Firstly, they sit at the bottom of the food chain, so there are a lot of opportunistic organisms out there, including insect herbivores and microbial pathogens who want to tap into that biochemical energy that is stored in plants.

首先，它们处于食物链底层，所以有很多投机取巧的微生物存在，包括食草性昆虫和微生物病原体，它们想要利用储存在植物中的生化能量。