Shallow soils promote savannas in South America

http://ift.tt/eA8V8J The boundary between South American tropical rainforests and savannas is influenced by the depth to which plants can root, research indicates. Shallow rooting depth promotes the establishment of savannas. Previous research has shown that precipitation and fire mediate tropical forest and savanna distributions. The study shows that below ground conditions need to be considered to understand the distribution of terrestrial vegetation both historically and in the face of future climate change. The study is based on computer vegetation models.

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