PLANT DIVERSITY IN THE PROCESS OF SUCCESSION OF ARTIFICIAL VEGETA- TION TYPES AND ENVIRONMENT IN AN ARID DESERT REGION OF CHINA
PLANT DIVERSITY IN THE PROCESS OF SUCCESSION OF ARTIFICIAL VEGETA- TION TYPES AND ENVIRONMENT IN AN ARID DESERT REGION OF CHINA
复制标题
DOI：
--
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Li Xin
中科院分区：
文献类型：
--
作者：
Li Xin
包兰铁路沙坡头段人工植被防护系统是我国干旱荒漠区治理荒漠的成功典范。本文对该系统人工植被建立和演替过程中的生物多样性进行了研究。经过40年的演替，人工植被的物种组成达到了动态平衡，植物多样性随群落演替而增加，人工植被建植40 a后，多样性指数达到D =0 70 6 ~0 82 2或H′ =1 393~1 893，建群后10年的多样性指数仅为D =0 5 0 10 70 2或H′ =0 819~1 0 74。β多样性格局表明，沙坡头地区人工植被经历了两个物种更新速率较高的时期，这些过程与植被的自然演替模式密切相关，对干旱荒漠区生态条件的恢复和人工绿洲植被的建立起着重要作用。文中还介绍了土壤条件改善对植物多样性的影响提出了
The artificial vegetation protection system of the Shapotou section of the Baotou Lanzhou railway is a successful model for desert control in arid desert region in China.This paper addresses biodiversity in the process of the establishment and succession of artificial vegetation in this system.The species composition of artificial vegetation was observed to reach homeostasis after 40 years of succession,and plant diversity increased with community succession.The diversity index of the artificial vegetation reached D =0 706~0 822 or H′ =1 393~1 893 after 40 years of establishment,while the diversity index was only D =0 501~0 702 or H′ =0 819~1 074 at 10 years from establishment. β diversity patterns indicate that artificial vegetation of Shapotou region has come through two periods of relatively high species turnover rates,which were closely correlated with natural patterns of vegetation succession.These processes play an important role in the recovery of ecological condition in this arid desert region as well as in the establishment of artificial oasis vegetation.Data on the influence of improved soil condition on plant diversity is also presented.