查询词典 trophic level

The next best way to quantify the amount of protoplasm in each trophic level is to weigh it.

确定每一个营养阶层原生质总量的第二个好办法是称重。

C. Only about 10% of energy in on link can be converted to organic matters in next trophic level.

一个联结中只有大约10%的能量可以被转化至下一个营养级的有机物。

Consumers in the second trophic level use the energy of the producers directly.

在第二营养级消费者直接使用的生产者产生的能量。

The relationship between constituents of one trophic level and constituents of adjacent trophic levels may be described by a food chain.

一个营养级的成员与邻近营养级的成员之间的相互关系可以用食物链来描述。

Ecologists assign every organism in an ecosystem to a feeding level,or trophic level,depending on its source of food or nutrients.

生态学家分配在生态系的每个有机体到一个哺养的水平或者食性层次，根据它的食物或营养素的来源。

"Because energy, in the form of heat, is lost at each step, or trophic level, chains do not normally encompass more than four or five trophic levels."

由于能量以热的形式在每个阶段中都有损失，因此食物链一般不超过四或五个营养级。

Ecologists assign every organism in an ecosystem to a feeding level ,or trophic level,depending on its source of food or nutrients.

生态学者认为每个生物在生态系中的哺食阶层和营养阶层它所依靠的来源是食物和营养物。

The maximization of social and economical goals results in the complexity of ecosystem being decreased, high trophic levels species being depleted, and low trophic level species being increased.

综合考虑经济、社会和生态效应的最佳管理策略能满足渔业和保育目标的平衡，有望成为最佳的管理策略。

Applying this method, Interpolation Method and Comprehensive Trophic Level Index Method to evaluate eutrophication of Chaohu Lake, the results showed that there was significant difference between this method and Interpolation Scoring Method, and the most significant difference between this method and Comprehensive Trophic Level Index Method.

该方法对巢湖富营养化的综合评价结果与插值评分法有显著差异，与综合营养状态指数法有极显著差异。

The diversity index of rotifers was the highest observed. The results show that the higher the trophic level of the lake, the higher the density diversity index of rotifers in definite trophic level range (from oligotrophic to mesotrophic).

轮虫类的多样性指数最高，并且当湖泊在一定的营养水平范围内（贫营养型向中营养型过渡）时，轮虫的密度多样性与湖泊的营养水平呈现相同的变化趋势。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。