1a. Objectives (from AD-416)
Climate change, particularly temperature and carbon dioxide is altering weed demographics in managed and unmanaged plant systems. The objective of the current research is to determine the vegetative and reproductive response of short day annual weeds to these aspects of climate change.
1b. Approach (from AD-416)
Working with Rutgers University, we will grow a number of annual short-day weeds utilizing a projected range of carbon dioxide concentrations and temperatures, and quantify both growth rate and pollen production. Data will be utilized to characterize weed demographics in a changing climate.
3. Progress Report
Weed seed of three short day annual weeds, common ragweed, mugwort, and English plantain were obtained from Herbiseed Corporation. Germination trials were conducted on all seed lots. Delivery and installation of two new climate controlled growth chambers were accomplished. Initial trials of chambers were conducted, and initial problems in heating and cooling identified. Seed has been planted and the first trials are underway. The experiment will be conducted at current and near term climatic projections of carbon dioxide and temperature for the mid-Atlantic region using the Intergovernmental Panel on Climate Change (IPCC) "B" scenario. As a new project, preliminary meetings were held between the Forest Service, Rutgers University, and ARS in August of 2010 in Phoenix Arizona. Annual meetings are scheduled for the Fall of 2011 and 2012.