Publications by authors named "G Jakobs"
High-elevation ecosystems are among the few ecosystems worldwide that are not yet heavily invaded by non-native plants. This is expected to change as species expand their range limits upwards to fill their climatic niches and respond to ongoing anthropogenic disturbances. Yet, whether and how quickly these changes are happening has only been assessed in a few isolated cases.
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- Climate change is causing plant species in mountains worldwide to shift their elevational ranges, complicating efforts to monitor these changes due to varying sampling methods.
- The Mountain Invasion Research Network (MIREN) developed a standardized protocol to assess native and non-native plant distributions along elevation gradients over time, using surveys conducted every five years at specific sites.
- Initial results show unique elevational patterns for native plant richness and a global decline in non-native species, highlighting disturbed areas like road edges as hotspots for plant invasions, emphasizing the need for more global studies to guide conservation efforts.
High-Resolution Tritium Profile in an Ice Core from Camp Century, Greenland.
Environ Sci Technol
October 2021
We measure H in an ice core from Camp Century. The temporal distribution of H concentration in the ice core corresponds generally well with the historical record of explosive yields of atmospheric nuclear weapons tests. Maximum H values observed in 1962-1963 are comparable to those in ice core or precipitation in many other locations in the Northern Hemisphere.
View Article and Find Full Text PDFBackground: Humans and environmental organisms are constantly exposed to complex mixtures of chemicals. Extending our knowledge about the combined effects of chemicals is thus essential for assessing the potential consequences of these exposures. In this context, comprehensive molecular readouts as retrieved by omics techniques are advancing our understanding of the diversity of effects upon chemical exposure.
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- Chemicals can change the way genes are expressed in organisms, which helps us understand the effects of chemical exposure on health and the environment.
- The study aimed to develop methods to analyze these gene expression changes over time and different concentrations of chemicals, creating a standardized way to interpret toxicogenomic data.
- By applying their approach to zebrafish embryos exposed to specific chemicals, the researchers identified key gene responses and related them to developmental processes, paving the way for better risk assessment of chemical hazards.