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Glaciers act as reservoirs of water that persist through summer. Continual melt from glaciers contributes water to the ecosystem throughout dry months, creating perennial stream habitat and a water source for plants and animals. The cold runoff from glaciers also affects downstream water temperatures. Many aquatic species in mountainous environments require cold water temperatures to survive. Some aquatic insects--fundamental components of the food web--are especially sensitive to stream temperature and cannot survive without the cooling effects of glacial melt water. Such changes in stream habitat may also adversely impact native trout and other keystone salmon species.
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Answer:
Each cell expresses, or turns on, only a fraction of its genes. The rest of the genes are repressed, or turned off. The process of turning genes on and off is known as gene regulation. ... Gene regulation also allows cells to react quickly to changes in their environments.
I would choose to live on an island, possibly near the tropics. My choice is based on the fact that an island, like for example the archipelago of the Canarias Islands, could offer at the same time different weathers, depending if you going on the beach, or you choose to go up in the mountain. At the base, my decision is based on the fact that the climate is very stable, almost warm forever, and near the sea, it is never too much cold.
