Forest fragmentation impacts the seasonality of Amazonian evergreen canopies

Nunes, M. H.; Camargo, J. L. C.; /Vincent, Grégoire; Calders, K.; Oliveira, R. S.; Huete, A.; de Moura, Y. M.; Nelson, B.; Smith, M. N.; Stark, S. C.; Maeda, E. E.

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dc.creator	Nunes, M. H.
dc.creator	Camargo, J. L. C.
dc.creator	/Vincent, Grégoire
dc.creator	Calders, K.
dc.creator	Oliveira, R. S.
dc.creator	Huete, A.
dc.creator	de Moura, Y. M.
dc.creator	Nelson, B.
dc.creator	Smith, M. N.
dc.creator	Stark, S. C.
dc.creator	Maeda, E. E.
dc.date	2022
dc.date.accessioned	2022-04-27T17:37:55Z
dc.date.available	2022-04-27T17:37:55Z
dc.identifier	https://www.documentation.ird.fr/hor/fdi:010084359
dc.identifier	oai:ird.fr:fdi:010084359
dc.identifier	Nunes M. H., Camargo J. L. C., Vincent Grégoire, Calders K., Oliveira R. S., Huete A., de Moura Y. M., Nelson B., Smith M. N., Stark S. C., Maeda E. E.. Forest fragmentation impacts the seasonality of Amazonian evergreen canopies. 2022, 13 (1), p. 917 [10 p.]
dc.identifier.uri	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/169164
dc.description	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 degrees 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. Even evergreen tropical forests can have seasonal dynamics, which may be sensitive to disturbance. Here, the authors combine high-resolution remote sensing observations and microclimate data to show that forest fragmentation impacts canopy phenology dynamics in the Amazon forest.
dc.language	EN
dc.title	Forest fragmentation impacts the seasonality of Amazonian evergreen canopies
dc.type	text
dc.coverage	BRESIL
dc.coverage	AMAZONIE