Arielli F. Machado

• Phd
• PostDoc Position at Federal University of Pampa

Aim Understanding the spatial structuring of ecological communities involves considering the interplay between evolutionary history and environmental factors. This study investigates how the phylogenetic structure of Canidae influences the geographical distribution and trait patterns of lineages globally, and how these patterns relate to Bergmann's...

Landscape characteristics can influence gene flow depending on the species ability to disperse. This imposes different levels of resistance to movement, determining the genetic structure and diversity of populations. Waterfalls and rapids in the Amazon basin have been suggested as contributing factors to the diversification and genetic structure of...

Despite the current disjoint distribution of Amazonian and Atlantic forests, evidence suggests past historical connections. Here we investigated the historical connections between three didelphid mammal species from Amazonian and Atlantic forests (Caluromys philander, Marmosa demerarae, and M. murina) using comparative phylogeography and paleodistr...

The End-Permian Mass Extinction marked a critical turning point in Earth's history, and the biological recovery that followed the crisis led to the emergence of several modern vertebrate and invertebrate taxa. Even considering the importance of the Early Triassic biotic recovery for the evolution of modern faunas and floras, our knowledge of this e...

Despite the disjunct distribution of the Amazonian and the Atlantic forests, three historical connections between those biomes have been hypothesized: through Northeast Brazil, the Brazilian Cerrado, and the Southeast-Northwest. Temporal variation has been suggested to occur in these connections, with recent connections for the Northeast and older...

Investigating parallel roles of geography and environmental heterogeneity in diversification provides insights on how neutral and selective forces drive evolution of biological systems. Here, we investigate whether geographic and climatic distances explain either genetic or phenotypic variation in Blue-crowned Manakins (Lepidothrix coronata), a pol...

Aim Understanding the spatial structuring of ecological communities requires us to consider the interplay between evolutionary history and environmental factors. In this study, we investigated the influence of Canidae phylogenetic structure on the distribution and trait patterns of lineages across the planet. Location Americas, Africa, Eurasia. T...

Landscape features can influence gene flow detected in genetic structure and diversity. The effect will depend on the ability to disperse and may vary between species. Waterfalls and rapids in the Amazon basin have been suggested as causing the diversification and genetic structure of freshwater species, including turtles. Thus, we evaluated the sp...

Despite the disjunct distribution of Amazonian and Atlantic forests, evidence suggests historical connections. Here we investigated the historical connections between three didelphid mammal species from Amazonian and Atlantic forests ( Caluromys philander , Marmosa murina and Marmosa demerarae ) to uncover these connections using a comparative phyl...

The brown or pouchless four-eyed opossums or jupatis represent the genus Metachirus with a wide geographical range in the Neotropics. Recent studies show distinct monophyletic clades with high genetic divergence and recognized two species, Metachirus nudicaudatus and Metachirus myosuros. Nevertheless, there is a need for systematic revision with mu...

Amazonian mammal diversity is exceptionally high, yet new taxonomic discoveries continue to be made and many questions remain for understanding its diversification through time and space. Here we investigate the diversification of spiny rats in the genus Makalata, whose species are strongly associated with seasonally flooded forests, watercourses a...

Cyclopes didactylus , the smallest of all anteaters, inhabits Amazonian and Atlantic forests with an apparently disjunct distribution. Yet, phylogeography reveals historical connections through the forests of the Northeast Region of Brazil. Its populations in this region are classified by the Red List of Threatened Species as Data Deficient and wit...

Conservation genetics provides wildlife managers powerful tools to assist conservation planning, being recognized as an important biodiversity component. Nevertheless, communication between wildlife conservation actors is still not effective. Furthermore, wildlife conservation funds are often allocated to conservation actions incompatible with thor...

New record of Red Side-necked Turtle Rhinemys rufipes, the first record in the Urubu River region, 200 km east of the nearest previous known record in Manaus and 150 km west of Igarapé Açu

Context Waterfalls and rapids of Amazon basin have been suggested as causing the speciation and genetic structure of many freshwater species, including turtles. The species behavior affects the way waterfalls and rapids limit gene flow. The Yellow-spotted River Turtle ( Podocnemis unifilis ), a widely distributed and endangered Amazonian turtle, do...

Apresentação dos resultados dos estudos e compilação dos dados relativos à biodiversidade da fauna maranhense voltados para a elaboração do zoneamento ecológico e econômico dos biomas Amazônia e Cerrado e Costeiro no Maranhão. São apresentadas uma série de sugestões de ação e manejo, inclusive com a proposta de criação da "Reserva da Biosfera Gurup...

The Neotropics is one of the most diverse regions of the globe in terms of plants and animal species. Regarding the microbial world, however, little is known about the diversity and biogeography patterns of microorganisms in the Neotropics. The biogeography of several microbial taxonomic groups is still missing and/or incomplete, such as the protis...

Much evidence suggests that Amazonia and the Atlantic Forest were connected through at least three dispersion routes in the past: the Eastern route, the central route, and the Western route. However, few studies have assessed the use of these routes based on multiple species. Here we present a compilation of mammal species that potentially have dis...

Much evidence suggests that Amazonia and the Atlantic Forest were connected through at least three dispersion routes in the past: the northeast route, the central route, and the southeast-northwest route. According to previous studies, the southeast-northwest route would have been the most frequently used. However, few studies have assessed the use...

The Neotropical region is one of the most diverse regions of the globe in terms of macro-organismic species. Regarding the microbial world, however, little is known about the diversity and biogeography patterns of micro-organisms in the Neotropics. In this context, the study of several microbial taxonomic groups is still missing and/or incomplete,...

Movements under environmental structures and on supports, and the use of shelters by Akodon montensis were assessed using the spool-and-line technique. Movements of a few individuals of Thaptomys nigrita , Brucepattersonius iheringi and Oligoryzomys nigripes were also assessed and briefly described. Akodon montensis often used fallen logs, lianas a...

Several hypotheses have been used to explain diversification in the Neotropics. Integrating evolution with ecology extends the scope of testing the frameworks of these hypotheses. We test diversification hypotheses by integrating phylogeography and ecological niche models (ENMs) using the rodent Hylaeamys megacephalus (Azara’s broad-headed oryzomys...

Didelphis aurita and D. albiventris are widely distributed in South America, with a range of sympatry in the limit of their distribution, particularly in Araucaria mixed ombrophilous forest in the southern Atlantic Forest. We investigated the spatial, feeding, and time use between these morphologically similar species in a remnant of Araucaria fore...

We investigated how the small-mammal community is structured in a deciduous forest in southern Brazil, analysing the patterns of vertical and horizontal distribution. We used 12 transect lines, with 180 live-traps distributed on the ground and in the understory, and 12 pitfall traps in total. During six field sessions, we captured 510 individuals b...

We investigated how the small-mammal community is structured in a deciduous forest in southern Brazil, analysing the patterns of vertical and horizontal distribution. We used 12 transect lines, with 180 live-traps distributed on the ground and in the understory, and 12 pitfall traps in total. During six field sessions, we captured 510 individuals b...