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Amazon forest biogeography predicts resilience and vulnerability to drought

https://doi.org/10.1038/s41586-024-07568-w

Chen, Shuli ; Stark, Scott C ; Nobre, Antonio Donato ; Cuartas, Luz Adriana ; de_Jesus_Amore, Diogo ; Restrepo-Coupe, Natalia ; Smith, Marielle N ; Chitra-Tarak, Rutuja ; Ko, Hongseok ; Nelson, Bruce W ; et al ( July 2024 , Nature)

Free, publicly-accessible full text available July 4, 2025
Global photosynthetic capacity jointly determined by enzyme kinetics and eco-evo-environmental drivers

https://doi.org/10.1016/j.fmre.2023.12.011

Yan, Zhengbing ; Detto, Matteo ; Guo, Zhengfei ; Smith, Nicholas G ; Wang, Han ; Albert, Loren P ; Xu, Xiangtao ; Lin, Ziyu ; Liu, Shuwen ; Zhao, Yingyi ; et al ( February 2024 , Fundamental Research)

Free, publicly-accessible full text available February 1, 2025
Multiscale mapping of plant functional groups and plant traits in the High Arctic using field spectroscopy, UAV imagery and Sentinel-2A data

https://doi.org/10.1088/1748-9326/abf464

Thomson, Eleanor R ; Spiegel, Marcus P ; Althuizen, Inge H ; Bass, Polly ; Chen, Shuli ; Chmurzynski, Adam ; Halbritter, Aud H ; Henn, Jonathan J ; Jónsdóttir, Ingibjörg S ; Klanderud, Kari ; et al ( April 2021 , Environmental Research Letters)
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Seasonal and drought‐related changes in leaf area profiles depend on height and light environment in an Amazon forest

https://doi.org/10.1111/nph.15726

Smith, Marielle N. ; Stark, Scott C. ; Taylor, Tyeen C. ; Ferreira, Mauricio L. ; de Oliveira, Eronaldo ; Restrepo‐Coupe, Natalia ; Chen, Shuli ; Woodcock, Tara ; dos Santos, Darlisson Bentes ; Alves, Luciana F. ; et al ( March 2019 , New Phytologist)

Summary
Seasonal dynamics in the vertical distribution of leaf area index (LAI) may impact the seasonality of forest productivity in Amazonian forests. However, until recently, fine‐scale observations critical to revealing ecological mechanisms underlying these changes have been lacking.
To investigate fine‐scale variation in leaf area with seasonality and drought we conducted monthly ground‐based LiDAR surveys over 4 yr at an Amazon forest site. We analysed temporal changes in vertically structuredLAIalong axes of both canopy height and light environments.
Upper canopyLAIincreased during the dry season, whereas lower canopyLAIdecreased. The low canopy decrease was driven by highly illuminated leaves of smaller trees in gaps. By contrast, understoryLAIincreased concurrently with the upper canopy. Hence, tree phenological strategies were stratified by height and light environments. Trends were amplified during a 2015–2016 severe El Niño drought.
Leaf area low in the canopy exhibited behaviour consistent with water limitation. Leaf loss from short trees in high light during drought may be associated with strategies to tolerate limited access to deep soil water and stressful leaf environments. Vertically and environmentally structured phenological processes suggest a critical role of canopy structural heterogeneity in seasonal changes in Amazon ecosystem function.

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