Forest fragmentation impacts the seasonality of Amazonian evergreen canopies
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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Yn: Nature Communications, Cyfrol 13, Rhif 1, 917, 17.02.2022.
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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T1 - Forest fragmentation impacts the seasonality of Amazonian evergreen canopies
AU - Nunes, Matheus Henrique
AU - Camargo, José Luis C.
AU - Vincent, Gregoire
AU - Calders, Kim
AU - Oliveira, Rafael S.
AU - Huete, Alfredo
AU - de Moura, Yhasmin Mendes
AU - Nelson, Bruce
AU - Smith, Marielle
AU - Stark, Scott C.
AU - Maeda, Eduardo Eiji
PY - 2022/2/17
Y1 - 2022/2/17
N2 - Predictions of the magnitude and timing of leaf phenology in Amazonian forests remain highly controversial. Here, we use terrestrial LiDAR surveys every two weeks spanning wet and dry seasons in Central Amazonia to show that plant phenology varies strongly across vertical strata in old-growth forests, but is sensitive to disturbances arising from forest fragmentation. In combination with continuous microclimate measurements, we find that when maximum daily temperatures reached 35 °C in the latter part of the dry season, the upper canopy of large trees in undisturbed forests lost plant material. In contrast, the understory greened up with increased light availability driven by the upper canopy loss, alongside increases in solar radiation, even during periods of drier soil and atmospheric conditions. However, persistently high temperatures in forest edges exacerbated the upper canopy losses of large trees throughout the dry season, whereas the understory in these light-rich environments was less dependent on the altered upper canopy structure. Our findings reveal a strong influence of edge effects on phenological controls in wet forests of Central Amazonia.
AB - Predictions of the magnitude and timing of leaf phenology in Amazonian forests remain highly controversial. Here, we use terrestrial LiDAR surveys every two weeks spanning wet and dry seasons in Central Amazonia to show that plant phenology varies strongly across vertical strata in old-growth forests, but is sensitive to disturbances arising from forest fragmentation. In combination with continuous microclimate measurements, we find that when maximum daily temperatures reached 35 °C in the latter part of the dry season, the upper canopy of large trees in undisturbed forests lost plant material. In contrast, the understory greened up with increased light availability driven by the upper canopy loss, alongside increases in solar radiation, even during periods of drier soil and atmospheric conditions. However, persistently high temperatures in forest edges exacerbated the upper canopy losses of large trees throughout the dry season, whereas the understory in these light-rich environments was less dependent on the altered upper canopy structure. Our findings reveal a strong influence of edge effects on phenological controls in wet forests of Central Amazonia.
KW - Ecological modelling
KW - Ecosystem ecology
KW - Phenology
KW - Tropical ecology
U2 - 10.1038/s41467-022-28490-7
DO - 10.1038/s41467-022-28490-7
M3 - Article
C2 - 35177619
VL - 13
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 917
ER -