It should look nice and attractive, with eye-catching logo of the company posted on it and special offers in a dominant area which is colour-coded for easy recognition.

Many ancient relic species centrally distributed in the area, most of them were the constructive or dominant species of desert community, their existence played an import.

Not surprisingly, one study found that growth of sitka spruce, the dominant streamside tree in the area, was three times greater along salmon streams than along nonsalmon streams.