Chapters - Past terrestrial response

5 important questions on Chapters - Past terrestrial response

What does this chapter explore?

Vegetation shifts that give insight into the scope of vegetation change in geologic time, and explores in more detail our understanding of response to emergence from the last ice age, as this evolving thinking is critical to understanding possible biotic response to large human-induced climate change.

What are megathermal forests?

These forests (warm evergreen broadleaf forests) are similar to tropical forests of today, but they were found in the subtropics and temperate latitudes in the past.

What made it impossible for very cold continental winters to become established in the Southern Hemisphere?

The small amount of land at high latitude. Therefor instead of kilometer-thick ice sheets, the south had extensive montane glaciers interspersed with large areas of non-ice habitats.
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Why can plants not go south endlessly in the Southern Hemisphere?

There could not be wavelike poleward advances because Africa, South America, and New Zealand all taper to southern tips. A plant trying to go poleward in these southern areas would run into ocean.

How could trees survive next to the ice?

Because a block of 1 km of ice blocks the arctic air, so the area next to the ice would actually be warm enough to support trees.

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