Environmental drivers on leaf phenology of ironstone outcrops species under seasonal climate

Garcia, L. C.; Barros, Fernanda V.; Lemos-Filho, José Pires de

doi:10.1590/0001-3765201720150049

Cited by 8 publications

(4 citation statements)

References 48 publications

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“…Increasing day-length (longer days) triggers leaf flushing of most cerrado species in the communities studied, starting early in the dry season. Photoperiod has been reported to trigger leaf flushing in seasonal dry tropical vegetation [8,19,[75][76][77], but studies in the Brazilian caatinga are still lacking [78].…”

Section: Communities Leafing Patternsmentioning

confidence: 99%

Leafing Patterns and Drivers across Seasonally Dry Tropical Communities

et al. 2019

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Investigating the timing of key phenological events across environments with variable seasonality is crucial to understand the drivers of ecosystem dynamics. Leaf production in the tropics is mainly constrained by water and light availability. Identifying the factors regulating leaf phenology patterns allows efficiently forecasting of climate change impacts. We conducted a novel phenological monitoring study across four Neotropical vegetation sites using leaf phenology time series obtained from digital repeated photographs (phenocameras). Seasonality differed among sites, from very seasonally dry climate in the caatinga dry scrubland with an eight-month long dry season to the less restrictive Cerrado vegetation with a six-month dry season. To unravel the main drivers of leaf phenology and understand how they influence seasonal dynamics (represented by the green color channel (Gcc) vegetation index), we applied Generalized Additive Mixed Models (GAMMs) to estimate the growing seasons, using water deficit and day length as covariates. Our results indicated that plant-water relationships are more important in the caatinga, while light (measured as day-length) was more relevant in explaining leafing patterns in Cerrado communities. Leafing behaviors and predictor-response relationships (distinct smooth functions) were more variable at the less seasonal Cerrado sites, suggesting that different life-forms (grasses, herbs, shrubs, and trees) are capable of overcoming drought through specific phenological strategies and associated functional traits, such as deep root systems in trees.

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Section: Communities Leafing Patternsmentioning

confidence: 99%

Leafing Patterns and Drivers across Seasonally Dry Tropical Communities

et al. 2019

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“…However soils, as recognized for ancient systems, play a key role on species phenology and also distribution and diversification in campo rupestre (Le Stradic et al, 2018b). There is still a lack of understanding of leaf exchange dynamics in the campo rupestre (but see Garcia et al, 2017), and the resilience and recovery response of different habitats and vegetation types from fire events also remain poorly documented and understood. Large-scale climatic and leafing patterns at the Espinhaç o Range indicate differences among forests, grasslands and savannas that need to be further explored (Streher et al, 2017b).…”

Section: New Paths For An Ancient Ecosystemmentioning

confidence: 99%

Plant life in campo rupestre : New lessons from an ancient biodiversity hotspot

Morellato

Silveira²

2018

Flora

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“…Leaf life span is a property of individual leaves (Kikuzawa, 1991). Despite low variation between short and long daylengths in the tropics, leaf fall in diverse species of this region is signalled by photoperiod (Garcia et al, 2017), and its rate in those species is related to water availability (Borchert, 1998).…”

Section: Introductionmentioning

confidence: 99%