Responses of spectral indices to heat and drought differ by tree size in Douglas-fir

2024/12/31 by Olivia J.M. Waite, Nicholas C. Coops, Samuel Grubinger +4 · 2 voices
Environmental Science · Earth and Planetary Sciences · #Plant Water Relations and Carbon Dynamics #Forest ecology and management #Tree-ring climate responses

paper · doi:10.1016/j.srs.2024.100193

Abstract

• Remotely sensed spectral traits quantify responses to heat in coastal Douglas-fir. • Red edge indices and PRI are sensitive to heat responses. • Red edge indices, PRI and GCC are sensitive to tree size. • Chlorophyll:carotenoid indices show phenological decline across the drought. • Results demonstrate potential of multispectral phenotyping of heat response.

Citations

• Responses of tree species to heat waves and extreme heat events
• Estimating near‐infrared leaf reflectance from leaf structural characteristics

Discussions

• Waite et al. (2025) find that heat & drought affect Douglas‑fir red‑edge spectral indices differently by tree size—mature trees show steeper red‑edge declines mid‑drought than saplings. #UAV #Lidar #m [bsky, 8 points, 0 comments]
• NEW PAPER 📣 𝑅𝑒𝑠𝑝𝑜𝑛𝑠𝑒𝑠 𝑜𝑓 𝑠𝑝𝑒𝑐𝑡𝑟𝑎𝑙 𝑖𝑛𝑑𝑖𝑐𝑒𝑠 𝑡𝑜 ℎ𝑒𝑎𝑡 𝑎𝑛𝑑 𝑑𝑟𝑜𝑢𝑔ℎ𝑡 𝑑𝑖𝑓𝑓𝑒𝑟 𝑏𝑦 𝑡𝑟𝑒𝑒 𝑠𝑖𝑧𝑒 𝑖𝑛 𝐷𝑜𝑢𝑔𝑙𝑎𝑠-𝑓𝑖𝑟 #OpenAccess 🔓 doi.org/10.1016/j [bsky, 6 points, 1 comments]

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