查询词典 ecosystem

Moreover, Brameld recognized the need for valuing ecosystem, environment, and global perspectives, as well as the culturological approach of teacher education. Recently, those issues have been got more and more attentions in American and around the world.

此外，Brameld对於生态、环境与全球观点的主张、文化学取向的师资培育观，至今不但在美国也是全球所关注的重要议题，足见其独到且敏锐之眼。

Species richness and Pielou evenness index were used to measure species diversity. Species richness in polluted area was 32-67, while in control area it was 47-82. Pielou evenness index of tree layer was 0.1161-0.8509, while those of shrub layer and herb layer were 0.1763-0.3249 and 0.0443-0.2601, respectively. The results showed that both species richness and Pielou evenness index were influenced by the point source pollution. Species importance values showed significant differences between polluted area and control area. Dominance of different species had changed, and some species even disappeared under the pressure of pollution, indicating a process of species replacement in plant communities. Such species replacement can provide a scientific basis for species selection for restoration of human-damaged ecosystem. The natural regeneration of Quercus variabilis was insensitive to pollution, while Cupressus funebris was effected seriously.

仅在污染区中出现的物种数量远低于仅在对照区中出现的物种数量；(2)可分出4种基本的群落类型：马尾松林、柏木林、栓皮栎林和马尾松＋栓皮栎林，各群落特定层次的物种丰富度指数以及Pielou均匀度指数在污染区与对照区之间存在显著差异；(3)污染胁迫下，物种在群落中的生态优势度发生了变化，反映了群落中不同物种相互替代的过程，这种物种的替代可为今后受损生态系统人为恢复过程中物种的筛选提供一定的理论参考；(4)对群落中王要物种更新的调查发现：栓皮栎林对污染不敏感；柏木林污染区与对照区幼苗数量及分布格局均有明显差异，污染条件下群落未来演替受到严重干扰。

Habitat utilization of root vole was studied in the region of Haibei Alpine Meadow Ecosystem Research Station, the Chinese Academy of Sciences, from July to September of 2002 and 2003. Three indexes of activity intensities, runway length, runway branch number and burrow entrance number were used to estimate root vole's utilization intensities on four types of habitats, manual cultivated land, true meadow, swamp meadow and Dasiphora fruticosa shrub.

为研究根田鼠对不同类型栖息地的利用强度，于2002-2003年的7-9月在中国科学院海北高寒草甸生态系统定位站地区采用样方法测定了4种类型栖息地（人工耕作地、真草甸、沼泽化草甸、金露梅灌丛）中的3个根田鼠活动强度变量（跑道长度、跑道分叉数、洞口数）。

The study on hydrological process and nutrient dynamics of Dendrocalamus latiflorus stand ecosystem was conducted in Nanjing National Forest Farm, Fujian Province.

在福建省南靖国有林场的小山城工区设置试验地，进行了麻竹林生态系统水文特征和养分动态研究。

Zoology environment aggravation basically behaves the resource that it is water rare be short of and development uses rate low; extensive cultivate course of study to make quality of agricultural zoology environment deteriorates quickly; prairie ecosystem suffers excessive depasture wait for a reason to destroy serious, natural prairie produces structural sex decline, vegetation productivity is reduced significantly.

生态环境恶化主要表现为水资源稀缺且开发利用程度低；粗放型的种植业使农业生态环境质量迅速退化；草原生态系统受过度放牧等原因破坏严重，天然草原发生结构性衰退，植被生产力显著降低。

It was concluded that the increase in the diphenol concentration strongly affected the microbial life in this ecosystem.

因此，二酚类化合物浓度的增加将严重影响该土壤生态系统中的微生物活性。

However, as a result of human activity especially moorland is reclaimed, the aggravate that uses favourable geographical position waiting for earth of chemical fertilizer to use an activity in great quantities, and large-scale disafforest and habitat are broken the change that spends favourable geographical position waiting for earth to use structure, played havoc with natural landscape, the change moves floral to live environment, make ecosystem function degrades, brought about the forfeiture of biology diversity finally.

然而，由于人类活动尤其是荒地开垦、化肥的大量使用等土地利用活动的加剧，以及大规模砍伐森林和栖息地破碎化等土地利用格局的改变，严重破坏了自然景观，改变动植物的生存环境，使生态系统功能退化，并最终导致了生物多样性的丧失。

Those three classes of ecosystem are:(1) peak cluster-narrow valley system;(2) karst hill, stone forest, peak clusler-wide valley, shallow depression system;(3) peak cluster-deep depression, dolina system.

因此，西南喀斯特山区生态系统的划分应将人类活动干扰程度和喀斯特地貌所造成的差异结合起来进行。

The structure of entomogenous fungus communities of the artificial forest ecosystem of pure Masson's pines in Magushan was investigated, and 3 families, 6 genera and 14 species were found.

对麻姑山马尾松纯林的虫生真菌群落进行了调查研究，共发现了3科6属14种。

The structure of entomogenous fungus communities of the artificial forest ecosystem of pure Masson's pines in Magushan was investigated, and 3 families, 6 genera and 14 species were found.

摘 要：对麻姑山马尾松纯林的虫生真菌群落进行了调查研究，共发现了3科6属14种。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷