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Projekte

Microhabitat effects on N2O emissions from semiterrestrial soils
N2O emissions from soils

This project is part of the large multidisciplinary CCES project RECORD-Catchment, which investigates various aspects of river corridor management in the River Thur catchment. This SNF funded sub-project investigates factors on the microscale that govern the greenhouse gas potential of floodplain and related gleyic forest soils. This includes soil aggregation, plant - soil - microbe interactions and litter accumulations.

Verfügbare Sprachen: englisch 

Tracing nitrate in water from the forest to the aquifer using stable isotopes of oxygen and nitrogen
Tracing nitrate in water

The sources of nitrate in ground water and the transformation of nitrogen along hydrologic flow paths are investigated in a riparian zone along a restored corridor of the river Thur in Switzerland using oxygen and nitrogen isotopes in nitrate.

Verfügbare Sprachen: englisch 

Schwermetalle in Schweizer Waldböden
Schwermetalle in Waldböden

Das Ziel in diesem Projekt ist es, einen Überblick über Gehalte, effektive Mobilität und potentielle Toxizität von Schwermetallen in Schweizer Waldböden zu erhalten.

Verfügbare Sprachen: deutsch  englisch 

From Cell to Tree: the Soil
Cell-Tree-Soil

This is part of the project cluster “From Cell to Tree”. The phytostabilisation of metal contaminated soils by afforestation is investigated in a large lysimeter experiment. In this subproject, the chemical properties of the soil and how they affect roots and microorganism are studied.

Verfügbare Sprachen: englisch 

The role of root exudates in the aluminum tolerance of Norway spruce
Aluminium tolerance of spruce

Acidification of forest soils can lead to high concentrations of phytotoxic aluminium in the soil solution. In this project the hypothesis is tested that the aluminium tolerance of Norway spruce is increased by root exudation of organic acid anions that form stable complexes with the metal.

Verfügbare Sprachen: englisch 

Soil solution chemistry and soil water availability in long-term monitoring forest plots (LWF)
Soil solution in LWF plots

The chemistry of soil solution and the soil water availability for plants have been monitored since 1997 in seven forest plots in Switzerland. This project, linked to the Swiss Long-term Forest Ecosystem Research project (LWF), aims to assess the soil response to atmospheric pollution (acidifying substances and nitrogen) and to climate change.

Verfügbare Sprachen: englisch 

Nitrogen cycling in floodplain soils
Record-Rhizosphere

This project is part of the large multidisciplinary CCES project RECORD (Assessment and Modeling of Coupled Ecological and Hydrological Dynamics in the Restored Corridor of the River Thur). It deals with the role of microbial transformations and plant uptake in the cycling of nitrogen in different functional processing zones of a restored section of river Thur. The results will help to gain a better understanding of the filter function of restored river corridors and of their potential to emit greenhouse gases.

Verfügbare Sprachen: englisch 

Langfristige Waldökosystem-Forschung LWF
LWF

Der Schweizer Wald ist ändernden Umweltbedingungen ausgesetzt. Die Auswirkungen der Luftbelastung und der Klimaveränderungen auf den Wald sind wichtige Fragen, die innerhalb des Programms Langfristige Waldökosystem-Forschung LWF untersucht werden.

Verfügbare Sprachen: deutsch  englisch  französisch 

Characterization of different compacted wheel tracks by means of microbial properties in a forested site
Soil compaction

Soil compaction caused by passage of logging machinery reduces the soil air capacity. Prolonged compaction of forest soils might enhance greenhouse gas-producing microbial activities and induce a change in the soil microbial community and favour organisms capable of tolerating anoxic conditions.

Verfügbare Sprachen: englisch 

Decomposition of litter and fine roots, microbial biomass and activity on LWF-plots
Litter on LWF-plots

Decomposing plant and root litter play a crucial role in the C and N cycle of forest ecosystems. The rate of decomposition is controlled by environmental factors such as climate, litter quality, soil type and microbial activity. This long-term study investigates the litter decomposition of needle, leaf and root litter on altitudinal transects.

Verfügbare Sprachen: englisch 

Influence of above-ground stress on the metabolism of non-structural carbohydrates in poplar roots
Root carbohydrates

Roots play an important role as storage organs. Carbohydrate supply to roots is a key process linking environmental effects on shoot and changes in the growth and function of roots. In this study we use poplar (Populus tremula) as a model tree plant. Above ground stress are applied to poplar in order to modulate the carbohydrate metabolism in the roots.

Verfügbare Sprachen: englisch 

Critical Limits and Effect Based Approaches for Heavy Metals
Critical Limits Heavy Metals

Within this study critical levels of cadmium, mercury and lead in the soil matrix, soil solution, fungi, earthworms and their food sources will be determined and ecotoxicological effects on the soil microbial communities will be evaluated.

Verfügbare Sprachen: englisch 

Microbial colonization and its effects on mineral weathering (CCES-Big Link)
Microbial weathering Big Link

The CCES-BigLink project will study initial weathering in the Damma glacier forefield. In particular, suproject 2 aims to characterize the biochemical interactions between microorganisms and mineral surfaces and their influence on mineral dissolution rates.

Verfügbare Sprachen: englisch 

 

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