维普中文期刊产品整合服务
2篇 您的检索式:作者名="Mike Starr"
    题名 作者 年代 出处 被引量
1Influence of topographic aspect on floristic diversity, structure and treeline of afromontane cloud forests in the Bale Mountains,Ethiopia显示文摘We studied the influence of east and west aspects on floristic composition, diversity, structure and treeline of afromontane cloud forests at Rira in the Bale Mountains, southeast Ethiopia. In addition, we studied how aspect relates to and/or interacts with other topographic and edaphic factors in influencing vegetation diversity. Stratified systematic plot sampling was used to survey the floristic composition, diversity and structure of forests on east- and west-facing slopes. The sample plot size was 20 × 20 m and a total of 36 plots were inventoried. A total of 72 composite soil samples were collected and analysed.Woody species richness of the forest on the east-facing slope was 1.7 times higher than on the west-facing slope.Shannon, Simpson and Log-series alpha diversity indices and evenness of forests on the east-facing slope were significantly higher than on the west-facing slope. NMDS ordination indicated that the east- and west-facing slopes formed two clusters of species and aspect explained 55.2 % and 10.4 % of the variation in species richness and abundance, respectively. There was no significant difference between aspects in stand structure except in dominant height, which was higher on the east-facing slopes. There was significant interaction between aspect and elevation in influencing woody species diversity. The four plant community groups, which were identified using cluster and indicator species analysis were represented differently on the east and west aspects. The treeline on the east-facing slope(3352 m) was located about 110 m higher than on the west-facing slope(3240 m). Soil moisture deficiency was unlikely to be a limiting factor on either site. Near the equator, east–west aspect was shown to have considerable impact on floristic composition, diversity, structure, and treeline position of montane forests. Diurnal cloud movement patterns and its impact on microclimate of slope aspect should be taken into account in future studies of cloud forest diversity, structure, and treeline position.Eshetu Yirdaw Mike Starr Mesele Negash Fantaw Yimer 2015Journal of Forestry Research2015,26,4:4
2Key site variables governing the functional characteristics of Dissolved Natural Organic Matter (DNOM) in Nordic forested catchments显示文摘Rolf D. Vogt Jarkko Akkanen Dag Olav Andersen Rainer Brüggemann Bimal Chatterjee Egil Gjessing Jussi V. K. Kukkonen H?kon E. Larsen J?rg Luster Andrea Paul Stephan Pflugmacher Mike Starr Christian E. W. Steinberg Philippe Schmitt-Kopplin ádám Zsolnay 2004Aquatic Sciences2004,,2:1
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费