Samantha Weintraub receives NSF-DDIG award

sam october soil pitCongrats to Sam, who has been awarded an NSF Doctoral Dissertation Improvement Grant entitled “The effects of soil residence time on nitrogen cycling in lowland tropical forests.”  The grant extends a new collaboration between our lab and geomorphologist Bob Anderson, and will allow Sam to collect some novel Be-10  data, as well as a number of related soil measurements, that as a whole can constrain variation in soil residence time across a dissected landscape in Costa Rica.  Why soil residence time?  Sam has shown intriguing connections between topography and nitrogen availability and loss across a lowland tropical forest region in Costa Rica, and hypothesizes that erosion-driven differences in soil residence time are helping to create a mosaic of N availability, one that in turn may have important implications for overall patterns in nutrient limitation.   Yet another example of the fascinating heterogeneity of tropical forests.

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