A5086171990- Climate change and permafrost
- Soil Carbon and Nitrogen Dynamics
- Peatlands and Wetlands Ecology
- Cryospheric studies and observations
- Ecology and Vegetation Dynamics Studies
- Plant Water Relations and Carbon Dynamics
- Polar Research and Ecology
- Microbial Community Ecology and Physiology
- Geology and Paleoclimatology Research
- Botany and Plant Ecology Studies
- Tree-ring climate responses
- Forest Management and Policy
- Plant Ecology and Soil Science
- Amazonian Archaeology and Ethnohistory
- Forest Ecology and Biodiversity Studies
- Soil and Water Nutrient Dynamics
- Soil and Unsaturated Flow
- Plant responses to elevated CO2
- Isotope Analysis in Ecology
- Rangeland Management and Livestock Ecology
- Agriculture and Rural Development Research
- Coastal wetland ecosystem dynamics
- Pasture and Agricultural Systems
- Cassava research and cyanide
- Land Use and Ecosystem Services
Abisko Scientific Research Station
2016-2024
Umeå University
2016-2024
Swiss Federal Institute for Forest, Snow and Landscape Research
2013-2024
École Polytechnique Fédérale de Lausanne
2011-2022
Impact
2022
Vrije Universiteit Amsterdam
2009
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 (inorganic and/or organic) and nitrogen (N) application rates (i) soil physicochemical properties, (ii) microbial earthworm communities (iii) production. Our results showed that organic carbon content was increased by incorporation residues (+2.45%) farmyard manure (+6.40%) in comparison to use mineral fertilizer alone. contrast,...
Abstract Arctic and alpine tundra ecosystems are large reservoirs of organic carbon 1,2 . Climate warming may stimulate ecosystem respiration release into the atmosphere 3,4 The magnitude persistency this stimulation environmental mechanisms that drive its variation remain uncertain 5–7 This hampers accuracy global land carbon–climate feedback projections 7,8 Here we synthesize 136 datasets from 56 open-top chamber in situ experiments located at 28 arctic sites which have been running for...
Abstract The decomposition of large stocks soil organic carbon in thawing permafrost might depend on more than climate change-induced temperature increases: indirect effects via altered bacterial community structure (BCS) or rooting patterns are largely unexplored. We used a 10-year situ thaw experiment and aerobic incubations to investigate alterations BCS potential respiration at different depths, the extent which they related with each other root density. Active layer strongly differed,...
Abstract Treelines advance due to climate warming. The impacts of this vegetation shift on plant–soil nutrient cycling are still uncertain, yet highly relevant as availability stimulates tree growth. Here, we investigated nitrogen (N) and phosphorus (P) in plant soil pools along two tundra–forest transects Kola Peninsula, Russia, with a documented elevation birch‐dominated treeline by 70 m during the last 50 years. Results show that although total N P stocks soil–plant system did not change...
Climate change can alter peatland plant community composition by promoting the growth of vascular plants. How such vegetation affects carbon dynamics remains, however, unclear. In order to assess effect on uptake and release, we performed a plant-removal experiment in two Sphagnum-dominated peatlands that represent contrasting stages natural succession along climatic gradient. Periodic measurements net ecosystem CO2 exchange revealed plants play crucial role assuring potential for uptake,...
Abstract The frequency of freezing events during the early growing season and vulnerability to plants in European high‐altitude environments could increase under future atmospheric climate change. We tested sensitivity 10 species, from four plant functional types (PFTs) spanning three growth forms (PGFs), a long‐term situ CO 2 enrichment (566 vs. 370 ppm) 2‐year soil warming (+4 K) experiment at treeline Swiss Alps (Stillberg, Davos). By additionally tracking phenology, we distinguished...
Dinitrogen fixation by cyanobacteria is of particular importance for the nutrient economy cold biomes, constituting main pathway new N supplies to tundra ecosystems. It prevalent in cyanobacterial colonies on bryophytes and obligate associations within cyanolichens. Recent studies, applying interspecific variation plant functional traits upscale species effects ecosystems, have all but neglected cryptogams their association with cyanobacteria. Here we looked species-specific patterns that...
Gavazov, K. S., A. Peringer, Buttler, F. Gillet, and T. Spiegelberger. 2013. Dynamics of forage production in pasture-woodlands the Swiss Jura Mountains under projected climate change scenarios. Ecology Society 18(1): 38. https://doi.org/10.5751/ES-04974-180138
Tundra ecosystems hold large stocks of soil organic matter (SOM), likely due to low temperatures limiting rates microbial SOM decomposition more than those accumulation from plant primary productivity and necromass inputs. Here we test the hypotheses that distinct tundra vegetation types their carbon supply characteristic rhizosphere microbes determine cycling independent temperature. In subarctic Scandes, used a three-way factorial design with paired heath meadow at each two elevations,...
Abstract. Soil organic matter (SOM) plays an important role in the global carbon cycle, especially alpine ecosystems. However, ongoing forest expansion high-elevation systems potentially alters SOM storage through changes (OM) inputs and microclimate. In this study, we investigated effects of Picea abies L. afforestation chrono-sequence (0 to 130 years) a former subalpine pasture Switzerland on soil (SOC) stocks dynamics. We found that SOC remained constant throughout chrono-sequence, with...
The pressure of climate change is disproportionately high in mountainous regions, and small changes may push ecosystem processes beyond sensitivity thresholds, creating new dynamics carbon nutrient cycling. Given that the rate organic matter decomposition strongly dependent upon temperature soil moisture, respiration to both metrics highly relevant when considering soil–atmosphere feedbacks under a changing climate. To assess effects mountain pasture system, we transplanted turfs along an...
Drought impacts soil organic carbon (SOC) cycling. Yet, there is limited understanding of how water limitation affects C inputs from rhizosphere, which contribute to new SOC formation while fueling microbial communities. We quantified and losses roots mycorrhizal fungi after two decades irrigation in a dry Scots pine forest using 13C-enriched ingrowth bags. Fungal bacterial communities the bags adjacent soils were analyzed by Illumina MiSeq sequencing.In first year, was stimulated addition...
Snow-farming is one of the adaptive strategies used to face snow deficit in ski resorts. We studied impact a shifting snow-farming technique on pasture slope Adelboden, Switzerland. Specifically, we compared plots covered by compressed pile for 1.5, 2.5 or 3.5 years, which then recovered from cover three, two vegetation seasons, respectively, with control situated around pile. In >1.5 years pile, plant mortality was high, recovery very slow, and few species recolonized bare surface. Soil...