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When we talk about the material cycle in an ecosystem, which of the following substances is recycled continuously? A. Plastic B. Paper C. Water D. Glass 相关知识点: 试题来源: 解析 C。解析:在生态系统的物质循环中,水是不断循环的物质。塑料、纸和玻璃不是生态系统物质循环中自然循环的物质,它们...
美 英 un.物质循环 网络材料周期 英汉 网络释义 un. 1. 物质循环 例句
However, these changes in ecosystem properties are only the indirect result of selection for different functional or demographic traits in the organisms involved. Within-cycle competition maximizes resource-use intensity, while between-cycle competition maximizes the basic reproductive rate. Therefore, the ...
3.Research on the energy conversion and material cycle in agro-ecosystem was carried out in zhangbei experimental area in the years of 1986~1988.从1986年～1988年,在张北试区进行了农业生态系统能量转化和物质循环研究。 英文短句/例句 1.On Material and Non-material Cycle based on the Recycle Econom...
Kmet, T.: Material recycling in a closed aquatic ecosystem. I. Nitrogen transformation cycle and preferential utilization of ammonium to nitrate by phytoplankton as an optimal control problem. Bull. Math. Biol. 58, 957–982 (1996) View Article MATH...
Research on the energy conversion andmaterial cyclein agro-ecosystem was carried out in zhangbei experimental area in the years of 1986~1988. 从1986年～1988年,在张北试区进行了农业生态系统能量转化和物质循环研究。 更多例句>> 2) substance cycle ...
cycle.Theflowofenergybegantogreenplantswithfixedsolar, foodchain(net)forthemobilechannel,makeallkindsof consumersintheecosystemandthedecompositioncanbethe survivaloftheenergy,atthesametime,theproducerinthe environmentofinorganicsynthesisofsugarcompoundswith ...
Carbon dynamics of broad-leaved Korean pine forest ecosystem in Changbai Mountains and its responses to climate change.长白山阔叶红松林生态系统碳动态及其对... 应用基于干物质生产理论的过程模型(Sim-CYCLE)估算了1982—2003年间长白山阔叶红松林生态系统总第一生产力(GPP),净第一生产力(NPP),净生态系统生产...
Material cycle in present ocean represents only one phase of the progressively changing ocean material cycle system, and a through evaluation of the system in different time periods under different oceanic/climatic modes is important to understand comprehensively the biological role in the global ocean ...