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Article
Isotopic evidence for oligotrophication of terrestrial ecosystems
Human societies depend on an Earth system that operates within a constrained range of nutrient availability, yet the recent trajectory of terrestrial nitrogen (N) availability is uncertain. Examining patterns ...
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Article
Open AccessBiotic and abiotic drivers of tree seedling recruitment across an alpine treeline ecotone
Treeline responses to climate change ultimately depend on successful seedling recruitment, which requires dispersal of viable seeds and establishment of individual propagules in novel environments. In this stu...
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Article
Accelerated increase in plant species richness on mountain summits is linked to warming
Globally accelerating trends in societal development and human environmental impacts since the mid-twentieth century1–7 are known as the Great Acceleration and have been discussed as a key indicator of the onset ...
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Article
Responses of soil extracellular enzyme activities to experimental warming and CO2 enrichment at the alpine treeline
Climate warming and elevated CO2 can modify nutrient cycling mediated by enzymes in soils, especially in cold-limited ecosystems with a low availability of nutrients and a high temperature sensitivity of decompos...
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Article
Climate sensitivity of shrub growth across the tundra biome
Rapid climate warming has been linked to increasing shrub dominance in the Arctic tundra. Research now shows that climate–shrub growth relationships vary spatially and according to site characteristics such as...
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Article
An alpine treeline in a carbon dioxide-rich world: synthesis of a nine-year free-air carbon dioxide enrichment study
We evaluated the impacts of elevated CO2 in a treeline ecosystem in the Swiss Alps in a 9-year free-air CO2 enrichment (FACE) study. We present new data and synthesize plant and soil results from the entire exper...
