivity. Peatlands, being characterized by peat accumulation under waterlogged condi ...

Wiley-Blackwell2016

Peatland vascular plant functional types affect dissolved organic matter chemistry

Alexandre Buttler, Adrian Pulgarin, Luca Bragazza, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek, Remy Jean Henry Albrecht, Samuel Thomas Gabriel Hamard

Northern peatlands are large repositories of carbon. Peatland vascular plant community composition has been functionally associated to a set of biogeochemical processes such as carbon cycling. Yet, we do not fully understand to what extent vascular plant f ...

Springer2016

Environmental drivers of carbon and nitrogen isotopic signatures in peatland vascular plants along an altitude gradient

Alexandre Buttler, Luca Bragazza, Konstantin Svetlozarov Gavazov

Peatlands are important sinks of atmospheric carbon (C) that, in response to climate warming, are undergoing dynamic vegetation succession. Here we examined the hypothesis that the uptake of nutrients by different plant growth forms (PGFs) is one key mecha ...

Springer2016

Experimental warming interacts with soil moisture to discriminate plant responses in an ombrotrophic peatland

Alexandre Buttler, Edward Mitchell, Cédric Pochelon, Luca Bragazza, Pierre Rémi Mariotte, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek

QuestionA better understanding of the response of Sphagnum mosses and associated vascular plants to climate warming is relevant for predicting the carbon balance of peatlands in a warmer world. Open-top chambers (OTCs) have been used to investigate the eff ...

Wiley-Blackwell2015

Linking soil microbial communities to vascular plant abundance along a climate gradient

Alexandre Buttler, Edward Mitchell, Luca Bragazza, Richard David Bardgett

The ongoing expansion of shrub cover in response to climate change represents a unique opportunity to explore the link between soil microbial communities and vegetation changes. This link is particularly important in peatlands where shrub expansion is expe ...

Wiley-Blackwell2015

An unexpected role for mixotrophs in the response of peatland carbon cycling to climate warming

Alexandre Buttler, Enrique Lara, Edward Mitchell, Bertrand Fournier, Luca Bragazza, Robert Thomas Edmund Mills, Constant Signarbieux, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek

Mixotrophic protists are increasingly recognized for their significant contribution to carbon (C) cycling. As phototrophs they contribute to photosynthetic C fixation, whilst as predators of decomposers, they indirectly influence organic matter decompositi ...

Nature Publishing Group2015

Plant functional types define magnitude of drought response in peatland CO2 exchange

Luca Bragazza, Bjorn Jozef Maria Robroek

Peatlands are important sinks for atmospheric carbon (C), yet the role of plant functional types (PFTs) for C sequestration under climatic perturbations is still unclear. A plant-removal experiment was used to study the importance of vascular PFTs for the ...

Ecological Soc Amer2014

Alien plant species distribution in the European Alps: influence of species' climatic requirements

Luca Bragazza

The paper provides the first estimate of the role of abiotic and anthropogenic variables driving both alien plant species richness and composition covering the whole region of the European Alps. To establish and spread in a new area, alien plants must be a ...

Springer Verlag2014

Indirect effects of experimental warming on dissolved organic carbon content in subsurface peat

Alexandre Buttler, Luca Bragazza, Vincent Eric Jules Jassey

The peatland carbon store is threatened by climate change and is expected to provide positive feedback on air temperature. Most studies indicate that enhanced temperature and microbial activities result in a rise of dissolved organic carbon (DOC) as a cons ...

Springer Heidelberg2014

Microclimatological consequences for plant and microbial composition in Sphagnum-dominated peatlands

Luca Bragazza, Bjorn Jozef Maria Robroek

In three Scandinavian peatlands we studied to what extent plant and microbial community compositions are governed by local-scale microhabitat, with a special interest in the effect of aspect (i.e. exposition of slopes). Despite differences in solar irradia ...

Finnish Environment Inst2014

Seasonal patterns of testate amoeba diversity, community structure and species-environment relationships in four Sphagnum-dominated peatlands along a 1300 m altitudinal gradient in Switzerland

Alexandre Buttler, Edward Mitchell, Luca Bragazza, Mariusz Lamentowicz, Vincent Eric Jules Jassey

Altitudinal gradients are useful to study the potential effects of climate change on ecosystems. Historically, studies on elevation gradients have primarily focused on macro-organisms and ecosystem processes, while microorganisms have been mostly ignored d ...

Pergamon-Elsevier Science Ltd2013

Biogeochemical plant-soil microbe feedback in response to climate warming in peatlands

Alexandre Buttler, Luca Bragazza, Julien Parisod, Richard David Bardgett

Peatlands act as global sinks of atmospheric carbon (C) through the accumulation of organic matter(1), primarily made up of decay-resistant litter of peat mosses(2). However, climate warming has been shown to promote vascular plant growth in peatlands, esp ...

Nature Publishing Group2013

Snow cover manipulation effects on microbial community structure and soil chemistry in a mountain bog

Alexandre Buttler, Luca Bragazza, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek

Alterations in snow cover driven by climate change may impact ecosystem functioning, including biogeochemistry and soil (microbial) processes. We elucidated the effects of snow cover manipulation (SCM) on above-and belowground processes in a temperate peat ...

Springer Netherlands2013

Glasshouse vs field experiments: do they yield ecologically similar results for assessing N impacts on peat mosses?

Alexandre Buttler, Edward Mitchell, Luca Bragazza

Peat bogs have accumulated more atmospheric carbon (C) than any other terrestrial ecosystem today. Most of this C is associated with peat moss (Sphagnum) litter. Atmospheric nitrogen (N) deposition can decrease Sphagnum production, compromising the C seque ...

2012

Plant traits across different habitats of the Italian Alps: a comparative analysis between native and alien species

Luca Bragazza

While it is well known that the success of alien plants in new environments greatly depends on their functional traits, to date only a few other studies have tested whether coexisting alien and native species show converging or diverging functional attribu ...

2012

High nitrogen deposition alters the decomposition of bog plant litter and reduces carbon accumulation

Alexandre Buttler, Jonathan Habermacher, Luca Bragazza

Bogs are globally important sinks of atmospheric carbon (C) due to the accumulation of partially decomposed litter that forms peat. Because bogs receive their nutrients from the atmosphere, the world-wide increase of nitrogen (N) deposition is expected to ...

2012

Climatic modifiers of the response to nitrogen deposition in peat-forming Sphagnum mosses: a meta-analysis

Alexandre Buttler, Edward Mitchell, Luca Bragazza

Peatlands in the northern hemisphere have accumulated more atmospheric carbon (C) during the Holocene than any other terrestrial ecosystem, making peatlands long-term C sinks of global importance. Projected increases in nitrogen (N) deposition and temperat ...

Wiley-Blackwell2011

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