Led by the Missouri Botanical Garden (Dr. Jalene LaMontagne) in collaboration with UConn (Dr. Beth Lawrence), we received a $1.7 million NSF grant to study boreal tree reproduction.
NFS DEB: Collaborative Research: IUSC: Using the past, present, and future to investigate the effects of global change agents on tree reproduction across the boreal forest
Seed production by trees plays an essential role in the ecological and economic stability of future forests because seeds directly contribute to the growth of new trees. This is especially critical in boreal forests, which cover about 30% of the Earth’s area. Previous studies of the effects of environmental variability on boreal tree species have focused on tree growth and species’ range shifts, however a key gap in knowledge is understanding how tree reproduction is affected by abiotic conditions, such as temperature or precipitation. Advancing our understanding of the North American boreal forest is challenging because it is very large, the environmental conditions vary by region, and boreal tree species differ in their habitats and traits. Also, current forest models either ignore tree reproduction entirely or simplify it to assume that seed availability is constant. This project will test how abiotic factors (CO2 levels, temperature, water availability, nitrogen deposition, wildfire) interact to affect seed quantity and quality (seed mass, seed chemistry, seed germination rates). This information will be used in models to predict the future of boreal forests. This research will inform federal and state agencies about drivers of seed production and viability, increase public scientific literacy about tree dynamics and boreal forests, and add cone specimens from North American boreal forests to the Missouri Botanical Garden herbarium for future use. The project will train three graduate students and six undergraduates in conducting scientific research, as well as support a youth training program.