An ecosystem includes all of the biotic and abiotic factors that are found in a given environment

An ecosystem includes all of the biotic and abiotic factors that are found in a given environment. A biome is a collection of different ecosytems which share similar climate conditions.

An example of an ecosystem is a pond. All of the living things in the pond (frogs, fish, , water plants etc.) are considered biotic factors . The abiotic factors of the pond ecosytem would include all of the non-living factors (water, light, dissolved oxygen, nitrates etc.) which are found in the pond.

A biome is a collection of different ecosystem that share similar climate conditions. Northeastern Minnesota is coniferous forest biome. In this region of the state of Minnesota you will find pond ecosystems, forest, rivers & streams etc.

The biosphere includes all the places on earth where life is found and includes ALL of the different biomes.

This video discusses levels of organization in ecology, including discussion of ecosystems and biomes.