营养水平

Micrura and C. vicinus, were related to increased trophic level of the lake water.

浮游甲壳动物群落体长的上升由优势种体长的上升所导致，其中微型裸腹溞与近邻剑水蚤体长的上升与水体营养水平的上升关系密切。

The first and lowest trophic level contains the producer, green plants that convert solar energy to food by photosynthesis.

第一层或称最底层营养水平包括生产者——通过光合作用将光能转化成为化学养料的绿色植物。

The results showed that with the decrease of nutrient level, the allelopathic effects of the volatile oil increased significantly.

结果表明，随着营养水平的降低，胜红蓟挥发油对受试植物的化感作用明显增强。

Compared with the colonial characteristic of benthic algae in different conditions, the results of this study indicate that nutrient concentrations and temperature strongly influenced the course of colonization.

比较不同条件下底栖藻类的建群特征，结果发现：营养水平和温度均对底栖藻类的建群过程有重要影响。

The effects of different nutritional condition on the growth and antioxidant enzyme activity of submerged macrophytes Myriophyllum spicatum L, Hydrilla verticillata L and Ceratophyllum demersum L. were investigated in this study.

模拟研究了沉水植物狐尾藻Myriophyllum spicatum L、轮叶黑藻Hydrilla verticillata L和金鱼藻Ceratophyllum demersum L在中、富两种营养水平下的生长及生理特性。

The contents of protein and chlorophyll of Hydrilla verticillata. L is lower, but those of Myriophyllum spicatum L and Ceratophyllum demersum L raised steadily in the same condition, which indicated that those two submerged macrophytes have the stronger tolerance for nutrition than Hydrilla verticillata L.

通过对3种沉水植物可溶性蛋白和叶绿素质量分数的分析发现，黑藻在中富两种营养水平下，质量分数较低且波动平稳，金鱼藻和狐尾藻可溶性蛋白和叶绿素质量分数持续升高，表明这两种沉水植物对水体中营养盐的耐受能力较黑藻强。

During the experimental conditions, the activitys of SOD, POD and MDA of Ceratophyllum demersum L changed greatly, and raised rapidly in the late of experiment, which indicated that those two submerged macrophytes got more nutrient stress than Myriophyllum spicatum L, and the nutritional stress-resistant ability of Myriophyllum spi-catum L was higher than those two submerged macrophytes in the medium nutritional condition.

在本试验条件下，黑藻生物量小，而金鱼藻SOD活性、POD活性和MDA质量分数变化幅度大，在试验后期急速上升，表明这两种沉水植物受到的营养盐胁迫较狐尾藻大，而狐尾藻在中营养水平下的耐营养盐胁迫能力较强。

What's more, the hybrids remained the dominant Daphnia species decades after pollution control measures brought nutrient levels back to normal.

此外，杂交物种数十年间依旧保持着优势地位，运用污染控制措施使营养水平恢复正常。

The study focus on the distribution patterns of modern and fossil benthic foraminiferal fauna and their relationship with environmental variables, and the physical and chemical properties of the deep water.

本项目以西太平洋边缘中、深层水体为对象，利用微体古生物学、生物地球化学和年代学方法，通过对现代底栖有孔虫分布特征及其环境控制因子、柱状岩芯中底栖有孔虫属种和形态类型的分布特征、底层水体的温度及营养水平、各主要古环境演化事件时期浮游和底栖有孔虫14C年代学特征等主要内容的研究，综合探索了晚第四纪以来西太平洋边缘中层和深层水体的性质和流通状况的演化史。

OBJECTIVE To evaluate the effects of n-3 fatty acids on immunologic function and level of nutrition in critical patients.

［目的］探讨添加不饱和脂肪酸营养液对危重病人免疫功能和营养水平的影响。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。