草原

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。

In Kubuqi sandland of Erdos plateau, from 1991 to 1996, we collected the datum of 42 months about three-toed jerboa,dersert hamster, Chinese jird, striped hamster,five-toed jerboa, and ground squirrel, and we focused to describe their seasonality, inter annual change and trends by moving average and analysis of PCA.

以 1 991～ 1 996年在在中国农科院草原研究所鄂尔多斯高原沙地草场改良试验站 6年4 2个月的调查材料为基础，运用 PCA分析技术、移动平均等方法，对该地三趾跳鼠、小毛足鼠、子午沙鼠及黑线仓鼠、黄鼠及五趾跳鼠等 6个啮齿动物种群的季节性、年季动态和趋势进行了描述分析。

Large grouse of prairies and open forests of western North America.

北美西部大草原和开阔森林的大型松鸡。

The Monastery was built in 1709 by E';angzongzhe, the first-generation Jiamuyang, who came from the nearby town of Ganjia. On Jun 6th of lunar calendar, Lamas in Labrang stops the buddhist ceremony. They go to the Sangke prairie to celebrate the Xianglang festival, and stage a gymkhana of unique style.

每年农历六月初六，拉卜楞寺的喇嘛们都会暂停一切佛事活动，到距寺院10公里外的桑科草原上欢度传统的香浪节，并进行别具一格的传统体育竞赛。

Cattle, horses, sheep group foraging habitat, grazing Cukuang were singing clear and the sound of bullwhip, the integration of the enchanting birds, but also for the simple addition of grassland infinite vitality.

牛群、马群、羊群群栖觅食，放牧人粗旷的歌声和清脆的长鞭声，融合着悦耳动听的鸟声，更给朴实的草原增添了无限的生机。

"Ah," said the expert entomologists. The classic savanna butterfly is Edwards hairstreak.

"啊，"内行的昆虫学家说，典型的稀树草原蝴蝶是爱德华兹灰蝶。

The mapping analyze shows that there are mainly 7 ecosystems including rollinghill/loessial soil/farmland ecosystem, rollinghill/loessial soil/hassock grass steppe ecosystem, plain/loessial soil/farmland ecosystem, sandy land ecosystem etc.

制图分析得出陕西段主要生态系统有丘陵黄绵土农田生态系统、丘陵黄绵土丛生禾草草原生态系统、平原黄绵土农田生态系统、沙地生态系统等。

It is the only alpine long-term ecological research site in Taiwan. Bimonthly insect collection was conducted from November 1998 to March 2002 at the three sampling plots, including spruce forest, hemlock forest and meadow at Tatachia LTER site in the Yushan National Park.

本实验从1998年11月至2002年3月，在塔塔加高山地区长期生态研究(Long Term Ecological Rearch； LTER)研究区进行两个月一次的昆虫定期调查，样区选定在云杉林、铁杉林及箭竹草原等三个永久样区内，调查方法包括日间扫网调查和夜间灯光诱集。

I determined that densities and biomass of herbivorous mammals in Nagarahole were comparable to some of the best East African Savannah areas.

我在这里发现，食草哺乳动物的种群密度与生物量，堪与状况最好的东非大草原地区相比。

In the more arid grasslands, herding of goats, sheep and so on is a traditional method of subsistence.

在较干旱的草原上，山羊、绵羊等的放牧业才是人们传统的维生之道。

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。