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- mean trophic level 平均营养级
- Producer The first TROPHIC LEVEL, in a food chain. 生产者：食物链中第一个营养级。
- These microscopic organisms are assigned a trophic level (TL) of 1. 这些微生物的营养级为1。
- 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。
- Effects of volatiles from different trophic level on foraging behavior of Aphidius avenae. 不同营养层次挥发物对燕麦蚜茧蜂寄主搜寻行为的影响。
- A photosynthetic green plant or chemosynthetic bacterium, constituting the first trophic level in a food chain; an autotrophic organism. 生产者，自养有机体构成食物链上的第一级营养层次的可进行光合作用的绿色植物或化能合成的细菌；自养有机体
- Finally, the trophodynamics and pharmacokinetics of DDTs, HCB and PAHs were also investigated in this food web and the high trophic level animals. 在对二恶英类物质研究的同时，本研究调查了有机氯、六氯苯和多环芳烃类物质的食物网传递行为和高等生物体内的毒理动力学过程，得到了这些物质的食物网放大系数和代谢速率。
- Ecology A photosynthetic green plant or chemosynthetic bacterium, constituting the first trophic level in a food chain; an autotrophic organism. 生产者，自养有机体：构成食物链上的第一级营养层次的可进行光合作用的绿色植物或化能合成的细菌；自养有机体
- The percentage of usable chemical energy transferred as biomass from one trophic level to the next is called ecological efficiency . 当生物量从一个营养水准到下一个叫做生态的效率时，可使用化学的能源的百分比转移。
- A photosynthetic green plant or chemosynthetic bacterium,constituting the first trophic level in a food chain;an autotrophic organism. 生产者，自养有机体构成食物链上的第一级营养层次的可进行光合作用的绿色植物或化能合成的细菌;自养有机体
- At each link in this food chain we can recognize three pathways to the next trophic level: decomposition, parasitism and predation. 在这种食物链的每一个连接，我们能够辨别出通向下一个营养级的三条途径：分解、寄生和捕食。
- 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。
- Birds are positioned at high trophic level within the food web in the ecosystem, and thus any changes within the system can affect the birds in one way or another. 鸟类在生态系统中处于较高的营养级，生态系统中住何一个环节的变化都可能对鸟类造成一定的影响。
- Conclusion: the results indicated that rhGH can improve trophic level, accelerate rehabilitation speed and shorten length of stay for patient after hepatobiliary surgery. 结论：肝胆外科手术后加用生长激素能提高患者营养水平，加快患者康复速度，缩短住院时间。
- Trophic level In complex natural communities, organisms whose food is obtained from plants by the same number of steps are said to belong to the same trophic or energy level. 营养水平：在自然界复杂的生物圈中，有机体以植物为基础一层层获得食物，其经历得层次数即为该有机体的营养水平。
- According to the feeding type, we can divide fish species into benthic feeders and pelagic feeders.The activity in pelagic feeders increases with the increase of trophic level. 若将鱼种依食性分为底栖掠食及上层掠食之鱼种，则上层掠食之鱼种其体内之活性随营养阶层增加而增加。
- Food, food chains, food-webs and trophic levels consist of a system, termed the“ food system”. 食物、物链、物网以及由此构成的营养级组成“食物系统”。
- This results in an increasing concentration of insecticide in organisms at the higher trophic levels. 这就导致在更高营养级上的有机体中，农药的浓度增加。
- Pyramid of biomass A type of ecological pyramid based on the total amount of living material at each trophic level in the community, which is normally measured by total dry weight or calorific value per unit area or volume, and shown diagrammatically. 生物量金字塔：指基于群落每个营养水平上有生命的物质总量的一种生态金字塔类型，通常通过总干重或者每单位面积或体积的生热量值来衡量，并用图表表示出来。
- The ecological features of phytoplankton community were preliminarily studied in the Taihu Lake.The trophic level and saprobic degree of the lake were evaluated in whole and in sub areas respectively. 通过太湖浮游植物群落生态学的研究,对太湖春季水质污染及富营养化进行总评及分区评价。
