%0 Journal Article
%T MAIN CHARACTERISTICS OF LITTLEDALEA RACEMOSA ALPINE STEPPE IN QINGHAI XIZANG(TIBET)PLATEAU<br>青藏高原扇穗茅高寒草原的基本特点
%A Guo Ke
%A <br>郭柯
%J 植物生态学报
%D 1995
%I Editorial Office of Chinese Journal of Plant Ecology
%X Littledalea racemosa is one of the endemic grass species distributed only in the Qinghai- Xizang Plateau. and mainly within the alpine beIt between 4400- 4900m above sea level. The distribution area of the alpine steppe dominated or co- dominated by L. racemosa is delineated by the Kunlun Mountains in the north. the Tuotu- ohe river in the south. and the Hoh xil Mountains in the west.The steppe community is relatively poor in species. only 34 species being recorded in the 8 investigated plots.The 61.8%of the species are of Qinghai-Xizang Plateau geographic elements. and more than half (also 61.8%)of species belongs to the hemicryptophytes.Most of species are perennial with exceptions of 2 prostrate shrubs and I annual. Based on the species composition and structure of the investigated com- munities. at least 4 community- types of the alpine steppe were distingui- shed.they were the L. racemosa dominated steppe. the L. raccmosa and Carcx moorcrojtii co- dominated steppe. the L. racemosa and Astragalus conf- ertus(A. polycladus)c0-dominated steppe. and the L. racemosa and Stipa purpurea co- dominated steppe. The difference of soil texture and structure were the principal reason for formation of these community-types.
%K Littledarca racemosa
%K alpine steppe<br>扇穗茅
%K 高寒草原
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=2F2173CCFF292BF447DC2681EA33BBAE&aid=54371CF07DA3BF04826A5BE17644C383&yid=BBCD5003575B2B5F&vid=2A8D03AD8076A2E3&iid=38B194292C032A66&sid=FBA00558C57D9C11&eid=01622E3E475F966C&journal_id=1005-264X&journal_name=植物生态学报&referenced_num=4&reference_num=4