What comes after fire? What forests need to survive in a warming world
Jennifer Bhatnagar spent the summer of 2023 traversing barren hillsides blackened by wildfire in northern California. She walked through devastated properties, examined the hot soil beneath her feet, collected samples and asked questions.
Following the devastation left by wildfire, Jennifer Bhatnagar and her team embarked on a mission to understand the intricate process of forest recovery in northern California. The research, funded by the Ecotechnology and Landscape Restoration Research Fund, was spearheaded by Bhatnagar, an associate professor of biology and director of Boston University's Biogeoscience Graduate Program.
The project aimed to explore how wildfire, urbanization, and ecological restoration shape forest recovery and enhance resilience in a world where severe wildfires are becoming more frequent.
As Bhatnagar walked through the scorched hillsides, she observed the barren landscape, questioning how forests could reclaim their former glory in such inhospitable conditions. Her background in studying microorganisms led her to focus on soil microbiomes - the complex communities of bacteria and fungi that play a crucial role in nutrient recycling, plant health, and forest responses to environmental change. These "hidden engineers" of the forest were the primary focus of her research.
During her fieldwork, Bhatnagar and her team asked questions that went beyond fungi, delving into the reasons behind varying recovery rates, the presence of non-native grasses, and the potential role of restoration strategies. The scientists collaborated closely with a diverse group of stakeholders, including fire officials, restoration practitioners, land managers, landscape architects, fellow researchers, students, and local residents.
By listening to the community's priorities and preferences, the team was able to design a more tailored approach to restoration.
One key takeaway from their research was the importance of considering urban development's impact on forest recovery. As roads, neighborhoods, and infrastructure encroach upon natural landscapes, forests become fragmented, hotter, drier, and more polluted - conditions that hinder regrowth. In response, Bhatnagar's team began exploring ways to foster both ecological and human resilience in post-fire landscapes, drawing inspiration from the Miyawaki method of dense, multi-species planting to create more resilient forest ecosystems.
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