Publications by authors named "Joan T Pereira"

Article Synopsis
  • Research on flowering plants has evolved from focusing solely on pollinator specificity to considering introgressive hybridization as a significant factor affecting species relationships.
  • A study on fig trees (Moraceae) uses extensive genetic sampling to explore phylogenetic ties and the role of hybridization among 520 species, revealing that local introgression occurs despite overall reproductive isolation.
  • Findings indicate that while hybridization contributes to plant evolution, strong plant-pollinator relationships can prevent ongoing hybridization between unrelated lineages, maintaining genetic stability in figs.
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Indigenous peoples are important stewards of biodiversity, often living near and possessing intimate knowledge of ecosystems. As a result, species new to science may be long known to indigenous people. While the scientific endeavor has long benefitted from indigenous knowledge, it has usually not engaged with it on equal footing.

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We present a 517-gene phylogenetic framework for the breadfruit genus Artocarpus (ca. 70 spp., Moraceae), making use of silica-dried leaves from recent fieldwork and herbarium specimens (some up to 106 years old) to achieve 96% taxon sampling.

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Natural history collections and tropical tree diversity are both treasure troves of biological and evolutionary information, but their accessibility for scientific study is impeded by a number of properties. DNA in historical specimens is generally highly fragmented, complicating the recovery of high-grade genetic material. Furthermore, our understanding of hyperdiverse, wide-spread tree assemblages is obstructed by extensive species ranges, fragmented knowledge of tropical tree diversity and phenology, and a widespread lack of species-level diagnostic characters, prohibiting the collecting of readily identifiable specimens which can be used to build, revise or strengthen taxonomic frameworks.

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Article Synopsis
  • Conservation planning usually focuses on either protecting where species live or making sure they can move between areas, but not both at the same time.
  • A new method was created to help protect wildlife, forests, and carbon, while also allowing animals to move around better.
  • In Sabah, Malaysia, this method helped to increase the protection of places animals use to travel by a lot, while only slightly reducing the protection of carbon trees and butterflies.
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Premise Of The Study: Underutilized crops and their wild relatives are important resources for crop improvement and food security. Cempedak [Artocarpus integer (Thunb). Merr.

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Background And Aims: The breadfruit genus ( Artocarpus , Moraceae) includes valuable underutilized fruit tree crops with a centre of diversity in Southeast Asia. It belongs to the monophyletic tribe Artocarpeae, whose only other members include two small neotropical genera. This study aimed to reconstruct the phylogeny, estimate divergence dates and infer ancestral ranges of Artocarpeae, especially Artocarpus , to better understand spatial and temporal evolutionary relationships and dispersal patterns in a geologically complex region.

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Tropical mountains are hot spots of biodiversity and endemism, but the evolutionary origins of their unique biotas are poorly understood. In varying degrees, local and regional extinction, long-distance colonization, and local recruitment may all contribute to the exceptional character of these communities. Also, it is debated whether mountain endemics mostly originate from local lowland taxa, or from lineages that reach the mountain by long-range dispersal from cool localities elsewhere.

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