一、生态系统能量流动的起点和总能量生态系统中能量的源头是阳光,生态系统的能量流动是从生产者把太阳能固定在它们所制造的有机物中开始的,因此生态系统中能量流动的起点是生产者。流经生态系统的总能量是生产者固定的太阳能的总量。 First, the starting point and total energy of the ecosystem energy flow The source of energy in the ecosystem is the sunlight, the energy flow of the ecosystem starts from the producers fixing the solar energy in the organic matter they make, and therefore the starting point of the energy flow in the ecosystem Is a producer The total energy flowing through the ecosystem is the total amount of solar energy fixed by the producer.