Abstract：
:Although canopy height has long been a focus of interest in ecology, it has remained difficult to study at large spatial scales. Recently, satellite-borne LiDAR equipment produced the first systematic high resolution maps of vegetation height worldwide. Here we show that this new resource reveals three marked modes in tropical canopy height ~40, ~12, and ~2 m corresponding to forest, savanna, and treeless landscapes. The distribution of these modes is consistent with the often hypothesized forest-savanna bistability and suggests that both states can be stable in areas with a mean annual precipitation between ~1,500 and ~2,000 mm. Although the canopy height states correspond largely to the much discussed tree cover states, there are differences, too. For instance, there are places with savanna-like sparse tree cover that have a forest-like high canopy, suggesting that rather than true savanna, those are thinned relicts of forest. This illustrates how complementary sets of remotely sensed indicators may provide increasingly sophisticated ways to study ecological phenomena at a global scale.
journal_name
Ecologyjournal_title
Ecologyauthors
Xu C,Hantson S,Holmgren M,van Nes EH,Staal A,Scheffer Mdoi
10.1002/ecy.1470subject
Has Abstractpub_date
2016-09-01 00:00:00pages
2518-2521issue
9eissn
0012-9658issn
1939-9170journal_volume
97pub_type
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