Canopy water content is the most sensitive physiological measure of giant sequoia susceptibility to drought.
Imaging spectroscopy maps low-density, variable phenology invader throughout a California mediterranean-type ecosystem
Across the state of California, millions of trees are dying each year—but it’s not from old age. The ongoing drought is causing extreme water stress in many forests, which paradoxically leads trees to release pheromones that attract another threat: bark beetles. According to forest ecologist Christina Restaino, water stress also cuts the trees’ ability to produce sap, a first-line defense against beetles.
Even before the plane left the runway, it was clear the crew of researchers examining the fallout from California’s historic drought would not return with good news.