演替

It deepens the previous view that the alteration of conodont faunas was controlled by water depth and water temperature.

这一观点深化了塔里木盆地奥陶纪牙形石动物群分区及类型演替的成因机理。

The change trends of conodont chemical elements coincide completely with that of sedimentary environments.

本文首次研究了牙形石地球化学特征，其元素含量变化趋势与环境演替相吻合。

The community succession and replacement of late Devonian and their correlation in central Hunan are discussed in more details.

本文分析了Li群落和C-H群落的生物组成，分异度，相对丰富度，生活方式及空间分布等特征；讨论了湘中晚泥盆世群落的演替和取代规律及其空间对比，进一步强调了生物与环境的密切关系及其在地层学上的意义。

The riparian zone has four-dimensional structure characteristic with portrait, diastrophism, perpendicularity and changing by time which is outcome between land and hydrophily in space. It has important function in landscape pattern.

河岸带具有四维结构特征，即纵向、横向、垂直方向和时间变化(如河岸形态变化及河岸生物群落演替)4个方向的结构，是空间内陆地——水生态系统发生直接相互作用的产物，在景观格局中有重要的作用。

According to the economic history, economic development and social progress are always accompanied with industrial structure changes.

本文认为，人类文明的演替与社会进步从来都是与产业结构的创新密切相连与互动的。

The dynamic of soil water content and salinity is significantly different among communities in ecotone.

过渡带各类型群落间土壤水盐动态存在显著差异，土壤水盐的梯度变化是群落分布和演替的根本原因。

The process and characteristics of different degenerated ecosystem types, including aquatic, everglade, island, agriculture and hill, the energy flow and matter cycle process in the typical communities in varied restoration state were studied.

对生态恢复不同阶段的典型群落的能量流动和物质循环过程，退化生态系统的演替与发展过程，进行多方面的研究。

The community is composed of 136 species belonging to 46 families and 73 genera.

群落结构特征方面的材料是研究它的分类、分布、演替和合理利用的方向所迫切需要的[2]。

To understand the mechanisms of how plants affect soil biota from a plant physiological perspective, litter exclusion, girdling and root trenching experiments were carried out to investigate the impacts of above/belowground resource inputs on soil nematode communities.

本论文研究了云南哀牢山人为干扰条件下和植物群落自然演替过程中植物群落变化对土壤线虫群落的影响，并通过去凋、环割和切根三种方法分别控制植物的地上地下资源输入，从植物生理机制的角度分析植物对土壤线虫群落的影响机制。

Vegetation ecotype tend to be xerophyte and even hyper-xerophyte and finally replaced by annual plant. Community structure and species diversity also decrease as the ecological environment worsen, In this process, the height, coverage and biomass decreases by 56.6%、 80.8% and 74.2% respectively compared to steppe, and the indices of species richness, diversity and evenness decrease by 76.4%、 56.7% and 32.0%, but β diversity indices increase by 14.6 times, especially the decease of species gregariousness and the breadth and overlay of species Niche shows that grassland tend to be more sandy and vegetation retrogression succession take place.

其中，植被生态型逐渐由中旱生向旱生、超旱生过渡，并最终被一年生植被替代；群落结构及多样性呈明显递减规律，到严重沙化阶段，草群高度、盖度、生物量与典型草原相比，下降幅度分别达到56.6%、80.8%和74.2%；物种丰富度、多样性及均匀性分别降低76.4%、56.7%和32.0%；而群落β多样性增长14.6倍，特别是多年生物种群聚度降低和生态位宽度、生态位重叠值的下降，表明草地沙化，植被发生逆行演替。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了