Filters: Tags: FACE (X)4 results (55ms)
Warming prevents the elevated CO 2 -induced reduction in available soil nitrogen in a temperate, perennial grassland
Rising atmospheric carbon dioxide concentration ([CO2]) has the potential to stimulate ecosystem productivity and sink strength, reducing the effects of carbon (C) emissions on climate. In terrestrial ecosystems, increasing [CO2] can reduce soil nitrogen (N) availability to plants, preventing the stimulation of ecosystem C assimilation; a process known as progressive N limitation. Using ion exchange membranes to assess the availability of dissolved organic N, ammonium and nitrate, we found that CO2 enrichment in an Australian, temperate, perennial grassland did not increase plant productivity, but did reduce soil N availability, mostly by reducing nitrate availability. Importantly, the addition of 2 Â°C warming...
Categorical discrimination of human facial expressions by pigeons: A test of the linear feature model
Fusobacterium necrophorum and Actinomyces pyogenes associated facial and mandibular abscesses in blue duiker.