Publications by authors named "Raquel Negrao"
Article Synopsis
- Angiosperms are vital for ecosystems and human life, making it important to understand their evolutionary history to grasp their ecological dominance.
- The study builds an extensive tree of life for about 8,000 angiosperm genera using 353 nuclear genes, significantly increasing the sampling size and refining earlier classifications.
- The findings reveal a complex evolutionary history marked by high gene tree conflict and rapid diversification, particularly during the early angiosperm evolution, with shifts in diversification rates linked to global temperature changes.
Orchids constitute one of the most spectacular radiations of flowering plants. However, their origin, spread across the globe, and hotspots of speciation remain uncertain due to the lack of an up-to-date phylogeographic analysis. We present a new Orchidaceae phylogeny based on combined high-throughput and Sanger sequencing data, covering all five subfamilies, 17/22 tribes, 40/49 subtribes, 285/736 genera, and c.
View Article and Find Full Text PDFReliably documenting plant diversity is necessary to protect and sustainably benefit from it. At the heart of this documentation lie species concepts and the practical methods used to delimit taxa. Here, we apply a total-evidence, iterative methodology to delimit and document species in the South American genus (Nymphaeaceae).
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- In 2012, the IUCN initiated the development of the "Green Status of Species" to assess species recovery and the impact of conservation efforts.
- The Green Status framework includes a method to evaluate species recovery, featuring metrics like conservation legacy and recovery potential, tested on 181 diverse species.
- Findings showed that 59% of species were largely or critically depleted, highlighting that recovery status differs from extinction risk, and indicating the effectiveness of conservation efforts on the majority of species tested.
Hantaviruses is an emerging infectious disease. Although HCPS has been reported in several regions of Brazil, more cases of HCPS have recently been reported in Minas Gerais than in any other state. In 2009, we analyzed 27 samples presenting antibodies against hantaviruses.
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