Sympatric population divergence within a highly pelagic seabird species complex (Hydrobatesspp.)

2018 ◽  
Vol 49 (1) ◽  
Author(s):  
Rebecca S. Taylor ◽  
Anna Bailie ◽  
Previn Gulavita ◽  
Tim Birt ◽  
Tomas Aarvak ◽  
...  
Keyword(s):  
Species Complex ◽  
Population Divergence ◽  
Sympatric Population ◽  
Seabird Species ◽  
Pelagic Seabird

scholarly journals Widespread gene flow between oceans in a pelagic seabird species complex

2017 ◽  
Vol 26 (20) ◽  
pp. 5716-5728 ◽  
Author(s):  
Katherine A. Booth Jones ◽  
Malcolm A. C. Nicoll ◽  
Claire Raisin ◽  
Deborah A. Dawson ◽  
Helen Hipperson ◽  
...  
Keyword(s):  
Gene Flow ◽  
Species Complex ◽  
Seabird Species ◽  
Pelagic Seabird

scholarly journals Foraging plasticity in a pelagic seabird species along a marine productivity gradient

2010 ◽  
Vol 398 ◽  
pp. 259-274 ◽  
Author(s):  
VH Paiva ◽  
P Geraldes ◽  
I Ramírez ◽  
A Meirinho ◽  
S Garthe ◽  
...  
Keyword(s):  
Seabird Species ◽  
Productivity Gradient ◽  
Marine Productivity ◽  
Pelagic Seabird

Polymorphism in male genitalia ofAedes(Ochlerotatus)scapularisRondani, 1848

2017 ◽  
Vol 108 (1) ◽  
pp. 1-4
Author(s):  
V. Petersen ◽  
F. Virginio ◽  
L. Suesdek
Keyword(s):  
Male Genitalia ◽  
Species Complex ◽  
Vector Competence ◽  
Bilateral Symmetry ◽  
High Variability ◽  
Population Divergence ◽  
Incipient Speciation ◽  
Single Population ◽  
Taxonomic Marker ◽  
Species Specific

AbstractMorphology of male genitalia of culicids is generally species-specific and often used as a taxonomic marker. However, some characters of the male genitalia vary intraspecifically and are not taxonomically diagnostic. This might be the case ofAedes scapularis, a Neotropical culicid with vector competence for arboviruses and filarial worms. Males of this species may or not present a retrorse process (RP) in the genitalic claspette filaments, which led authors to suspect that this variance might be indicative of population divergence or incipient speciation process. This suspicion has not been investigated hitherto and it is not known if there are variable patterns of RPs. We hypothesized that the presence of the RP varies intraspecifically inAe. scapularisand then we statistically evaluated the variability of this character in a single population. To this study the genitalia of 73 males ofAe. scapulariswere prepared, and their RPs were meristically quantified and categorized according to the phenotypes observed. We noted that the presence or RPs is a polymorphic character because it varied inter and intra-individually. The presence of a single RP on each claspette filament was the predominant pattern (77%), but absent or multiple RPs in each filament were also found either in bilateral symmetry or asymmetry. Thus, we conclude that the presence of RPs owing to its high variability is not indicative of populational divergence or diagnostic of species complex withinAe. scapularis.

scholarly journals Six pelagic seabird species of the North Atlantic engage in a fly-and-forage strategy during their migratory movements

2021 ◽  
Author(s):  
F Amélineau ◽  
B Merkel ◽  
A Tarroux ◽  
S Descamps ◽  
T Anker-Nilssen ◽  
...  
Keyword(s):  
North Atlantic ◽  
Seabird Species ◽  
The North ◽  
The North Atlantic ◽  
Migratory Movements ◽  
Pelagic Seabird

scholarly journals Density-dependent foraging and colony growth in a pelagic seabird species under varying environmental conditions

2013 ◽  
Vol 485 ◽  
pp. 287-294 ◽  
Author(s):  
RD Davies ◽  
S Wanless ◽  
S Lewis ◽  
KC Hamer
Keyword(s):  
Environmental Conditions ◽  
Colony Growth ◽  
Seabird Species ◽  
Density Dependent ◽  
Pelagic Seabird

Can variations in the spatial distribution at sea and isotopic niche width be associated with consistency in the isotopic niche of a pelagic seabird species?

2014 ◽  
Vol 161 (8) ◽  
pp. 1861-1872 ◽  
Author(s):  
Filipe R. Ceia ◽  
Vitor H. Paiva ◽  
Stefan Garthe ◽  
João C. Marques ◽  
Jaime A. Ramos
Keyword(s):  
Spatial Distribution ◽  
Niche Width ◽  
Isotopic Niche ◽  
Seabird Species ◽  
Pelagic Seabird ◽  
Isotopic Niche Width

scholarly journals Interspecies recombination has driven the macroevolution of cassava mosaic begomoviruses

2021 ◽  
Author(s):  
Alvin Crespo-Bellido ◽  
J. Steen Hoyer ◽  
Divya Dubey ◽  
Ronica B. Jeannot ◽  
Siobain Duffy
Keyword(s):  
Species Complex ◽  
Mosaic Disease ◽  
Genetic Exchange ◽  
Phylogenetic Networks ◽  
Detection Methods ◽  
Cassava Mosaic Disease ◽  
Population Divergence ◽  
Bipartite Begomovirus ◽  
Virus Species ◽  
Interspecies Recombination

Begomoviruses (family Geminiviridae , genus Begomovirus ) significantly hamper crop production and threaten food security around the world. The frequent emergence of new begomovirus genotypes is facilitated by high mutation frequencies and the propensity to recombine and reassort. Homologous recombination has been especially implicated in the emergence of novel cassava mosaic begomovirus (CMB) genotypes, which cause cassava mosaic disease (CMD). Cassava ( Manihot esculenta ) is a staple food crop throughout Africa, and an important industrial crop in Asia, two continents where production is severely constrained by CMD. The CMD species complex is comprised of 11 bipartite begomovirus species with ample distribution throughout Africa and the Indian subcontinent. While recombination is regarded as a frequent occurrence for CMBs, a revised, systematic assessment of recombination and its impact on CMB phylogeny is currently lacking. We assembled data sets of all publicly available, full-length DNA-A (n=880) and DNA-B (n=369) nucleotide sequences from the 11 recognized CMB species. Phylogenetic networks and complementary recombination detection methods revealed extensive recombination among the CMB sequences. Six out of the eleven species have descended from unique interspecies recombination events. Estimates of recombination and mutation rates revealed that all species experience mutation more frequently than recombination, but measures of population divergence indicate that recombination is largely responsible for the genetic differences between species. Our results support that recombination has significantly impacted the CMB phylogeny and has driven speciation in the CMD species complex. IMPORTANCE Cassava mosaic disease (CMD) is a significant threat to cassava production throughout Africa and Asia. CMD is caused by a complex comprised of 11 recognized virus species exhibiting accelerated rates of evolution, driven by high frequencies of mutation and genetic exchange. Here, we present a systematic analysis of the contribution of genetic exchange to cassava mosaic virus species-level diversity. Most of these species emerged as a result of genetic exchange. This is the first study to report the significant impact of genetic exchange on speciation in a group of viruses.

scholarly journals Cryptic species and independent origins of allochronic populations within a seabird species complex (Hydrobates spp.)

2019 ◽  
Vol 139 ◽  
pp. 106552 ◽  
Author(s):  
Rebecca S. Taylor ◽  
Mark Bolton ◽  
Annalea Beard ◽  
Tim Birt ◽  
Petra Deane-Coe ◽  
...  
Keyword(s):  
Cryptic Species ◽  
Species Complex ◽  
Seabird Species

scholarly journals Interspecies recombination has driven the macroevolution of cassava mosaic begomoviruses

2021 ◽  
Author(s):  
Alvin Crespo-Bellido ◽  
John Steen Hoyer ◽  
Divya Dubey ◽  
Ronica B. Jeannot ◽  
Siobain Duffy
Keyword(s):  
Species Complex ◽  
Crop Production ◽  
Indian Subcontinent ◽  
Mosaic Disease ◽  
Phylogenetic Networks ◽  
Detection Methods ◽  
Cassava Mosaic Disease ◽  
Population Divergence ◽  
Bipartite Begomovirus ◽  
Interspecies Recombination

Begomoviruses (family Geminiviridae, genus Begomovirus) significantly hamper crop production and threaten food security around the world. The frequent emergence of new begomovirus genotypes is facilitated by high mutation frequencies and the propensity to recombine and reassort. Homologous recombination has been especially implicated in the emergence of novel cassava mosaic begomovirus (CMB) genotypes, which cause cassava mosaic disease (CMD). Cassava (Manihot esculenta) is a staple food crop throughout Africa, and an important industrial crop in Asia, two continents where production is severely constrained by CMD. The CMD species complex is comprised of 11 bipartite begomovirus species with ample distribution throughout Africa and the Indian subcontinent. While recombination is regarded as a frequent occurrence for CMBs, a revised, systematic assessment of recombination and its impact on CMB phylogeny is currently lacking. We assembled datasets of all publicly available, full-length DNA-A (n=880) and DNA-B (n=369) nucleotide sequences from the 11 recognized CMB species. Phylogenetic networks and complementary recombination detection methods revealed extensive recombination among the CMB sequences. Six out of the eleven species have descended from unique interspecies recombination events. Estimates of recombination and mutation rates revealed that all species experience mutation more frequently than recombination, but measures of population divergence indicate that recombination is largely responsible for the genetic differences between species. Our results support that recombination has significantly impacted the CMB phylogeny and is driving speciation in the CMD species complex.

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