Seasonal and intra-canopy fates of absorbed photons across microclimatic gradients in Central Amazonian forests

We assessed seasonal and intra-canopy variations in leaf energy
partitioning in central Amazonian forests with extensive in-canopy
sampling and pulse amplitude modulated (PAM) chlorophyll fluorescence
measurements. In order to cover seasonal variation of leaf
microenvironments and energy partitioning, we compared measurements
between dry (Jul.-Dec.) and wet (Jan.-Mar.) seasons in the TNF K67 site.
The dataset includes the pathways of photon utilization for photochemistry
(ΦPSII), heat dissipation (ΦNPQ), and fluorescence re-emission (ΦNO). Dry
season field campaigns were conducted in 2019, 2021, and 2022, and a wet
season campaign was conducted in 2023. We conducted pulse amplitude
modulated (PAM) chlorophyll-a fluorescence measurements and sampling of
microenvironmental variation at the leaf level with the MultispeQ (V2.0).