Using phenological cameras to track the green up in a cerrado savanna and its on-the-ground validation

Alberton, Bruna; Almeida, Jurandy; Helm, R. M.; Torres, Ricardo da S.; Menzel, Annette; Morellato, Leonor Patrícia Cerdeira

doi:10.1016/j.ecoinf.2013.12.011

Cited by 65 publications

(119 citation statements)

References 47 publications

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“…For cerrado species, leaf flushing generally occurs at the transition from the dry to the wet season (Rossatto et al 2009, Alberton et al 2014). However, non-accumulating plants flushed at the end of the dry season (September), while Al-accumulating plants flushed throughout the year, but more intensely at the end of both the dry (September) and the wet (April/May) season.…”

Section: Discussionmentioning

confidence: 99%

“…These evaluations were performed on 36 transects, measuring 25 x 2 m and 50 m distant from each other, that were established on the southern and eastern faces of the experimental fragment , Alberton et al 2014. The presence or absence of leaf flushing was registered according to Morellato et al (2000Morellato et al ( , 2010.…”

Section: Phenological Observationsmentioning

confidence: 99%

“…Some cerrado woody plants flush at the end of the dry season (September), most probably because flushing just before the beginning of the wet season (October) avoids exposure of tender tissues during the peak of the wet season (January) (Rossatto et al 2009, Alberton et al 2014, when some herbivores, such as coleoptera (Marquis et al 2002, Pinheiro et al 2002, hemiptera, and isoptera (Pinheiro et al 2002) cause significant leaf damage. Thus, the exposure of mature rather than young leaves in the wet season could avoid injuries (Mantovani and Martins 1988).…”

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confidence: 99%

“…Therefore, as in most tropical vegetation, leaves flush and develop during the spring-summer (Rossatto et al 2009, Kushwaha et al 2011, Alberton et al 2014, as water availability and the warm weather enhance the photosynthetic rates and growth of new branches. However, we have found no comparative studies about leaf flushing in these two functional groups from the cerrado.…”

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confidence: 99%

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Ecological strategies of Al-accumulating and non-accumulating functional groups from the cerrado sensu stricto

Souza

Bueno

Morellato

et al. 2015

An. Acad. Bras. Ciênc.

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The cerrado's flora comprises aluminum-(Al) accumulating and non-accumulating plants, which coexist on acidic and Al-rich soils with low fertility. Despite their existence, the ecological importance or biological strategies of these functional groups have been little explored. We evaluated the leaf flushing patterns of both groups throughout a year; leaf concentrations of N, P, K, Ca, Mg, S, Al, total flavonoids and polyphenols; as well as the specific leaf area (SLA) on young and mature leaves within and between the groups. In Al-accumulating plants, leaf flushed throughout the year, mainly in May and September; for non-accumulating plants, leaf flushing peaked at the dry-wet seasons transition. However, these behaviors could not be associated with strategies for building up concentrations of defense compounds in leaves of any functional groups. Al-accumulating plants showed low leaf nutrient concentrations, while non-accumulating plants accumulated more macronutrients and produced leaves with high SLA since the juvenile leaf phase. This demonstrates that the increase in SLA is slower in Al-accumulating plants that are likely to achieve SLA values comparable to the rest of the plant community only in the wet season, when sunlight capture is important for the growth of new branches.

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Section: Discussionmentioning

confidence: 99%

Section: Phenological Observationsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Ecological strategies of Al-accumulating and non-accumulating functional groups from the cerrado sensu stricto

Souza

Bueno

Morellato

et al. 2015

An. Acad. Bras. Ciênc.

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“…Na área 2, as parcelas experimentais foram instaladas sob Cerrado sensu stricto, que possui árvores de 2 a 8 metros de altura, podendo chegar a 12 metros em alguns casos (Alberton et al, 2014). A vegetação do Cerrado possui tolerância a incêndios e as condições de clima e solo favorecem a alta diversidade da sua flora (Brannstrom et al, 2008).…”

Section: Instalação Experimentalunclassified

Alterações no ciclo hidrológico e na perda de solo devido aos diferentes usos do solo e variações climáticas em área de Cerrado

Anache¹

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Testing Hopkins’ Bioclimatic Law with PhenoCam data

Richardson

Hufkens

et al. 2019

Appl Plant Sci

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Premise of the Study We investigated the spatial and temporal patterns of vegetation phenology with phenometrics derived from PhenoCam imagery. Specifically, we evaluated the Bioclimatic Law proposed by Hopkins, which relates phenological transitions to latitude, longitude, and elevation. Methods “Green‐up” and “green‐down” dates—representing the start and end of the annual cycles of vegetation activity—were estimated from measures of canopy greenness calculated from digital repeat photography. We used data from 65 deciduous broadleaf ( DB ) forest sites, 18 evergreen needleleaf ( EN ) forest sites, and 21 grassland ( GR ) sites. Results DB green‐up dates were well correlated with mean annual temperature and varied along spatial gradients consistent with the Bioclimatic Law. Interannual variation in DB phenology was most strongly associated with temperature anomalies during a relatively narrow window of time. EN phenology was not well correlated with either climatic factors or spatial gradients, but similar to DB phenology, interannual variation was most closely associated with temperature anomalies. For GR sites, mean annual precipitation explained most of the spatial variation in the duration of vegetation activity, whereas both temperature and precipitation anomalies explained interannual variation in phenology. Discussion PhenoCam data provide an objective and consistent means by which spatial and temporal patterns in vegetation phenology can be investigated.

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Using phenological cameras to track the green up in a cerrado savanna and its on-the-ground validation

Cited by 65 publications

References 47 publications

Ecological strategies of Al-accumulating and non-accumulating functional groups from the cerrado sensu stricto

Ecological strategies of Al-accumulating and non-accumulating functional groups from the cerrado sensu stricto

Alterações no ciclo hidrológico e na perda de solo devido aos diferentes usos do solo e variações climáticas em área de Cerrado

Testing Hopkins’ Bioclimatic Law with PhenoCam data

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