Diverse Microbial Carbon Turnover and Dynamics in Temperate and Tropical Forest Soils

摘要

Microbial metabolism is widely accepted as the driving force in humification processes;however,turnover models wholly overlook the importance of microbial biochemistry despite the fact that most plant residues likely pass through microbial biomass prior to conversion to humic substances(Kogel-Knabner,2002).This research investigates the importance of microbial biochemistry to humification pathways in two climatically different forest ecosystems;Blodgett forest(BF),a temperate forest in the Sierra Nevada and Luquillo forest(LF),a tropical forest in Puerto Rico.These sites represent diverse ecosystems that are known to support substantially different microbial communities,and provide an excellent opportunity to look at the effects of climate,parent material,and microbial community on humification.