Evaluating the effects of biomass production in managed pine forests on water quality and quantity, soil productivity, and wildlife

Background/Question/Methods and Results/Conclusions

Utilizing forest biomass for biofuel production has emerged as a promising alternative to fossil fuels. However, very little research has focused on how to simultaneously grow biomass for biofuel production while still managing for high quality wood products in an intensive silvicultural system.  Furthermore, the potential effect that such a dual system could have on long-term soil productivity, water quality and quantity, and wildlife is critical for the viability of such an intensive management system.  As a result of this gap in scientific knowledge, a set of comprehensive studies have been initiated by Catchlight Energy LLC (a joint venture between of Chevron and Weyerhaeuser) on Weyerhaeuser Company timberlands across the southeastern United States.  The objective is to examine multiple environmental responses to biomass treatments, specifically intercropping of switchgrass within planted pine stands and removal of forest residuals and non-crop tree biomass. The study includes multiple study areas in 3 states (AL, MS, and NC) with study designs ranging from traditional plot-based experimental treatments to watershed scale treatments.  To date, parameters to be examined include soil measures (physical and chemical properties, nutrient availability, and carbon storage and cycling), water quality and quantity, wildlife habitat response, and sampling of wildlife communities (birds, small mammals, herpetiles, and invertebrates). Additionally, a tool has been created for carbon life cycle analyses. Scientists from over 10 companies, universities, and government agencies are collaborating and results from these studies will provide direction for developing guidelines and management practices for biomass production. This presentation will outline the study approach and discuss preliminary results from this ongoing, long-term research effort.