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题材-考古-环境变化类
结构-各类证据显示高地之前是森林。但还有其它争论,并指出其它争论的问题。
- The idea is that the Highlands in Madagascar were once forested
- Evidence supporting the idea:
- All living marinalian species are forest dwelling, including lemurs
- Subfossils of extinct forest animals found at treeless highland sites
- Pollen spectra suggest forest vegetation from around AD. 1000
- Some researchers have interpreted the vegetation differently:
- A changing climate
- A response to seasonal lack of rainfall
- However, the explanation of seasonal desiccation ignores:
- The role of lichens and mosses in maintaining water balance
- The contribution of fog drip and dew condensation to the water balance
- The ability of the closed forest to maintain itself in a wet-dry climatic regime
marinalian - 海洋的 arboreal - 栖息树木的 desiccation - 干燥 Lichens - 苔藓
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