A5075621626- Peatlands and Wetlands Ecology
- Plant Water Relations and Carbon Dynamics
- Soil Carbon and Nitrogen Dynamics
- Plant responses to elevated CO2
- Climate variability and models
- Soil and Water Nutrient Dynamics
- Ecology and Vegetation Dynamics Studies
- Atmospheric and Environmental Gas Dynamics
- Forest ecology and management
- Fire effects on ecosystems
- Atmospheric chemistry and aerosols
- Soil and Unsaturated Flow
- Plant Ecology and Soil Science
- Species Distribution and Climate Change
- Climate change and permafrost
- Botany and Plant Ecology Studies
- Tree-ring climate responses
- Groundwater flow and contamination studies
- Ecosystem dynamics and resilience
- Geology and Paleoclimatology Research
- Remote Sensing and LiDAR Applications
- Forest Ecology and Biodiversity Studies
- Climate Change and Environmental Impact
- Groundwater and Isotope Geochemistry
- Climate change impacts on agriculture
German Sport University Cologne
2024-2025
University of Copenhagen
2016-2024
Norwegian Institute for Water Research
2013-2018
National Research Tomsk State University
2015
Centre d'Écologie Fonctionnelle et Évolutive
2015
University of Bayreuth
2015
University of Sheffield
2015
Royal Swedish Academy of Sciences
2015
Centre National de la Recherche Scientifique
2015
Technical University of Denmark
1992-2014
Amplification of the hydrological cycle as a consequence global warming is forecast to lead more extreme intra-annual precipitation regimes characterized by larger rainfall events and longer intervals between events. We present conceptual framework, based on past investigations ecological theory, for predicting consequences this underappreciated aspect climate change. consider broad range terrestrial ecosystems that vary in their overall water balance. More are expected increase duration...
Climatic changes, including altered precipitation regimes, will affect key ecosystem processes, such as plant productivity and biodiversity for many terrestrial ecosystems. Past ongoing experiments have been conducted to quantify these potential changes. An analysis of indicates that they provided important information on how water regulates processes. However, do not adequately represent global biomes nor forecasted scenarios their contribution advance our understanding responses changes is...
Abstract Interactive effects of multiple global change factors on ecosystem processes are complex. It is relatively expensive to explore those interactions in manipulative experiments. We conducted a modeling analysis identify potentially important and stimulate hypothesis formulation for experimental research. Four models were used quantify interactive climate warming ( T ), altered precipitation amounts [doubled (DP) halved (HP)] seasonality (SP, moving July August January February create...
Field-scale experiments simulating realistic future climate scenarios are important tools for investigating the effects of current and changes on ecosystem functioning biogeochemical cycling. We exposed a seminatural Danish heathland to elevated atmospheric carbon dioxide (CO2), warming, extended summer drought in all combinations. Here, we report short-term responses nitrogen (N) cycle after 2 years treatments. Elevated CO2 significantly affected aboveground stoichiometry by increasing...
Climate change is increasing the frequency and severity of short-term (~1 y) drought events—the most common duration drought—globally. Yet impact this intensification on ecosystem functioning remains poorly resolved. This due in part to widely disparate approaches ecologists have employed study drought, variation studied, differences among ecosystems vegetation, edaphic climatic attributes that can mediate impacts. To overcome these problems better identify factors modulate responses, we...
Abstract We used a nonintrusive field experiment carried out at six sites – Wales (UK), Denmark (DK), the Netherlands (NL), Hungary (HU), Sardinia (Italy IT), and Catalonia (Spain SP) along climatic latitudinal gradient to examine response of plant species richness primary productivity warming drought in shrubland ecosystems. The treatment raised plot daily temperature by ca. 1 °C, while led reduction soil moisture peak growing season that ranged from 26% SP site 82% NL site. During 7 years...
Abstract. Soil emissions of NO and N2O were measured continuously at high frequency for more than one year 15 European forest sites as part the EU-funded project NOFRETETE. The locations represent different types (coniferous/deciduous) nitrogen loads. Geographically they range from Finland in north to Italy south Hungary east Scotland west. highest observed coniferous forests, whereas lowest deciduous forests. forests highly correlated with N-deposition. site average annual emission (82 μg...
Abstract Many serious ecosystem consequences of climate change will take decades or even centuries to emerge. Long‐term ecological responses global are strongly regulated by slow processes, such as changes in species composition, carbon dynamics soil and long‐lived plants, accumulation nutrient capitals. Understanding predicting these processes require experiments on decadal time scales. But themselves may not be adequate because many the have characteristic scales much longer than can...
Intensification of the global hydrological cycle, ranging from larger individual precipitation events to more extreme multiyear droughts, has potential cause widespread alterations in ecosystem structure and function. With evidence that incidence years (defined statistically historical records) is increasing, there a clear need identify ecosystems are most vulnerable these changes understand why some sensitive extremes than others. To date, opportunistic studies naturally occurring years,...
1 Recent findings indicate that the interactions among CO2, temperature and water can be substantial, combined effects on biological systems of several factors may not predicted from experiments with one or a few factors. Therefore realistic multifactorial involving larger set main are needed. 2 We describe new Danish climate change-related field scale experiment, CLIMAITE, in heath/grassland ecosystem. CLIMAITE is full factorial combination elevated prolonged summer drought. The...
Abstract The ongoing changes in the global climate expose world's ecosystems not only to increasing CO 2 concentrations and temperatures but also altered precipitation ( P ) regimes. Using four well‐established process‐based ecosystem models (LPJ, DayCent, ORCHIDEE, TECO), we explored effects of potential on water limitation net primary production (NPP) seven terrestrial with distinctive vegetation types different hydroclimatic zones. We found that NPP responses differed among sites within a...
A rising global population and demand for protein-rich diets are increasing pressure to maximize agricultural productivity. Rising atmospheric [CO(2)] is altering temperature precipitation patterns, which challenges While provides a unique opportunity increase the productivity of C(3) crops, average yield stimulation observed date well below potential gains. Thus, there room improving However, only fraction available germplasm crops has been tested CO(2) responsiveness. Yield complex...
Human domination of the biosphere includes changes to disturbance regimes, which push many ecosystems towards early-successional states. Ecological theory predicts that are more sensitive perturbations than mature systems, but little evidence supports this relationship for perturbation climate change. Here we show vegetation (abundance, species richness and composition) across seven European shrublands is quite resistant moderate experimental warming drought, responsiveness associated with...
Manipulation experiments are invaluable tools in global change ecology because they enable causal and process-based understanding. However, artifacts inherent limitations can lead to misinterpretations. Across the wide range of approaches set up such studies, we distill main challenges associated with imposed treatment(s), spatial time scale, proposing solutions outlining interpreting extrapolating results. The trade-offs between experimental realism (facilitating extrapolation) control...