Aquatic vegetation on the lakebed is often concentrated around the margins – to the depth that light penetrates. This is known as the littoral zone. Lake Taupō has relatively clear water, and aquatic vegetation can be seen growing at some depth as the lakebed falls away. In very clear lakes such as Lake Wakatipu, mosses can be found growing at depths of 60 metres. In turbid (muddy) lakes light cannot penetrate so far, and plants can only grow in shallower waters.
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