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 18 contrast DHJanzen100786.jpg high resolution
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| The valley of the Rio Potrero Grande, subject to centuries of logging (in the bottomlands) and burning (throughout) during the annual dry season. The low forest on the slopes (seen still in image DHJanzen100785.jpg above) has been almost entirely replaced by a native grass (Trachypogon plumosus, Poaceae) that once occurred in small patches on ridge tops, cliff faces and landslides among the low forest on these serpentine soils. Small forest remnants can be seen as dark gray patches in some of the ravines on the slopes, ravines that were too rocky (and perhaps somewhat moist) to carry a fire, thereby protecting the woody vegetation in them. | ||
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