物种多样性

Momer M%Abd El-Ghani%Wafaa M Airier Soil-vegetation relationships in a coastal desert plain of soumem Sinai,Egypt 10.1016/S0140-1963(02)00318-X Journal of Arid Envimnments , 2003,4

张林静%岳明%顾峰雪%张远东%潘晓玲%赵桂仿新疆阜康绿洲荒漠过渡带植物群落物种多样性与土壤环境因子的耦合关系应用生态学报， 2002，6

Detailed investigation and research on flora of powdery mildew fungi will provide not only basic information to prevent damage from powdery mildews and protect the species diversity, but also samples for studying biology and phylogeny of these fungi.

因此对白粉菌区系进行详细的调查和研究，不仅能为植物白粉病的有效防治和物种多样性保护提供基础资料，而且还能为开展白粉菌生物学、菌物系统演化等相关研究提供标本素材。

Rivaling rain forests in diversity of life, coral reefs are at risk from overfishing, pollution, and disease.

珊瑚礁的物种多样性可与热带雨林相比，但它们处在过度捕捞、污染和病害的威胁之下。

Besides, investigations on plant species diversity、forest crown density、incidence extent、gradient and exposure of 3 forest communities were taken,while dilution heat method and semi-micro Macro Kjeldahl method were used to determine the content of organic matter and nitrogen in soil.

调查了3个油松林群落的物种多样性、林分郁闭度、油松毛虫发生程度、坡度及坡向。

The transition zone of desert plant communities generally has high level of species diversity and relatively low degree of ecological dominance.

荒漠植物群落过渡地带一般具有较高的物种多样性和较低的生态优势度。

Species diversity in three types of vegetation were relatively higher in August, and lower in May. Species diversity of vegetation was highest in the reconverted grazing land, lower in the semi-fixed dune land, and lowest in the natural reconverted farmland. The stability of vegetation in the reconverted grazing land was relatively high and strong buffering function to changing environment among three types of vegetation.

放牧自然恢复地植被的物种多样性相对较高，半流动沙地相对较低，退耕自然恢复地最低，这说明相对于半流动沙地和退耕自然恢复地，放牧自然恢复地稳定性相对较高，对环境波动的缓冲功能强。

The main aim of the present study was to address: 1 the photosynthetic characteristics and the biomass allocation traits of spring ephemerals and 2 the relationship between these traits and unique growth pattern of thes.

准噶尔荒漠分布的早春短命植物不仅具有十分独特的生物学特点，而且在荒漠植物群落演替、物种多样性维持及土壤改良与防治水土流失等方面具有重要的生态学价值。

Aims Spring ephemerals characterized by very short-term growth rhythm and specific biological traits in the Junggar Desert of China play an important role in succession of the desert plant community, maintenance of the desert biological diversity and conservation of water and soil in desert.

准噶尔荒漠分布的早春短命植物不仅具有十分独特的生物学特点，而且在荒漠植物群落演替、物种多样性维持及土壤改良与防治水上流失等方面具有重要的生态学价值。

The density of the foot 、middle part and top are 124grain /m~2、91 grain /m~2、66 grain /m~2,the seeds is more little windward than the leeward.The density of seed banks in windward is 81grain/m~2 and the leeward density is 100grain/m~2.The seed of ephemerals bourgeoning reaches the pinnacle on April and May.The diversity of different parts sand dune is different,but the differences do not reach the marked level.The similarity is high between the seed banks and the vegetation.

迎风坡种子库密度比背风坡面少，迎风坡种子库平均密度为81粒/m2，而背风坡种子库平均密度为100粒/m2；短命植物种子在4月上旬达到萌发高峰，沙丘不同部位物种多样性存在差异，土壤种子库和地上植被存在较高的相似性，此外短命植物在沙丘不同部位的分布存在较高的空间异质性。

Epiphytic lichens, an important component of epiphytes, play vital roles in biodiversity sustainability, water and nutrient cycling in forest ecosystems.

附生地衣是森林附生植物的重要类群之一，在维护森林生态系统的物种多样性以及水分和养分循环等方面发挥着重要作用。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。