How Nature Works in Harmony
NoteWhat This Chapter Covers
A forest is not a collection of separate plants and animals — it is a single, interconnected web. This chapter shows how nature works as one system. We start with the habitat and its living (biotic) and non-living (abiotic) parts, climb the ladder from an individual to a population, community and whole ecosystem, and trace the flow of food through producers, consumers and decomposers in food chains and food webs. We meet the partnerships between species (mutualism, commensalism, parasitism), see how one small change ripples through the whole web, and ask what we must do to protect the ecosystems we all depend on.
Learning Outcomes
By the end of this chapter, you will be able to:
- describe a habitat and sort its biotic and abiotic components;
- order the levels individual → population → community → ecosystem, and name terrestrial and aquatic ecosystems;
- classify organisms as producers, consumers (herbivore/carnivore/omnivore) and decomposers;
- build a food chain, link chains into a food web, and explain trophic levels;
- describe mutualism, commensalism and parasitism, and how disturbing one part of an ecosystem affects the rest.