"A niche is like the occupation of a species, whereas its habitat is like its address. The niche concept is central in ecology."
"A biome is like a city.
An ecosystem is like a community in a city. There are many ecosystems in a biome. A habitat is like a home. There are many homes in an ecosystem."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.