SUMMARY
We have discussed individual biomes worldwide and what distinguishes them from one another. But it's also important to note that biomes sometimes intergrade with each other at their boundaries. This kind of transition zone is called an ecotone. A good place to see an ecotone is at the border between tundra and taiga where tundra vegetation grows in between small, scattered clumps of conifer trees.

Biomes also may change over time as gradual climate shifts influence the kinds of plants and animals that are able to survive in an environment. For this reason, long-term global warming may have major effects on the boundaries of biomes and where they occur, if temperatures regionally or worldwide continue to rise.

Activity
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