Population structure and fruit availability of the babassu palm ( Attalea speciosa Mart. ex Spreng) in human-dominated landscapes of the Northeast Region of Brazil

Campos, Juliana Loureiro Almeida; Albuquerque, Ulysses Paulino; Peroni, Nivaldo; Araújo, Elcida de Lima

doi:10.1590/0102-33062016abb0255

Cited by 13 publications

(17 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to the characteristic crown shape, they also show distinctive ecological behaviour, such as Attalea speciosa, which has a prominent star-shaped crown and is common and distributed in all the Amazon forest. It is a pioneer species known for the invasion of pastures and can even be the cause of abandonment of the land [24,25]. Some palm species are also indicators of past occupation in the Amazon forest, as it has been demonstrated for the anthropogenic soils called 'terra preta' in the Amazon [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Regional Mapping and Spatial Distribution Analysis of Canopy Palms in an Amazon Forest Using Deep Learning and VHR Images

Wagner¹,

Dalagnol

Casapia

et al. 2020

Remote Sensing

View full text Add to dashboard Cite

Mapping plant species at the regional scale to provide information for ecologists and forest managers is a challenge for the remote sensing community. Here, we use a deep learning algorithm called U-net and very high-resolution multispectral images (0.5 m) from GeoEye satellite to identify, segment and map canopy palms over ∼3000 km 2 of Amazonian forest. The map was used to analyse the spatial distribution of canopy palm trees and its relation to human disturbance and edaphic conditions. The overall accuracy of the map was 95.5% and the F1-score was 0.7. Canopy palm trees covered 6.4% of the forest canopy and were distributed in more than two million patches that can represent one or more individuals. The density of canopy palms is affected by human disturbance. The post-disturbance density in secondary forests seems to be related to the type of disturbance, being higher in abandoned pasture areas and lower in forests that have been cut once and abandoned. Additionally, analysis of palm trees’ distribution shows that their abundance is controlled naturally by local soil water content, avoiding both flooded and waterlogged areas near rivers and dry areas on the top of the hills. They show two preferential habitats, in the low elevation above the large rivers, and in the slope directly below the hill tops. Overall, their distribution over the region indicates a relatively pristine landscape, albeit within a forest that is critically endangered because of its location between two deforestation fronts and because of illegal cutting. New tree species distribution data, such as the map of all adult canopy palms produced in this work, are urgently needed to support Amazon species inventory and to understand their distribution and diversity.

show abstract

Section: Introductionmentioning

confidence: 99%

Regional Mapping and Spatial Distribution Analysis of Canopy Palms in an Amazon Forest Using Deep Learning and VHR Images

Wagner¹,

Dalagnol

Casapia

et al. 2020

Remote Sensing

View full text Add to dashboard Cite

show abstract

“…The eight-fold increment in S. coronata population density we documented is much higher than those reported for other palm species in disturbed habitats (e.g. Campos et al 2017, Martínez-Ramos et al 2016. Increments in arboreal palm density across disturbed forest habitats are commonly associated with an increase in light incidence (Souza & Martins 2003) and changes in the rates of seed predation and dispersal (Pimentel & Tabarelli 2004, Wright et al 2000.…”

Section: Discussionmentioning

confidence: 45%

“…In fact, S. coronata appears to be a stress-tolerant and aggressive colonizer, as are other lightdemanding palm species, e.g. Attalea humilis, A. oleifera, A. speciosa (Aguiar & Tabarelli 2010, Campos et al 2017, Henderson et al 1995, Lorenzi et al 2004, May et al 1985. Moreover, farmers frequently leave some palms when clearing forest for pasture or crops as they are useful.…”

Section: Discussionmentioning

confidence: 99%

“…Several arborescent palm species, such as Astrocaryum acaule, A. mexicanum, Attalea humilis, A. oleifera, A. speciosa, Bactris maraja and Lepidocaryum tenue, are known to increase their densities in disturbed habitats (Aguiar & Tabarelli 2010, Campos et al 2017, Martínez-Ramos et al 2016, May et al 1985, Pimentel & Tabarelli 2004, Scariot 1999, Souza & Martins 2003. Following human-driven disturbances, the increased recruitment rates in response to increased light availability (Souza & Martins 2003) and changes in dispersal-predation dynamics caused by poaching are two of the mechanisms that lead these palm species to proliferate (Pimentel & Tabarelli 2004, Wright et al 2000.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The palmSyagrus coronataproliferates and structures vascular epiphyte assemblages in a human-modified landscape of the Caatinga dry forest

Gonçalves¹,

Santo-Silva

Barros

et al. 2020

J. Trop. Ecol.

View full text Add to dashboard Cite

The proliferation of disturbance-adapted species in human-modified landscapes may change the structure of plant communities, but the response of biodiversity to human disturbances remains poorly understood. We examine the proliferation of the palm, Syagrus coronata, in disturbed forest stands and its impacts on the structure of vascular epiphyte assemblages in a human-modified landscape of Brazilian Caatinga dry forest. First, we compared S. coronata density between old-growth and regenerating forest stands. We then surveyed vascular epiphytes on 680 phorophytes (S. coronata and non-palm/control species) across five habitat types with different disturbance levels. There was an eight-fold increase in S. coronata density in regenerating areas compared with in old-growth forest. Syagrus coronota supported richer epiphyte assemblages at local (i.e. per palm) and landscape (i.e. pooling all palms) scale than control phorophytes, supporting more than 11 times the number of species of control phorophytes at both scales. Epiphyte assemblages were more abundant, species-rich and dominated by abiotically dispersed species in forest sites with intermediate disturbance levels (regenerating forest stands). More than simply operating as an exclusive phorophyte for more than 90% of the epiphyte species we recorded here, S. coronata favours epiphyte persistence and structures their assemblages across human-modified landscapes of the Caatinga forest.

show abstract

“…While a portion of the population wants to eliminate it, another part wants to maintain it because of its multiple uses, Araújo and Lopes (2012). Some plot-scale work has demonstrated higher densities of adult babassu in pastures than in the original forest, Anderson (1983); Campos et al (2017), while other work has shown the opposite, Barot et al (2005). A territory-wide study of the PA-Benfica smallholder farming community revealed this variability in the density of babassu cauliflower palms in primary forests as well as in pastures and secondary forests.…”

Section: Introductionmentioning

confidence: 99%

A stage-structured hierarchical Bayes model for the babassu palm tree population dynamics – Estimated from anthropogenic open area data sets

Sirakov

Fontez

Libourel³

et al. 2019

Ecological Modelling

View full text Add to dashboard Cite

Population structure and fruit availability of the babassu palm ( Attalea speciosa Mart. ex Spreng) in human-dominated landscapes of the Northeast Region of Brazil

Cited by 13 publications

References 31 publications

Regional Mapping and Spatial Distribution Analysis of Canopy Palms in an Amazon Forest Using Deep Learning and VHR Images

Regional Mapping and Spatial Distribution Analysis of Canopy Palms in an Amazon Forest Using Deep Learning and VHR Images

The palmSyagrus coronataproliferates and structures vascular epiphyte assemblages in a human-modified landscape of the Caatinga dry forest

A stage-structured hierarchical Bayes model for the babassu palm tree population dynamics – Estimated from anthropogenic open area data sets

Contact Info

Product

Resources

About