Soil Enzyme Activity and Soil Nutrients Jointly Influence Post-Fire Habitat Models in Mixed-Conifer Forests of Yosemite National Park, USA

In mixed-conifer forests of Yosemite National Park, soil enzyme activity and nutrient levels play a significant role in shaping species composition post-fire, often more so than topographic factors. A study analyzing 160 locations in the recently burned Yosemite Forest Dynamics Plot (YFDP) found that soil properties—including phosphatases and urease enzymes—defined habitat niches for 54.5% of species associations, compared to 45.4% defined by topography. Enzyme activity was particularly influential in explaining species abundance and basal area increment. While spatial factors explained more variation in stem abundance, mortality, and recruitment, the study underscores the need for a nuanced understanding of niche parameters beyond simple topographic data to fully grasp species habitat preferences.

Tamjidi, J., & Lutz, J. A. (2020). Soil Enzyme Activity and Soil Nutrients Jointly Influence Post-Fire Habitat Models in Mixed-Conifer Forests of Yosemite National Park, USA. Fire, 3(4), 54. https://doi.org/10.3390/fire3040054