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能量流动是生态系统的重要功能之一,是高考的重点。在本节课中有几个容易迷惑的地方,笔者根据多年的教学经验,浅做分析,不足之处,敬请指教:一、能量传递效率是指营养级之间的传递效率自然界中的食物链和食物网是物种和物种之间的营养关系,为了使生物之间复杂的营养关系变得更加简明,以便进行定量的能流分析,生态学家提出了营养级的概念。一个营养级是指处于食物链某一环节上的所有生物种的总和,因此营养级之间的关系是指一类生物和处在不同营养层次上
Energy flow is one of the important functions of the ecosystem and is the focus of the college entrance examination. In this lesson there are a few easily confused, the author based on years of teaching experience, do shallow analysis, shortcomings, please advise: First, the energy transfer efficiency refers to the efficiency of the transfer between trophic levels in the natural food chain And food webs are nutritional relationships between species and species, ecologists have proposed the concept of trophic levels in order to make the complex nutritional relationships between organisms more succinct for quantitative energy flow analysis. A trophic level refers to the sum of all living species at some point in the food chain, so trophic levels refer to a class of organisms and to different trophic levels