查询词典 ecosystem

Emergy Analysis created by Odum is a new method to evaluate natural capital and ecosystem services .

介绍了Odum的能值分析理论对传统能量分析方法的新发展。

T. Odum emergy analysis method, this paper studies the changes of agro-ecosystem emergy after cropland to grassland conversion.

T。 Odum能值分析方法，分析退耕还草前后农业生态系统的能值变化。

Odum emergy analysis method,this paper studies the changes of agro-ecosystem emergy after cropland to grassland conversion.

以甘肃省镇原县北庄村为例，应用H.T.Odum能值分析方法，分析退耕还草前后农业生态系统的能值变化。

Odum, a famous American ecologist, the research quantitatively evaluated the conversion project's ecological and economic effects in Ansai County through analyzing the dynamic change of ecosystem energy value.

Odum创立的能值理论和方法，以安塞县为例，通过分析该区域退耕还林实施前后生态系统投入产出的能值动态变化，定量评价了退耕还林工程的生态经济效应。

Eugene Odum, one of the founders of the science of ecology, stated:"Any unit that includes all of the organisms (ie: the "community") in a given area interacting with the physical environment so that a flow of energy leads to clearly defined trophic structure, biotic diversity, and material cycles (ie: exchange of materials between living and nonliving parts) within the system is an ecosystem."

一位生态科学的奠基人，说过：&任何单位，它包括某一地区内所有的生物体，这些生物体同自然环境相互作用引起能量的流动，从而生成营养结构、生物多样性和物质循环（如：有生命体和无生命体之间的物质转化），这样的单位就是生态系统。&

The plant floating-bed technology application in Miaojia river showed that the water quality of the plant foating-bed technology applied had preceded evidently than the comparing water, though the water quantity was exchanged largely. There existed a micro-ecosystem at the root aera of floating-bed plant which mainly consists of organic grain, algae, zooplankton, zoobenthos. The mode of "Oenanthe javanica -Ipomoea aqutica" floating-bed mode application realized the whole year run of plant foating-bed technology on polluted water. Hence, the mode is suggested in the following application.

植物浮床技术在苗家河的示范应用研究说明：在水量交换较大的情况下植物浮床技术仍然使示范河段水质优于对照段；浮床植物根际区存在着以有机颗粒、藻类、浮游动物、底栖动物为网络骨干的根系微生态系统：&水芹菜-水蕹菜&浮床模式可实现四季净化污染河水的周年运转，在后续应用中推荐使用此模式。

These studies cover all areas of molecular, cellular, organistic, population, and ecosystem aspects of marine biology.

对海洋生物学的研究覆盖了分子、细胞、器官、种群和生态系统各方面的所有领域。

Cu was mainly associated with the oxidable fraction and the residual fraction, at the propriety geochemistry conditions, it may be released into the environment, certain threat will be formed to the periphery ecosystem.

Cu形态以有机结合态和铁锰氧化物结合态为主，在适当的地球化学条件下，可能被重新释放进入环境中，对周围的生态系统构成一定的威胁。

Research on bioturbation is very important to roundly and exactly understand the processes of biogeochemical cycles in marine sediments, accurately reconstruct the records of palaeogeography, palaeoclimatology and palaeoecology, reasonably adjust and control the biodiversity of seabed ecosystem.

海底生物扰动作用的研究，对于全面、精确地掌握海洋中各种物质的生物地球化学循环过程，正确回溯古气候、古海洋和古生态记录，合理调节和控制海底生态系统的多样性具有十分重要的意义。

Patuxent's scientists have been responsible for many important advances in natural resource conservation, especially in such areas as migratory birds, wildlife population analysis, waterfowl harvest, habitat management, wetlands, coastal zone and flood plain management, contaminants, endangered species, urban wildlife, ecosystem management, and management of national parks and national wildlife refuges.

其研究涉及自然资源保护的许多学科，尤其是候鸟、野生动植物数量分析、水禽、生境管理、湿地、海滨区和雨林区管理、污染物、濒危物种、城市野生动物、生态系统管理、国家公园和自然保护区管理。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。