Results 41 to 50 of about 995 (50)

Small spatial intervals, big environmental variation: Restinga ecosystems are potential inducers of ecological speciation in the tropical tree Protium icicariba (Burseraceae) [PDF]

Acta Botânica Brasílica
Restingas are ecosystems formed by diverse environments and plant populations separated by small spatial intervals. In this sense, we investigated the morphological, anatomical, and physiological characteristics of two populations of Protium icicariba ...
Fabiano Caprini Volponi, Ramon Negrão Santos Junior, Bernardo Pretti Becacici Macieira, Paulo Cezar Cavatte   +3 more
doaj   +1 more source

On the processes generating latitudinal richness gradients: identifying diagnostic patterns and predictions

Frontiers in Genetics, 2014
We use a simulation model to examine four of the most common hypotheses for the latitudinal richness gradient and identify patterns that might be diagnostic of those four hypotheses.
Allen eHurlbert, Allen eHurlbert, James eStegen   +2 more
doaj   +1 more source

Sympatric speciation: when is it possible in bacteria?

PLoS ONE, 2013
According to theory, sympatric speciation in sexual eukaryotes is favored when relatively few loci in the genome are sufficient for reproductive isolation and adaptation to different niches. Here we show a similar result for clonally reproducing bacteria,
Jonathan Friedman, Eric J Alm, B Jesse Shapiro   +2 more
doaj   +1 more source

You stay, but I Hop: Host shifting near and far co‐dominated the evolution of Enchenopa treehoppers

Ecology and Evolution, 2018
The importance and prevalence of phylogenetic tracking between hosts and dependent organisms caused by co‐evolution and shifting between closely related host species have been debated for decades.
Yu‐Hsun Hsu, Reginald B. Cocroft, Robert L. Snyder, Chung‐Ping Lin   +3 more
doaj   +1 more source

Phenotypic disparity in Iberian short-horned grasshoppers (Acrididae): the role of ecology and phylogeny

BMC Evolutionary Biology, 2017
Background The combination of model-based comparative techniques, disparity analyses and ecomorphological correlations constitutes a powerful method to gain insight into the evolutionary mechanisms that shape morphological variation and speciation ...
Vicente García-Navas, Víctor Noguerales, Pedro J. Cordero, Joaquín Ortego   +3 more
doaj   +1 more source

Speciation happens in company – not in isolation

npj Biodiversity
Oceanic islands are considered the classic arenas for allopatric speciation and adaptive radiation. Established concepts of speciation and endemism are strongly focused on spatial and temporal scales.
Carl Beierkuhnlein
doaj   +1 more source

Patterns of gene flow define species of thermophilic Archaea.

PLoS Biology, 2012
Despite a growing appreciation of their vast diversity in nature, mechanisms of speciation are poorly understood in Bacteria and Archaea. Here we use high-throughput genome sequencing to identify ongoing speciation in the thermoacidophilic Archaeon ...
Hinsby Cadillo-Quiroz, Xavier Didelot, Nicole L Held, Alfa Herrera, Aaron Darling, Michael L Reno, David J Krause, Rachel J Whitaker   +7 more
doaj   +1 more source

The latitudinal variation in amphibian speciation rates revisited

Communications Biology
Speciation can increase regional species richness, however, our knowledge of how and why speciation rates vary across space is still incomplete. Using comprehensive information on species distributions and their phylogenetic relationships, we describe ...
Adrián García-Rodríguez, Fabricio Villalobos, Julián A. Velasco, Franz Essl, Gabriel C. Costa   +4 more
doaj   +1 more source

Proteins Associated with Salinity Adaptation of the Dinoflagellates: Diversity and Potential Involvement in Species Evolution

Diversity
Protists inhabit marine, brackish and fresh waters. The salt barrier plays an important role in the origin of their diversity. Salinity tolerance differs among species and sometimes even among different strains of the same species, indicating local ...
Nataliia V. Annenkova
doaj   +1 more source

Negative global-scale association between genetic diversity and speciation rates in mammals

Nature Communications
Genetic diversity is critical for species evolution and their adaptability to global changes, while speciation rate is critical for explaining large-scale patterns of species richness. Exploring correlates of variation in genetic diversity and speciation
Ana C. Afonso Silva, Odile Maliet, Leandro Aristide, David Nogués-Bravo, Nathan Upham, Walter Jetz, Hélène Morlon   +6 more
doaj   +1 more source