Energy Flow in Ecosystems: CCEA GCSE Biology | CCEA GCSE 生物学考点精讲：生态系统能量流动

📚 Energy Flow in Ecosystems: CCEA GCSE Biology | CCEA GCSE 生物学考点精讲：生态系统能量流动

In CCEA GCSE Biology, understanding energy flow is fundamental to explaining how ecosystems function. Energy is neither created nor destroyed, but it moves through biological systems in a unidirectional flow, originating primarily from the Sun. This guide breaks down every concept you need to master for your exam, from calculating transfer efficiency to drawing detailed pyramids of energy.

在 CCEA GCSE 生物学中，理解能量流动是解释生态系统如何运作的基础。能量既不会被创造也不会消失，但它会在生物系统中单向流动，主要源自太阳。本指南将为你分解考试需要掌握的所有概念，从计算传递效率到绘制详细的能量金字塔。

1. The Sun: The Ultimate Energy Source | 太阳：终极能量来源

Almost all energy transferred in biological systems originates from the Sun. Solar radiation provides the light energy required to power the first step of the energy flow pathway: photosynthesis. Without this constant influx of energy, ecosystems would collapse. In some extreme environments, such as deep-sea hydrothermal vents, chemical energy from compounds like hydrogen sulfide can sustain life (chemosynthesis). However, the vast majority of Earth’s ecosystems are driven by solar energy.

生物系统中几乎所有能量转移都源于太阳。太阳辐射提供了驱动能量流动路径第一步（光合作用）所需的光能。如果没有

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