物种多样性

The Kalidium cuspidatum community was not stable and it preponderant tree was declining because of the lower index of species diversity and higher index ecological dominance.

盐爪爪群落物种多样性指数低，而生态优势度高，群落不稳定，盐爪爪种群处于衰败阶段，也是不稳定的。

The species richness of the spider was abundant, and Agelenidae, Thomisidae, Linyphiidae, and Lycosidae were the dominant groups.

嶂石岩风景区蜘蛛物种多样性丰富，漏斗蛛、蟹蛛、皿蛛和狼蛛是该地区的优势类群。

The ecological relationship of species, community and environment of Vitex negundo L .var .heterophylla communities were studied by using TWINSPAN and DCA.

本文应用TWINSPAN分类和DCA排序相结合的方法，研究了荆条群落的物种多样性、植物群落与环境的生态关系。

The soil water content、available phosphorus、soil bulk density、total porosity、noncapillary porosity、total nitrogen also affected the species diversity.

土壤含水率、有效磷含量、土壤容重、孔隙度和全氮含量也对草本层物种多样性有一定的影响。

Orchidaceae ; geographical zone ; species diversity ; Fujian Province

兰科植物；地理分区；物种多样性；福建省

The species diversity index of the Potaninia mongolica community was higher than that of three other communities and lower than that of Oxytropis bicolor community, and Potaninia mongolica, its dominant tree was stabile, therefore the community was a stabile community.

绵刺+珍珠猪毛菜+泡泡刺群落物种多样性指数比较高，生态优势度也较高，该群落比较稳定，其建群种的绵刺种群同样处于稳定阶段，所以群落是比较稳定的。

The results show that the construction of the railway has an obvious effect on the warm steppe,but the characteristics of community,such as the coverage,ecological dominance and species richness of communities have been improved after its natural restoration,and some species,such as Elymus nutans,Aconitum gymnandrum and Thermopsis lanceolata,play an important role in the restoration communities.An assistant measure taken by human beings will benefit to the restoration.There is no any evidence of exotic invading plants in the restoration of the warm steppe in the study area.

结果显示，青藏铁路修筑过程对铁路两侧一定区域的温性草原有较大影响，但随着受影响区域植被的自然恢复，群落盖度、生态优势度和物种多样性等反应群落特征的指标都有一定程度的改善，一些在原生植被中很少出现或伴生种在恢复后的群落中有可能成为群落的优势种或建群种，如露蕊乌头和鹅绒委陵菜等；人为辅助措施将有利于受损植被的恢复；修筑铁路过程中受到影响的温性草原其恢复过程中尚未出现外来入侵植物。

Natural restoration of vegetation is an important approach to ecological restoration. The detailed investigation showed that the succession trend was quiet different under different site conditions. Stipa bungeana Trin dominated on south facing slopes and mountain tops while Artemisia Vestita Wall and A.

以黄土高原典型沟壑区―吴旗县为例，通过对退耕或封禁后植被自然恢复过程及其物种多样性的调查分析，结果表明，在不同的空间立地条件下，植被的演替变化规律不同：阳坡与峁顶的植被演替趋向形成以长芒草为主的群落类型，而阴坡则形成以铁杆蒿和茭篙为主的群落类型。

Ulmus lamellosa ; Community characteristics ; Flora ; Species diversity

脱皮榆；群落学特征；区系；物种多样性

Most of them are representatives of the family Viviparidae and Unionidae.

研究了湘江衡阳江段软体动物的物种多样性。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。