Forest canopy decline under elevated CO2 during the Paleocene-Eocene Thermal Maximum · R. E. Dunn et al.
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PaleOecOlOGY Forest canopy decline under elevated CO2 during the Paleocene- Eocene Thermal Maximum Regan E. Dunn1,2*, Marieke Dechesne3, Brady Z. Foreman4, Keifer Nace5, Jenna M. West3, Ellen D. Currano6 uncertainty remains regarding the impact of rapid anthropogenic warming on forest ecosystem structure, biodiversity, and function. As an analog, we reconstruct forest canopy density and compositional change in Wyoming, usA, through the Paleocene-Eocene thermal Maximum (PEtM), an interval of abrupt carbon increase and warming ∼56 million years ago. We develop a proxy to quantify leaf area index and assess shifts in floral composition using palynomorphs. Forest canopies opened abruptly at onset of PEtM warming, landscape erosion increased, and vegetation shifted from broad- leaved angiosperm to fern- and palm- dominated ecosystems. …
摘自《科学》(Science)第393卷 第6812期 · 2026年8月13日,R. E. Dunn et al.。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。