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Regional nitrogen budgets and riverine N & P fluxes for the drainages to the North Atlantic Ocean: Natural and human influences
We present estimates of total nitrogen and total phosphorus fluxes in rivers to the North Atlantic Ocean from 14 regions in North America, South America, Europe, and Africa which collectivelyExpand
Peatlands and the carbon cycle: from local processes to global implications - a synthesis
Although peatlands cover only 3% of the Earth's land surface, boreal and subarctic peatlands store about 15?30% of the world's soil carbon as peat. Despite their potential for large positiveExpand
Nitrogen-use efficiency : a biologically meaningful definition?
A parameter to measure the efficiency of nitrogen use should include 1) the mean residence time of the N in the plant, ie the period during which the absorbed N can be used for C-fixation; and 2) theExpand
Raised atmospheric CO2 levels and increased N deposition cause shifts in plant species composition and production in Sphagnum bogs
Part of the missing sink in the global CO2 budget has been attributed to the positive effects of CO2 fertilization and N deposition on carbon sequestration in Northern Hemisphere terrestrialExpand
Persistent negative effects of pesticides on biodiversity and biological control potential on European farmland
Of the 13 components of intensification the authors measured, use of insecticides and fungicides had consistent negative effects on biodiversity, and organic farming and other agri-environment schemes aiming to mitigate the negative effects are found. Expand
The influence of savanna trees on nutrient, water and light availability and the understorey vegetation
In an East African savanna herbaceous layer productivity and species composition were studied around Acacia tortilis trees of three different age classes, as well as around dead trees and in open grassland patches, suggesting that water competition between trees and grasses was important. Expand
Diversity-productivity relationships: initial effects, long-term patterns, and underlying mechanisms.
Results from 4 consecutive years of a plant diversity experiment without legumes show that a positive relationship between plant species richness and productivity emerged in the second year and strengthened with time, and show that increased nutrient use efficiency at high species richness is an important underlying mechanism. Expand
Consequences of biodiversity loss for litter decomposition across biomes
Reducing the functional diversity of decomposer organisms and plant litter types slowed the cycling of litter carbon and nitrogen, and the emergence of this general mechanism and the coherence of patterns across contrasting terrestrial and aquatic ecosystems suggest that biodiversity loss has consistent consequences for litter decomposition and the Cycling of major elements on broad spatial scales. Expand
Agri-environment schemes do not effectively protect biodiversity in Dutch agricultural landscapes
Management agreements were not effective in protecting the species richness of the investigated species groups: no positive effects on plant and bird species diversity were found and there is a pressing need for a scientifically sound evaluation of agri-environment schemes. Expand
Unveiling below-ground species abundance in a biodiversity experiment: a test of vertical niche differentiation among grassland species
The first application of a DNA-based technique that quantifies species abundances in multispecies root samples is presented, showing that the observed root responses are consistent with species-specific root recognition responses and thus may ultimately be responsible for the higher productivity at high plant species diversity. Expand