Mariana Dias

VALE | VALE · Environmental genomics

Background Canga is the Brazilian term for the savanna-like vegetation harboring several endemic species on iron-rich rocky outcrops, usually considered for mining activities. Parkia platycephala Benth. and Stryphnodendron pulcherrimum (Willd.) Hochr. naturally occur in the cangas of Serra dos Carajás (eastern Amazonia, Brazil) and the surrounding...

Background Canga is the Brazilian term for the savanna-like vegetation harboring several endemic species on iron-rich rocky outcrops, usually considered for mining activities. Parkia platycephala Benth. and Stryphnodendron pulcherrimum (Willd.) Hochr. naturally occur in the cangas of Serra dos Carajás (eastern Amazonia, Brazil) and the surrounding...

The canga of the Serra dos Carajás, in Eastern Amazon, is home to a unique open plant community, harboring several endemic and rare species. Although a complete flora survey has been recently published, scarce to no genetic information is available for most plant species of the ironstone outcrops of the Serra dos Carajás. In this scenario, DNA barc...

The quillwort Isoëtes cangae is a critically endangered species occurring in a single lake in Serra dos Carajás, Eastern Amazon. Low genetic diversity and small effective population sizes (N e) are expected for narrow endemic species (NES). Conservation biology studies centered in a single species show some limitations, but they are still useful co...

The canga of the Serra dos Carajás, in Eastern Amazon, is home to a unique open plant community, harbouring several endemic and rare species. Although a complete flora survey has been recently published, scarce to no genetic information is available for most plant species of the ironstone outcrops of the Serra dos Carajás. In this scenario, DNA bar...

Este compêndio de trabalhos técnico-científicos elaborados na Gerência de Espeleologia e Tecnologia trata-se de uma síntese dos principais artigos publicados em periódicos nacionais e internacionais e congressos científicos entre os anos de 2018 e 2019. No intuito de se aprimorar os conhecimentos da dinâmica e funcionamento dos ecossistemas cavern...

The complete mitochondrial genome of a specimen of Cydnidae was shotgun sequenced and each partition was characterized. This genome, with 15,289 bp in length, has all of the 37 genes commonly found in metazoan mitochondrial genomes: two for ribosomal RNAs (rRNAs), 22 for transfer RNAs (tRNAs), and 13 for proteins. Protein-coding and ribosomal genes...

Isoetes are ancient quillworts members of the only genus of the order Isoetales. The genus is slow evolving but is resilient, and widespread worldwide. Two recently described species occur in the Eastern Brazilian Amazon, Isoetes serracarajensis and Isoetes cangae. They are found in the ironstone grasslands known as Canga. While I. serracarajensis...

Specimens collected for genetic and morphological analyses. (DOCX)

SNPs observed in the chloroplast genomes of specimens of I. serracarajensis and I. cangae mapped against ITV411 of I. serracarajensis. (XLSX)

SNPs observed in the chloroplast genomes of specimens of I. serracarajensis and I. cangae mapped against ITV2008 of I. cangae. (XLSX)

Codon usage for Isoetes flaccida and the Carajás species. (XLSX)

Multiple alignment of the ITS2. The species and the sampled locations are shown in the left. Polymorphic sites are marked in green and yellow for I. cangae and in blue for I. serracarajensis. (TIF)

Bioinformatics command lines used. (DOCX)

Statistics on NGS data for whole genome sequencing. (XLSX)

Chloroplast gene content for I. cangae and I. serracarajensis. Genes were annotated in CPGAVAS [35], names in bold were annotated using DOGMA [34]. The copy number of each gene and transcribed strands are shown. (XLSX)

Microspore measurements. Box plots of equatorial diameter length, equatorial diameter width, polar diameter, leasure width, leasura hight, and radii with TLI for I. cangae and I. serracarajensis with and without silica. All units in the y-axis are in μm. (TIF)

Plants living above and around caves represent an important, albeit poorly studied, resource within cave ecosystems. The presence of plant material (root-like structures or rhizothemes, saplings, seeds, seedlings) correlates positively with the biodiversity of the cave dwelling animals as shown for iron-ore caves in Carajás, Pará, Brazil. Plant mat...

Amazon comprises a vast variety of ecosystems, including savannah-like Canga barrens that evolved on iron-lateritic rock plateaus of the Carajás Mountain range. Individual Cangas are enclosed by the rain forest, indicating insular isolation that enables speciation and plant community differentiation. To establish a framework for the research on nat...

The increase in atmospheric CO2 concentration predicted to the end of this century may cause several alterations on plant species development, which shall result in changes in the structure and function of plant communities. The present work aimed to investigate the effects of the increase in atmospheric CO2 concentration on the development of Bacc...