Data from: Floral antagonists counteract pollinator-mediated selection on attractiveness traits in the hummingbird-pollinated Collaea cipoensis (Fabaceae)Irene Gélvez-Zúñiga, Alberto L. Teixido, Ana Carolina O. Neves & Geraldo Wilson Fernandes
Pollinator-mediated selection towards larger and abundant flowers is common in naturally pollen-limited populations. However, floral antagonists may counteract this effect, maintaining smaller- and few-flowered individuals within populations. We quantified pollinator and antagonist visit rates and determined a multiplicative female fitness component from attacked and non-attacked flowers of the Brazilian hummingbird-pollinated shrub Collaea cipoensis to determine the selective effects of pollinators and floral antagonists on flower size and number. We predicted that floral antagonists reduce the...
Domesticated maize evolved from wild teosinte under human influences in Mexico beginning around 9,000 BP, traversed Central America by ~7,500 BP, and spread into South America by ~6,500 BP. Landrace and archaeological maize genomes from South America suggest that the ancestral population to South American maize was brought out of the domestication center in Mexico and became isolated from the wild teosinte gene pool before traits of domesticated maize were fixed. Deeply structured lineages then...
The nutrient demands of regrowing tropical forests are partly satisfied by nitrogen (N)-fixing legume trees, but our understanding of the abundance of those species is biased towards wet tropical regions. Here we show how the abundance of Leguminosae is affected by both recovery from disturbance and large-scale rainfall gradients through a synthesis of forest-inventory plots from a network of 42 Neotropical forest chronosequences. During the first three decades of natural forest regeneration, legume basal area...
Data from: Y chromosome sequences reveal a short Beringian Standstill, rapid expansion, and early population structure of Native American foundersThomaz Pinotti, Susana Revollo, Cézar Paz-Y-Miño, Ricardo Fujita, Fabrício Rodrigues Santos, Chris Tyler-Smith, Toomas Kivisild, Qasim Ayub, Anders Bergström, Yali Xue, Cinthia Cuellar, Dominique Ohasi, Daniela R. Lacerda, Marilza S. Jota, José E. Santos & Arne Solli
The Americas were the last inhabitable continents to be occupied by humans, with a growing multidisciplinary consensus for entry 15-25 thousand years ago (kya) from northeast Asia via the former Beringia land bridge. Autosomal DNA analyses have dated the separation of Native American ancestors from the Asian gene pool to 23 kya or later, and mtDNA analyses to ~25 kya, followed by isolation (‘Beringian Standstill’) for 2.4-9 ky and then a rapid expansion throughout the...
Data from: Validity of the Diplostomoidea and Diplostomida (Digenea, Platyhelminthes) upheld in phylogenomic analysisSean A. Locke, Alex Van Dam, Monica Caffara, Hudson Alves Pinto, Danimar Lopez-Hernandez & Christopher A. Blanar
Higher systematics within the Digenea, Carus 1863 have been relatively stable since a phylogenetic analysis of partial nuclear ribosomal markers (rDNA) led to the erection of the Diplostomida Olson, Cribb, Tkach, Bray, and Littlewood, 2003. However, recent mitochondrial (mt) genome phylogenies suggest this order might be paraphyletic. These analyses show members of two diplostomidan superfamilies are more closely related to the Plagiorchiida La Rue, 1957 than to other members of the Diplostomida. In one of...
Data from: Phylogenetic systematics of subtribe Spiranthinae (Orchidaceae: Orchidoideae: Cranichideae) based on nuclear and plastid DNA sequences of a nearly complete generic sampleGerardo A. Salazar, Joao A.N. Batista, Lidia I. Cabrera, Cassio Van Den Berg, W. Mark Whitten, Eric C. Smidt, Cristiano R. Buzatto, Rodrigo B. Singer, Gunter Gerlach, Rolando Jimenez-Machorro, Jose A. Radins, Irma S. Insaurralde, Leonardo R.S. Guimaraes, Fabio De Barros, Francisco Tobar, Jose L. Linares, Ernesto Mujica, Robert L. Dressler, Mario A. Blanco, Eric Hagsater & Mark W. Chase
Subtribe Spiranthinae is the most species-rich lineage of terrestrial Neotropical orchids, encompassing > 500 species and 40 genera. We conducted maximum parsimony and maximum likelihood phylogenetic analyses of DNA sequence data of plastid matK-trnK and trnL-trnF and nuclear ribosomal ITS sequences for 36 genera and 182 species of Spiranthinae plus appropriate outgroups. The results strongly support monophyly of Spiranthinae (minus Discyphus, Discyphinae and Galeottiella, Galeottiellinae) and five major lineages, namely monospecific Cotylolabium (sister to the...
Data from: Hypothesised diprotomeric enzyme complex supported by stochastic modelling of Palytoxin-induced Na/K pump channelsGabriel D. Vilallonga, Antônio-Carlos G. De Almeida, Keelson T. Ribeiro, Sérgio V.A. Campos, Antônio M. Rodrigues & Sergio V. A. Campos
The sodium-potassium pump (Na+/K+ pump) is crucial for cell physiology. Despite great advances in the understanding of this ionic pumping system, its mechanism is not completely understood. We propose the use of the Statistical Model Checker to investigate palytoxin-induced Na+/K+ pump channels. We modelled a system of reactions representing transitions between the conformational substates of the channel with parameters, concentrations of the substates, and reaction rates extracted from simulations reported in the literature, based on...
The distribution patterns of animal species at local scales have been explained by direct influences of vegetation structure, topography, food distribution and availability. However, these variables can also interact and operate indirectly on the distribution of species. Here, we examined the direct and indirect effects of food availability (fruits and insects), vegetation clutter and elevation in structuring phyllostomid-bat assemblages in a continuous terra firme forest in Central Amazonia. Bats were captured in 49 plots over...
Universidade Federal de Minas Gerais8
National Autonomous University of Mexico2
University of Sao Paulo2
Federal University of Southern Bahia1
National Museum of Natural History1
National University of San Luis1
College of the Atlantic1