<正>On December22,2010,an E-mail by Dr.Elena Raevskaya,the manager of Asia and Africa Section,All-Russian Institute of Scientific and Technical Information(VINI
This paper analyzed the data of temperature and precipitation in Minqin,typical desert area in north-west China,during the period of 1961 2007 by linear regress
The biodiversity-productivity relationship is an important topic in the research of bio- diversity and ecosystem function. The plant diversity-productivity patt