Publications by Konstantin Svetlozarov Gavazov

Above- and below-ground responses to experimental climate forcing in two forb species from montane wooded pastures in Switzerland

Alexandre Buttler, Konstantin Svetlozarov Gavazov

Mountain ecosystems are particularly threatened by ongoing climate change and the species composition of high elevation grasslands is already changing. An open research question is how these ecosystems will adapt to changes in their key environmental const ...

WILEY2022

Lowland plant arrival in alpine ecosystems facilitates a decrease in soil carbon content under experimental climate warming

Alexandre Buttler, Pierre Rémi Mariotte, Konstantin Svetlozarov Gavazov, Constant Signarbieux, Thomas Guillaume

Climate warming is releasing carbon from soils around the world, constituting a positive climate feedback. Warming is also causing species to expand their ranges into new ecosystems. Yet, in most ecosystems, whether range expanding species will amplify or ...

eLIFE SCIENCES PUBL LTD2022

Drought-induced decline of productivity in the dominant grassland species Lolium perenne L. depends on soil type and prevailing climatic conditions

Alexandre Buttler, Luca Bragazza, Pierre Rémi Mariotte, Konstantin Svetlozarov Gavazov, Géraldine Delphine Mercier, Constant Signarbieux, Amarante Vitra, Juan Carlos Quezada Rivera, Thomas Guillaume

2019

The Legacy Effects of Winter Climate on Microbial Functioning After Snowmelt in a Subarctic Tundra

Konstantin Svetlozarov Gavazov

Warming-induced increases in microbial CO2 release in northern tundra may positively feedback to climate change. However, shifts in microbial extracellular enzyme activities (EEAs) may alter the impacts of warming over the longer term. We investigated the ...

SPRINGER2019

Vascular plant-mediated controls on atmospheric carbon assimilation and peat carbon decomposition under climate change

Alexandre Buttler, Luca Bragazza, Konstantin Svetlozarov Gavazov, Robert Thomas Edmund Mills, Bjorn Jozef Maria Robroek, Remy Jean Henry Albrecht

2018

Seasonality alters drivers of soil enzyme activity in subalpine grassland soil undergoing climate change

Alexandre Buttler, Thomas Spiegelberger, Konstantin Svetlozarov Gavazov, Robert Thomas Edmund Mills, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek

In mountain ecosystems with marked seasonality, climate change can affect various processes in soils, potentially modifying long-term key soil services via change in soil organic carbon (C) storage. Based on a four-year soil transplantation experiment in S ...

PERGAMON-ELSEVIER SCIENCE LTD2018

Long-term in situ permafrost thaw effects on bacterial communities and potential aerobic respiration

Konstantin Svetlozarov Gavazov, Vincent Eric Jules Jassey

2018

Climate change effects on the stability and chemistry of soil organic carbon pools in a subalpine grassland

Alexandre Buttler, Thomas Spiegelberger, Konstantin Svetlozarov Gavazov, Robert Thomas Edmund Mills, Bjorn Jozef Maria Robroek

Mountain soils stock large quantities of carbon as particulate organic matter that may be highly vulnerable to climate change. To explore potential shifts in soil organic matter (SOM) form and stability under climate change (warming and reduced precipitati ...

Springer2017

Winter ecology of a subalpine grassland: Effects of snow removal on soil respiration, microbial structure and function

Alexandre Buttler, Konstantin Svetlozarov Gavazov, Robert Thomas Edmund Mills, Michael Bahn

Seasonal snow cover provides essential insulation for mountain ecosystems, but expected changes in precipitation patterns and snow cover duration due to global warming can influence the activity of soil microbial communities. In turn, these changes have th ...

Elsevier Science Bv2017

Responses of soil properties and crop yields to different inorganic and organic amendments in a Swiss conventional farming system

Luca Bragazza, Konstantin Svetlozarov Gavazov, Guillaume Blanchet

In agro-ecosystems, fertilization practices are crucial for sustaining crop productivity. Here, based on a 50-year long-term experiment, we studied the influence of fertilization practices (inorganic and/or organic) and nitrogen (N) application rates on (i ...

Elsevier Science Bv2016

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

Seasonal influence of climate manipulation on microbial community structure and function in mountain soils

Alexandre Buttler, Thomas Spiegelberger, Konstantin Svetlozarov Gavazov, Robert Thomas Edmund Mills, Bjorn Jozef Maria Robroek

Microbial communities drive soil organic matter (SOM) decomposition through the production of a variety of extracellular enzymes. Climate change impact on soil microbial communities and soil enzymatic activities can therefore strongly affect SOM turnover, ...

Pergamon-Elsevier Science Ltd2015

Transplantation of subalpine wood-pasture turfs along a natural climatic gradient reveals lower resistance of unwooded pastures to climate change compared to wooded ones

Alexandre Buttler, Thomas Spiegelberger, Konstantin Svetlozarov Gavazov

Climate change could impact strongly on cold-adapted mountain ecosystems, but little is known about its interaction with traditional land-use practices. We used an altitudinal gradient to simulate a year-round warmer and drier climate for semi-natural suba ...

Springer2014

Diminished soil functions occur under simulated climate change in a sup-alpine pasture, but heterotrophic temperature sensitivity indicates microbial resilience

Alexandre Buttler, Thomas Spiegelberger, Konstantin Svetlozarov Gavazov, Robert Thomas Edmund Mills

The pressure of climate change is disproportionately high in mountainous regions, and small changes may push ecosystem processes beyond sensitivity thresholds, creating new dynamics of carbon and nutrient cycling. Given that the rate of organic matter deco ...

Elsevier2014

Biotic and Abiotic Constraints on the Decomposition of Fagus sylvatica Leaf Litter Along an Altitudinal Gradient in Contrasting Land-Use Types

Alexandre Buttler, Thomas Spiegelberger, Konstantin Svetlozarov Gavazov, Robert Thomas Edmund Mills

Climate change can affect the process of carbon cycling and leaf litter decomposition in multiple ways, both directly and indirectly, though the strength and direction of this relationship is often context dependent. In this experiment, we followed decompo ...

Springer Verlag2014

Dynamics of Forage Production in Pasture-woodlands of the Swiss Jura Mountains under Projected Climate Change Scenarios

Alexandre Buttler, François Gillet, Thomas Spiegelberger, Konstantin Svetlozarov Gavazov, Alexander Ludwig Johannes Peringer

Silvopastoral systems of the Swiss Jura Mountains serve as a traditional source of forage and timber in the subalpine vegetation belt, but their vulnerability to land use and climate change puts their future sustainability at stake. We coupled experimental ...

Resilience Alliance2013

Subalpine Pasture-Woodlands in a Changing Climate : the Role of Land Use Type in Ecosystem Resistance to Simulated Climate Change

Konstantin Svetlozarov Gavazov

Climate change in temperate mountain systems and associated increase in temperature and decrease in precipitation are expected to have strong implications for vegetation productivity, species diversity and carbon turnover in subalpine grasslands. Little is ...

EPFL2013

Preservation of Wooded pastures in the Jura: climatic and agricultural Policy challenges

Joël Chételat, Alexandre Buttler, François Gillet, Pierre Rémi Mariotte, Thomas Spiegelberger, Konstantin Svetlozarov Gavazov, Alexander Ludwig Johannes Peringer

Agrarforschung2012

Isotopic analysis of cyanobacterial nitrogen fixation associated with subarctic lichen and bryophyte species

Konstantin Svetlozarov Gavazov

Dinitrogen fixation by cyanobacteria is of particular importance for the nutrient economy of cold biomes, constituting the main pathway for new N supplies to tundra ecosystems. It is prevalent in cyanobacterial colonies on bryophytes and in obligate associ ...

Springer Netherlands2010