全新世中期以来黄土高原中部生物多样性研究

根据孢粉分析、古文献记载、生物地名考证以及对现今物种群多样性等方面的研究资料，结合气候变迁，论述了全新世以来，在自然和人为因素影响下，黄土高原中部地区景观和生物多样性的演变过程及其恢复和保护措施。

STUDY ON BIODIVERSITY IN CENTRIAL REGION OF LOESS PLATEAU SINCE MID-HOLOCENE

The present paper deals with evolution, recovery and protective measures of landscape and biodiversity under the influence of natural factor and mankind in central region of the Loess Plateau since mid-Holocene. The climate was warm and moist in mid-Holocene, biological species were abundant, they had north sub tropic distinguishing characteristic; the climate was get-ting dry and cool in late-Holocene, subtropic species withdraw from this place; as mankind have not reasonably used them in later years, forests were destroyed, a part of forest animal completely disappeared. We ought to take model by original land-scape and ecosystem, create fit ecotope so as to recover and protect existence and multiplication of biodiversity.