I am broadly interested in the role of microbial communities in terrestrial carbon cycling, particularly the interactions between soil microbes and soil organic matter (SOM) composition and stability. My dissertation research takes an interdisciplinary approach to carbon biogeochemistry. I am measuring SOM quantity and chemical quality along ~1.5 meter-deep soil profiles in order to understand how soil carbon changes with depth and age. This work will involve physical and chemical fractionations as well as thermal analysis and 13C NMR to characterize SOM functionalities. In conjunction with this work I am using a suite of molecular techniques and biochemical assays to profile microbial community diversity, structure and functional characteristics spanning the same depth profiles. The sampling design for this study incorporates depth profiles on fully factorial combinations of the two dominant parent materials (granidiorite and volcaniclastic) and three dominant forest types (tabunuco,
Parent material and vegetation influence bacterial community structure and nitrogen functional genes along deep tropical soil profiles at the Luquillo Critical Zone Observatory. Stone M.M., DeForestb J.L., Plante A.F. (2015): Soil Biology & Biochemistry
Changes in extracellular enzyme activity and microbial community structure with soil depth at the Luquillo Critical Zone Observatory. Stone, M.M., DeForest, J.L., Plante, A.F. (2014): Soil Biology & Biochemistry
Changes in phosphatase kinetics with soil depth across a variable tropical landscape. Stone, M.M., Plante, A.F. (2014): Soil Biology & Biochemistry
Plant and nutrient controls on microbial functional characteristics in a tropical Oxisol. Stone M.M., Plante A.F., Casper, B.B. (2013): Plant and Soil
Papers and books that explicitly acknowledge a CZO grant are highlighted in PALE ORANGE.
SOIL MICROBIAL COMMUNITIES AND SOIL ORGANIC MATTER: COMPOSITION AND ECOLOGICAL FUNCTIONS IN THE LUQUILLO CRITICAL ZONE. Stone M.M., Plante A.F. (2014): University of Pennsylvania
Changes in extracellular enzyme activities and kinetics with depth across contrasting parent materials in the Luquillo Critical Zone. Stone M.M., Plante, A.F. (2013): Ecological Society of America Conference 2013.
Soil Organic Matter and Microbial Activity in Critical Zone of Tropical Soils from Luquillo, Puerto Rico. Stone, M.M., Plante, A.F. (2013): Goldschmidt2013 Conference Abstracts. Florence Italy.
29 Jan 2015 - Deep but not dead: how tropical subsoil microbes could affect the carbon cycle By Madeleine Stone, University of Pennsylvania It’s no exaggeration...
Soil microbial communities and soil organic matter: composition and ecological functions in the Luquillo Critical Zone
University of Pennsylvania - Hayden Hall Rm 353.