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...migrate towards the pole) which thrive in open water. [Figure 28] Figure 28 A 'drunken' forest on ground softened by melting permafrost, outside Fairbanks, Alaska...Climate change: 2.5.1 Physical and weather-related indicators - The indicators collected in Table 4 have been observed to change over large regions of the Earth during the 20th century. According to the TAR,...

...migrate to their summer feeding grounds. In 'The Opportunists' you saw the highly omnivorous grizzly bear feeding on roots, grass, the carcass of a whale, deer, salmon, clams and berries - a much more wide-ranging diet than implied by Figure 3. What this example illustrates is that no single, simple food web can do justice to the complexities of an ecosystem. Even with a...

...migrates to woodland for the summer. At the opposite end of the spectrum are the true woodland specialist species. These species rely on trees and woods throughout their life cycle: birds such as the nuthatch (Sitta europaea) and all three species of woodpecker; mammals such as the red squirrel (Sciurus vulgaris); and specialist lichens and mosses such as the striated...