Bedrock tapping map (IMAGE)
Caption
The spatial extent of annual bedrock water withdrawal by woody plants in the continental United States. Colored areas encompass the extent of woody vegetation where bedrock is encountered within the upper 1.5 meters. This area is divided into four colors corresponding to bedrock water withdrawal. Areas in green were tapped each year of the study; Areas in pink were tapped some years; Areas in black do not need to have been tapped to explain tree water usage; and areas in gray were excluded from the study.
Credit
McCormick et al.
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License
Original content