How does canopy height regulate autumn photosynthetic phenology in the Northern Hemisphere?
Artikel i vetenskaplig tidskrift, 2024

Autumn photosynthetic phenology strongly regulates the length of growing season and terrestrial carbon cycle, providing feedbacks to climate change. While the climatic drivers of autumn photosynthetic phenology have received considerable attention, the regulation by forest structural features is frequently overlooked. Here, we used spaceborne LiDAR observations of canopy height, two sets of canopy height products, and satellite solar-induced chlorophyll, to characterize the role of canopy height in autumn photosynthetic phenology from 2001 to 2020. We found strong dependencies of autumn photosynthetic phenology on canopy height in 65.2% of the northern forest. Taller trees tend to end the growing season later, likely due to the enhanced acquisition of solar radiation associated with increased canopy height. Additionally, taller trees have deeper root system to maintain strong hydraulic transport capacity and higher resistance to water stress. This study highlights the importance of forest structure in regulating vegetation phenology and contributes to enhancement of phenological models and carbon cycle simulations.

Författare

Rui Tang

Beijing Normal University

Bin He

Beijing Normal University

Miaogen Shen

Beijing Normal University

Ziqian Zhong

Chalmers, Rymd-, geo- och miljövetenskap, Geovetenskap och fjärranalys

Hongtao Xu

Beijing Normal University

Tiewei Li

Beijing Normal University

Lanlan Guo

Beijing Normal University

Ling Huang

Beijing University of Technology

Beijing Normal University

Xinzi Huang

Beijing No.4 High School

Innovation Geoscience

29598753 (eISSN)

Vol. 2 4 100095

Ämneskategorier (SSIF 2025)

Skogsvetenskap

Naturgeografi

Markvetenskap

DOI

10.59717/j.xinn-geo.2024.100095

Mer information

Senast uppdaterat

2025-02-07