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唐至元时黄土高原腹地植被变迁 被引量:4
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作者 王元林 《宁夏社会科学》 CSSCI 北大核心 2006年第2期97-101,共5页
泾洛流域居黄土高原腹地,唐宋金时期,随着气候变冷变干,加之人为屯田开发,使原来这一地区的山地森林植被减少,旱生草类和泾洛上游农田植被增加。元代虽在关中和陇东屯田,但农田植被不如前代面积广大,而草地植被有所增加。明了黄土高原... 泾洛流域居黄土高原腹地,唐宋金时期,随着气候变冷变干,加之人为屯田开发,使原来这一地区的山地森林植被减少,旱生草类和泾洛上游农田植被增加。元代虽在关中和陇东屯田,但农田植被不如前代面积广大,而草地植被有所增加。明了黄土高原腹地植被的变迁,窥斑见豹,对今天恢复这一地区的植被意义重大。 展开更多
关键词 黄土高原腹地 植被 森林 农田 旱生草类 唐宋金元
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Contribution of Study Bioecology of the Fauna Chamaerops humilis in the Region of Tlemcen (Algeria)
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作者 Damerdji Amina 《Journal of Life Sciences》 2012年第10期1158-1166,共9页
The region of Tlemcen is situated in the north-west of Algeria. The aridity of the climate had lead to the development of the matorral, a state of degradation of the Mediterranean, and the composed xerophytes plants s... The region of Tlemcen is situated in the north-west of Algeria. The aridity of the climate had lead to the development of the matorral, a state of degradation of the Mediterranean, and the composed xerophytes plants such as doum and diss, had been found. Chamaerops humilis, xerophyte plant, with special morphologic and botanic character presents a resistance of these climatic. The authors have proposed study of fauna closly linked to this plant. A faunistic inventory was realized in the Mansourah area (region of Tlemcen). Four stations have been described. Collecting sample was performed during June 2003-Mar. 2004, replying on sixteen (16) prelevements. The number of species were estimated of about 136, in which 111 are Arthropoda, the Entomofauna represented by 97 species and the other inventory are Arachnida by 8 species and Myriapoda by 6 species. 18 species are related to Gastropoda. The vertebrates are few. The importance of different groups' recolted on the Chamaerops humilis in the four stations is done particular to the insects. Analysis factorial correspondence (A.F.C) show different grouping of animal species. 展开更多
关键词 Chamaerops humilis FAUNA INVENTORY BIOECOLOGY region of Tlemcen (Algeria).
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