湿地

In this paper, the degradation of forest and wetland ecosystem were studied .

本文对黄河三角洲森林生态系统退化和湿地生态系统的退化问题进行了系统的研究。

Demoiselle crane, alias Guixiu He, is a kind of large wading bird belonging to Turiformes of the family Gruidae that lived in swamp and everglade of the Northern Hemisphere. Demoiselle crane is a kind of Ⅱ safeguard wild animal in our country.

蓑羽鹤 别名闺秀鹤，属于鹤形目鹤科，是1类广泛分布在北半球湿地，栖息于沼泽或近水区的大型涉禽，被列为国家Ⅱ级重点保护野生动物川。

From the distribution maps of cranes, Red-crowned Crane, Siberain White Crane,Hooded Crane, White naped Crane are at the east part of China; Demoiselle Crane is at north of Himalayas-Crossing mountains-Qin mountain-Huai River; Black-necked Crane Qinghai-Tibet Plateau and its nearby;Common Crane has been recorded in China,except Guangxi,Guangdong,Fujian,Taiwan,Hainan Provices.

另外，在我国的西部地区有黑颈鹤、蓑羽鹤、灰鹤三种鹤分布，但较分散，相对比较集中的地区有：新疆自治区的巴音布鲁克湖区；青海省的青海湖区、三江源地区；四川省的若尔盖湿地；西藏自治区的雅鲁藏布江及其支流年楚河、拉萨河地区；云南省的西北部、东北部及贵州草海。

Neglecting the relations between water resources and the ecosystemis a fault of water resources management in the 20th century, which directly causes many questions: the degeneration of ecosystem, the demolishment of the habitat of the wild biology, the withering of the river and wetness, the degradation of the self cleaning of water bodies and so on.

忽视水资源与生态环境系统之间的关系是20世纪水资源管理的失误，直接导致生态环境的退化，引发森林退化、野生生物栖息地破坏、生物多样性减少、河湖湿地萎缩、河道断流、河川淤积、水体自净能力降低、水环境恶化和地下水位下降等诸多问题。

Using first order plug-flow reactor model, BOD5 removal rate constants of the whole wetland system were estimated to be 0.50 1/day (at 24℃) and 0.76 1/day (at 24℃) in the start-up and stable phase, respectively. These values were comparable to or even higher than the value of deoxygenation rate constant, 0.23 1/day (at 20℃), that is normally used in the river water-quality model.

由一阶柱塞流反应器模式(first order plug-flow reactor model)估算人工湿地系统启动阶段及稳定操作阶段的BOD5去除速率常数平均分别为0.50 1/day(24℃)及0.76 1/day(24℃)，相当於或甚至高於一般河川水质自净模式中的BOD5脱氧速率常数的0.232 1/day(20℃)。

Benefit choose and employ persons is versed in wet technology treats contaminative water form, use depurative water system at safety to answer fill, this alleviated greatly our country agriculture and the problem of the insecurity that use water with circumjacent city.

利用人工湿地技术处理污染水体，并将净化的水体用于平安回灌，这在很大程度上缓解了我国农业和城市周边的用水紧张新问题。

Diatom was used to monitor water quality because of its great sensitiveness to environmental changes.

硅藻的生长和繁殖对环境极为敏感，长期作为湿地水质监测的指标。

In view of Helan Mountain-Yinchuan basin is a ecological Continuum, it's innovative to put forward the holistic system of Helan Mountain-Yinchuan Basin as suitable scale for landscape management. Based on the fact that Helan Mountain-Yinchuan Basin in a circle composed by deserts and Loess Plateau,and seven vegetation ( the mountain forest belt,mountain shrub-grass belt,mountain foot desert grassland belt,oasis belt in diluvial fan plain,oasis belt in alluvial plain,wetland belt near the Yellow river, desert grassland belt in Obrdos platform) belong to the system, a"mountain-plain oasis-river-platform eco-productive paradigm"is proposed.

基于贺兰山——银川盆地是一个生态连续的复合系统，创新性地提出以整个山盆系统做为景观整体管理的尺度；基于贺兰山——银川盆地处于生态脆弱圈内山地森林带、山地灌草带、山麓荒漠草原带、洪积平原带、黄河冲积平原带、黄河滩涂湿地带、鄂尔多斯台地荒漠草原带等7个植被带的水平和垂直地带性特点，提出了贺兰山——银川盆地系统山地-平原绿洲—黄河—台地的生产生态范式。

Migrations of heavily armed Arab cattle-herders into the lusher wetlands of the Dinka at the beginning of each dry season have caused violence for decades .

每年干燥季节一开始全副武装的阿拉伯牧牛人就迁移进入牧草更丰美的丁卡湿地，这导致了几十年的暴力冲突。

Such carastrophes of marshy ground as grassland degeneration,lake dried up,soil hardended and impervious,groundwater lowering and desertification are increasingly serious in Zoigê and Hongyuan,west Sichuan which is attribusable to disrupture of local aquifers and unreasonable groundwater exploiting.

以若尔盖、红原为代表的四川西部湿地，近数十年来草场退化、湖泊干涸或缩小、软土硬结、地下水位下降、沙漠化等地质灾害日趋严重。其水文地质原因是局部含水层和水盆结构被破坏，以及不合理的抽取地下水。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。