演替

Based on these, this study was to determine the relationship between standing vegetation and soil seed bank. The main results are as follows: 1 Effects of grazing on plant communities The grazing successions were Stipa klemenzii → Salsola collina + Stipa klemenzii → Salsola collina community in the desert steppe; Stipa grandis or Leymus chinensis → Cleistogenes squarrosa + Stipa krylovii or Stipa grandis → Potentilla acaulis + Cleistogenes squarrosa community in the typical steppes and Leymus chinensis + forbs →Leymus chinensis + Stipa baicalensis community in the meadow steppe.

主要结论如下： 1放牧对植物群落的影响荒漠草原的放牧演替规律为小针茅群落→猪毛菜+小针茅群落→猪毛菜群落；典型草原为羊草或大针茅群落→糙隐子草+大针茅群落或克氏针茅群落→星毛委陵菜+糙隐子草群落；草甸草原为羊草杂类草群落→羊草+贝加尔针茅群落，这是不同物种对牧压的不同适应结果造成的。

The annual average density was 14.63 per hectare in saline algae zone, 7.50 per hectare in Scirpus marqueter/Scirpus triqueter zone and 1 .59 per hectare in reed zone;(4) The avian community similarity in between adjoining stages of vegetation succession was higher than that in between apart stages.

对不同季节的植被演替阶段鸟类群落相似性进一步比较发现，任何一个季节S_1和S_3的值均分别大于S_2；(5)鸟类群落的多样性与群落中优势种华东师范大学2004届硕L学位论文中文摘要所占的数量比例呈负相关。

Influenced by strong wind of northeastern monsoon, the crest line and mountaintop are mostly covered by the windward dwarf sclerophyllous forest except for some early-seral grassland.

在研究区域内，因冬季受东北季风的影响，稜线及山顶部分的植群除了演替早期的草原外，多为受风冲影响的硬叶矮林。

The Artemisia species examined are well adapted to dry areas through both anatomical and ecological strategies explaining their important role as the pioneer indigenous plants in the seral succession of Loess hills.

这些特征均能说明这些蒿类植物具有很好的抗旱适应性，作为环境改造的先锋物种，它们在当地的自然植被恢复演替中起着积极的正向推动作用。

This results indicated that peashrub shrubland created a favorable N condition for its invading the meadow and being invaded by birch forest, and played a important role in altering the successional direction of meadow→peashrub shrub land →birch forest.

尽管箭叶锦鸡儿灌丛植物叶片与凋落物中全N、全P浓度在大多数取样点上都低于硕桦，但表层土中全N浓度高于硕桦和草甸，且其土壤有机质的供氮能力以及维持氮素能力都高于硕桦林和草甸，表明，锦鸡儿灌丛为侵入草甸和硕桦入侵提供了良好的养分条件，在该演替序列的发展过程中起了一定的推动作用。

Under disturbances, original tropical seasonal rainforest has been replaced by several secondary vegetations experiencing progressive succession among which Sterculia nobilis pure forest and mixed forest of S. nobilis and Pteroceltis tatarinowis are best flourished.

但现存植被则是原生植被受不同程度干扰后形成的多种次生植被类型，且都处于向上演替的过程之中，保存最好的是苹婆纯林及其与青檀组成的混交林。

According to species richness, Shnnon-Weiner indexand sterve of diversity-area, we study on the dynamics of species diversity of the secondary succesional communities of evergreen broaded-leaved forests on Jinyun mountain about ten years.

采用物种丰富度 S和物种多样性香农指数H、物种均匀度指数J以及多样性-面积曲线研究缙云山常绿阔叶林次生演替序列物种多近十年的变化。

According to species richness, Shnnon-Weiner indexand sterve of diversity-area, we study on the dynamics of species diversity of the secondary succesional communities of evergreen broaded-leaved forests on Jinyun mountain about ten years.

采用物种丰富度S和物种多样性香农指数H、物种均匀度指数J以及多样性-面积曲线研究缙云山常绿阔叶林次生演替序列物种多样性近十年的变化。

This paper studied the distribution,flora,physiognomy,construction,regeneration and succession dynanic of Tilia mongolica forest in Wulingshan mountain and advanced measure of protecting and managing forest community.

为了加强天然林保护，在标准地调查和统计计算的基础上，分析研究了雾灵山蒙椴落叶阔叶混交林群落的分布、区系成分、外貌特点、结构特征和群落的更新演替规律，并提出了群落的经营保护措施。

The objectives of the study were to: 1 reveal the responses of vegetation and soil to degradation by investigating community characteristics and soil physic-chemical properties; 2 quantify the contributions of human factors and natural factors and the relationship among the factors by analyzing the variation of each factor in past decades; 3 understand the succession of fenced undegraded meadow, artificial pasture, semi-artificial pasture and degraded meadow, and to 4 provide suggestions for restoration and rehabilitation of the degraded rangeland in the region.

本项研究旨在通过对黄河源区退化高寒草甸的植物群落特征和土壤特征调查，揭示植物和土壤养分对土地退化的响应；对源区人口及牲畜数量和国内生产总值，气候变化特点等因子的分析，量化人为干扰因子和自然因子的贡献率以及各因子之间的数量关系；以及对草地退化驱动力分析以及原生草地植被封育、人工草地、半人工草地的自然演替变化规律的研究，为高寒草甸退化草地恢复与重建提供科学依据。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。