Results 111 to 120 of about 63,195 (262)

The global speciation continuum of the cyanobacterium Microcoleus

Nature Communications
Speciation is a continuous process driven by genetic, geographic, and ecological barriers to gene flow. It is widely investigated in multicellular eukaryotes, yet we are only beginning to comprehend the relative importance of mechanisms driving the ...
Aleksandar Stanojković, Svatopluk Skoupý, Hanna Johannesson, Petr Dvořák   +3 more
doaj   +1 more source

speciation through asexuality in fish: postzygotic reproductive isolation may be completed in spite of fertility of hybrids

Frontiers in Marine Science, 2015
Speciation process often occurs in the face of hybridisation between forming species. Hybrid genomic constitution of many clonal organisms including fish, amphibians and reptiles also indicates tight linkage between hybridization, clonality and ...
Karel Janko, Karel Janko, Hilde Wilkinson Herbots, Jakub Ridl, Jan Roslein, Radka Reifova   +5 more
doaj   +1 more source

Population genomics indicate three different modes of divergence and speciation with gene flow in the green-winged teal duck complex. [PDF]

Mol Phylogenet Evol, 2023
Spaulding F, McLaughlin JF, Cheek RG, McCracken KG, Glenn TC, Winker K.   +5 more
europepmc   +1 more source

Possible speciation with gene flow in tropical cave snails

Journal of Zoological Systematics and Evolutionary Research, 2005
In this paper, we present a newly-discovered troglobitic species of the snail genus Georissa from a limestone cave in Borneo. Molecular phylogenetic analysis of 16S mitochondrial DNA sequences shows that its ancestor is the local epigean population of Georissa saulae, living in the rainforest directly at the cave entrances.
M. Schilthuizen, A. S. Cabanban, M. Haase   +2 more
openaire   +1 more source

Exploring Interactive Effects of Arsenic and Selenium Exposure on Larval Zebrafish (Danio rerio)

Environmental Toxicology, EarlyView.
ABSTRACT Arsenic contamination in aquatic ecosystems is a major environmental concern. Selenium (Se) helps mitigate oxidative stress and hence could reduce the toxic effects of arsenic. However, Se can also be toxic at high concentrations. Given that these metalloids commonly co‐occur in the environment, there is a pressing need for further research ...
Owen Luo, Jinnath Rehana Ritu, Md Helal Uddin, Sravan Kumar Putnala, Mahesh Rachamalla, Som Niyogi, Douglas P. Chivers   +6 more
wiley   +1 more source

Epigenetic induction may speed up or slow down speciation with gene flow. [PDF]

Evolution, 2022
Greenspoon PB, Spencer HG, M'Gonigle LK.
europepmc   +1 more source

Gene flow persists millions of years after speciation in Heliconius butterflies [PDF]

BMC Evolutionary Biology, 2008
Hybridization, or the interbreeding of two species, is now recognized as an important process in the evolution of many organisms. However, the extent to which hybridization results in the transfer of genetic material across the species boundary (introgression) remains unknown in many systems, as does the length of time after initial divergence that the
openaire   +4 more sources

Cyanogenic Compounds, Physicochemical Parameters and Metals in Water From Cassava Processing Areas: A Study in the Brazilian Amazon, Using Multivariate Analysis

Environmental Toxicology, EarlyView.
ABSTRACT This study evaluated the water quality of artesian wells and effluents generated in cassava processing in a rural area of Bragança, Pará, with emphasis on physicochemical parameters, multielement composition, and cyanogenic compounds. The well water presented specific nonconformities, highlighting pH values below the recommended level and high
Alana Coêlho Maciel, Mariane Gama Nabiça, Luciana Pinheiro Santos, Thiago de Melo e Silva, Elivaldo Nunes Modesto Junior, Heronides Adonias Dantas Filho, Charles Miller de Souza Borges, Kelly das Graças Fernandes Dantas, Simone de Fátima Pinheiro Pereira, Ivan Carlos da Costa Barbosa, Beni Jequicene Mussengue Chaúque, Rosinelson da Silva Pena, Nayara Macêdo Peixoto Araújo, Alessandra Santos Lopes   +13 more
wiley   +1 more source

Biome stability predicts population structure of a southern African aridland bird species

Ecology and Evolution, 2020
Environments are heterogeneous in space and time, and the permeability of landscape and climatic barriers to gene flow may change over time. When barriers are present, they may start populations down the path toward speciation, but if they become ...
Guinevere O. U. Wogan, Gary Voelker, Graeme Oatley, Rauri C. K. Bowie   +3 more
doaj   +1 more source

Assessment of Oxidative Stress, Vitellogenin, and Human Health Risks Derived From Nile Tilapia Exposed to Metals and Metalloids in Southeastern Brazil

Environmental Toxicology, EarlyView.
ABSTRACT Urban coastal lagoons are highly vulnerable ecosystems increasingly affected by metal contamination, as well as multiple anthropogenic stressors. This study evaluated ecotoxicological and human health risks associated with chronic metal exposure in Nile tilapia (Oreochromis niloticus) from an anthropogenically impacted lagoon in southeastern ...
Julia Araújo Alves, Priscila M. O. Muniz Cunha, Shênia Patrícia Corrêa Novo, Lorena Oliveira Souza Soares, Tatiana Dillenburg Saint‐Pierre, Fábio Veríssimo Correia, André Luís de Sá Salomão, Rachel Ann Hauser‐Davis, Enrico Mendes Saggioro   +8 more
wiley   +1 more source