[1] A simplistic model of grass-shrub dynamics was used to investigate the role of grass demographic processes on grassland-shrubland dynamics when grasses are in competitive advantage over shrubs. The model suggests that a feedback between grass biomass and soil erosion may cause an abrupt transition to a shrubland state. The model explains how a simple change in either grass recruitment or gr...

Zaedyus pichiy (Desmarest, 1804) is a small armadillo commonly known as pichi. Like all armadillos, it bears a carapace of ossified dermal scutes covered by epidermal scales, but it is the only species that bears marginal scutes with sharply pointed apices. This diurnal, semifossorial species inhabits xeric shrublands and grasslands on sandy soils from central Argentina and Chile south to the S...

The basis for the interpretation of fossil-pollen assemblages in terms vegetation and climate is present-day relationship to pollen rain. Detailed modern spectra from Tibetan Plateau are described here explore between rain vegetation. Two hundred thirty four (234) surface samples were collected moss polsters, top soil, lake sediments forests, shrublands, shrub meadows, steppes, deserts Plateau....

Aims of the study: To construct biomass weight equations for rockrose (Cistus laurifolius L.) shrublands in North-central Spain comparing different methodologies and evaluating applicability current Spanish open PNOA-LiDAR data.
 Area The growing extension Mediterranean associated with a high wildfire risk climate change scenario is considered relevant source energy use bioproducts. Quanti...

A large reservoir of bioavailable nitrogen (up to approximately 10(4) kilograms of nitrogen per hectare, as nitrate) has been previously overlooked in studies of global nitrogen distribution. The reservoir has been accumulating in subsoil zones of arid regions throughout the Holocene. Consideration of the subsoil reservoir raises estimates of vadose-zone nitrogen inventories by 14 to 71% for wa...