In this paper, the CO2 concentrations profile from 1.5 m depth in soil to 32 m height in atmosphere were measured from July 2000 to July 2001 in an alpine grass
Diversity indices and abundance distribution models are statistical tools which ecologists have applied for decades for analyzing the intrinsic regularities of
The dual-nuclei spatial structurs is composed of a regional central city,a port city and their spatial relations in certain regions.In general,this spatial stru