Geodiversity impacts plant community structure in a semi-arid region.

Geodiversity refers to the variety of geological and physical elements as well as to geomorphological processes of the earth surface. Heterogeneity of the physical environment has an impact on plant diversity. In recent years, the relations between geodiversity and biodiversity has gained attention in conservation biology, especially in the context of climate change.

The effects of elevated CO and nitrogen nutrition on root dynamics.

Ambient CO concentration is currently 400 μmol mol, and projections forecast an increase up to 970 μmol mol by century's end. Elevated CO can stimulate C3 plant growth, whereas nitrogen is the main nutrient plants acquire from soils and often limits growth. Plants primarily obtain two nitrogen sources from the soil, ammonium (NH) and nitrate (NO).