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Factors affecting the ozone sensitivity of temperate European grasslands: an overview.
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Nitrogen deposition but not ozone affects productivity and community composition of subalpine grassland after 3 yr of treatment.
TLDR
Results suggest that effects of elevated O(3) on the productivity and floristic composition of subalpine grassland may develop slowly, regardless of the sensitive response to increasing N.
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Soil moisture effects determine CO2 responses of grassland species
TLDR
It is difficult to use responses to CO2 from experiments in which CO2-induced soil moisture savings occur to predictCO2 effects as long as future soil moisture regimes are not defined, and direct and indirect CO2 effects should be strictly separated.
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Grassland yield declined by a quarter in 5 years of free‐air ozone fumigation
TLDR
It is shown that a moderately elevated O3 level reduces the productivity of intact grasslands during a 5-year exposure under real field conditions, which could have negative implications for the maintenance of biological diversity in rural landscapes across large areas of Europe.
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Subalpine grassland carbon dioxide fluxes indicate substantial carbon losses under increased nitrogen deposition, but not at elevated ozone concentration
Ozone (O3) and nitrogen (N) deposition affect plant carbon (C) dynamics and may change ecosystem C‐sink/‐source properties. We studied effects of increased background [O3] (up to [ambient] × 2) and…
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Species Composition of Subalpine Grassland is Sensitive to Nitrogen Deposition, but Not to Ozone, After Seven Years of Treatment
TLDR
High N sensitivity of the subalpine grassland, but low sensitivity to O3, singly or in combination with N means any input of N above the current ambient deposition may cause a shift in the plant community composition of these ecosystems which are considered hotspots for biodiversity.
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Ozone visible symptoms and reduced root biomass in the subalpine species Pinus uncinata after two years of free-air ozone fumigation.
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Design and performance of a free-air exposure system to study long-term effects of ozone on grasslands
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Elevated ozone and nitrogen deposition affect nitrogen pools of subalpine grassland.
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Respiratory carbon loss of calcareous grasslands in winter shows no effects of 4 years’ CO2 enrichment
TLDR
It is concluded that wintertime respiration does not constitute a larger C loss from the ecosystem at elevated CO2; and the absence of respiratory responses implies no extra growing-season C inputs with month-to-year turnover times at elevatedCO2.
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