Publications by authors named "Daniel Ziche"
Forests are undergoing increasing risks of drought-induced tree mortality. Species replacement patterns following mortality may have a significant impact on the global carbon cycle. Among major hardwoods, deciduous oaks (Quercus spp.
View Article and Find Full Text PDFArticle Synopsis
- - The study emphasizes the importance of high-resolution annual forest growth maps, using tree-ring width (TRW) data, to better understand forest carbon sequestration and the impact of climate change and drought on forest ecosystems.
- - By integrating high-resolution Earth observation data with climate and topography information, the researchers found that species-specific models could explain over 52% of variance in tree growth, enhancing the accuracy of growth predictions compared to using just climate and elevation data.
- - The research successfully generated a map of annual TRW for 2021, demonstrating that combining different data sources can lead to more effective models for forest growth, while also identifying areas where predictions may be less reliable, particularly in climate marginal zones.
Article Synopsis
- Recent studies link delayed tree growth recovery from droughts to increased tree mortality in future droughts, raising concerns about forest health as droughts become more frequent.
- Researchers analyzed tree-ring data for 1689 oak trees to determine how climate factors, particularly precipitation, affect growth recovery after extreme droughts.
- Results revealed that while these oak species can show rapid recovery after summer droughts, they struggle to regain pre-drought growth levels after spring droughts, indicating vulnerability even in drought-tolerant species.
Global climate change is expected to further raise the frequency and severity of extreme events, such as droughts. The effects of extreme droughts on trees are difficult to disentangle given the inherent complexity of drought events (frequency, severity, duration, and timing during the growing season). Besides, drought effects might be modulated by trees' phenotypic variability, which is, in turn, affected by long-term local selective pressures and management legacies.
View Article and Find Full Text PDFForest soils represent a large carbon pool and already small changes in this pool may have an important effect on the global carbon cycle. To predict the future development of the soil organic carbon (SOC) pool, well-validated models are needed. We applied the litter and soil carbon model Yasso15 to 1838 plots of the German national forest soil inventory (NFSI) for the period between 1985 and 2014 to enables a direct comparison to the NFSI measurements.
View Article and Find Full Text PDFOrganic carbon stocks and sequestration rates of forest soils in Germany.
Glob Chang Biol
August 2014
The National Forest Soil Inventory (NFSI) provides the Greenhouse Gas Reporting in Germany with a quantitative assessment of organic carbon (C) stocks and changes in forest soils. Carbon stocks of the organic layer and the mineral topsoil (30 cm) were estimated on the basis of ca. 1.
View Article and Find Full Text PDFEffects of temperature on growth and wood anatomy were studied in young European beech (Fagus sylvatica L.) grown in 7-l pots for 2.5 years in field-phytotron chambers supplied with an ambient (approximately 400 micromol mol-1) or elevated (approximately 700 micromol mol-1) carbon dioxide concentration ([CO2]).
View Article and Find Full Text PDF