Although only about half of the Lucilia species listed as valid by Aubertin (1933) were included, these results strongly suggest that L. sericata and L. cuprina are indeed sister species. All of the Bayesian inference analyses (Figs 1–3) indicate that L. sericata and L. cuprina are sister taxa with strong support from the nuclear gene (28S & Per) and total data (28S, Per & COI) trees and weaker support from the COI gene alone. Lucilia cuprina is paraphyletic (Fig. 2) with respect to L. sericata in the mitochondrial gene (COI) tree, as has been shown previously (using the same sequences but weaker auxiliary taxon sampling) to be the result of introgressive hybridisation between these two species (Williams & Villet, 2013). In another study, the nuclear gene elongation factor-1 alpha (EF-1α) did not recover L. sericata and L. cuprina as sister-species (McDonagh & Stevens, 2011), but the clade containing L. sericata was poorly resolved and thus the conclusion was not well supported. In the same study, the 28S and COI gene trees both recovered L. sericata and L. cuprina as sister species with strong support (McDonagh & Stevens, 2011).
The Bayesian inference analysis of the COI barcode sequences included 45 L. sericata sequences and 42 L. cuprina sequences. Despite the number of sequences, L. sericata was poorly resolved, which explains the poor node support (0.61) of the L. sericata + L. cuprina + L. taiyuanensis clade. Lucilia taiyuanensis is represented by only one sequence
The WC was only found in the B6 to the C10 indexes, which showed the middle stage. Also, the cactus found only in indexes C7 to D10 represented the late stage, or the “climax community”. We also found the CJ appearing in the early middle, showing the zone that it occurs in. The tall green leaf plant was found only during the early B stage, therefore, it must only survive in dry, sandy soil. In addition, we found some horse tails only in the A index, this represents a primary succession, whereas in index D, it may have been more of a secondary succession due to the soil being wetter and
The classification of C. townsendii becomes more intricate at the family classification. Classed into family Vespertilionidae, Townsend’s bat follows the family characteristics of a simple face that lacks a noseleaf. Furthermore, Townsend’s bat falls into the genus Corynorhinus, which is characterized by lump noses and unique, easily identifiable long ears. Corynorhinus harbors only three unique species of bats: the Townsend’s big-eared bat, the Mexican big-eared bat, and Rafinesque’s big-eared bat. The major distinguishing characteristics amongst these species are their coats and habitats. All three species natively inhabit North America, but their climate and habitat regions vary. For example, C.mexicanus (Mexican big-eared bat) resides primarily in the high, humid regions of Mexico while C. townsendii prefers a more moderate climate and a rocky habitat. Moreover, C. townsendii is easily
By using DNA sequencing software and using comparative DNA alignment programs, scientists can piece together where the differences and similarities align and the percentage of identical DNA between two species. Another method of classifying these gene-swapping organisms is to alter the method of vertical genomics and shift to a new form of lateral genomics (Koonin et al. 2001). A method using vertical, linear genomics alone will not provide enough resources to clearly assign an organism to a taxonomic group. Also, scientists can look at gene loss over time as a method to group these organisms (Koonin et al. 2001). If scientists would rather stick with similarities to define a taxonomic group, the use of genomic instruments can provide a better picture of which genes are highly conserved between organisms of the same group (Doolittle 1999). Researchers have begun to employ this method as the means for best completing a phylogenetic tree. Using alignments of single copy genes conserved in the genome allows for scientists to achieve that vertical pattern of phylogeny that can be lost when focusing on the amount of transferred genes between groups (Lang et al. 2013).
16. Now, drag the tree window back to where you had selected Arthropoda in step 14. This time, click through these taxa in this sequence:
As seen with Anolis, single species of organisms have the ability to undergo adaptive radiation and become new species by filling niches in a given environment. This is prevalent not only in Anolis, but other model organisms as well, such as finches, sticklebacks, and cichlids. All of these organisms have gone through the similar mechanisms and processes to evolve into different species. Alike to Anolis, they have gone through reproductive isolation, adaptation, and convergent evolution. Due to a poor fossil record of Anolis, the other model organisms may give better outlook on how they have diverged overtime. Further investigations on all of these organisms and their evolutionary mechanisms would not only give better a better idea of ecological speciation, but more comprehension on the origin of all
World War II was a war that proved to the world the awesome power of the United States. Many events led up to the U.S. involvement in the war, topped off by the Japanese attack of Pearl Harbor. Many great people contributed to leading the United State to victory in the war. They include General Douglas MacArthur, General Dwight Eisenhower, and President Franklin Delano Roosevelt. World War II also consisted of many major events including Operation Overlord and the U.S. bombings of Hiroshima and Nagasaki. Overall the United States played a major role in World War II and displayed their power through strong generals and their initiative and strong leadership in major
Additionally, I. longirostris was genetically different among and across rivers. This first insights about the population genetic structure of I. longirostris is crucial for monitoring the genetic diversity, management and conservation of its populations and complementing the genetic studies in Prochilodontidae.
Systematic classification of brown trout is quite complex and has many nomenclatural. Systematic position of Genus Salmo has not been fully clarified due to the disagreement about whether or not consider some of the Brown trout subspecies or ecotypes as a different species (Bagliniere and Maisse, 1999). The recognition that morphology of brown trout could change under different environmental conditions led some of the researchers to group all of these forms into a single polytypic species called Salmo trutta (Ferguson, 2004). Meanwhile multiple species derived from Salmo trutta macrostigma (Duméril, 1858) were renamed in Turkey based on their morphological appearance (Turan et al., 2010, 2011, 2012, 2014). Also S. t. labrax were also renamed
It is important to resolve taxonomic uncertainty of species in conservation programs as resources may be wasted on conserving populations of a common species, distinct species may be hybridized and undescribed threatened species may not be protected.
In the case of ring species, natural selection and sexual selection each play a role in the divergence of ring species. Selective pressures allowed one phenotype to survive better than others in a certain area; sexual selection could cause divergence because organisms choose mates based on phenotypes. In the case of salamanders, natural selection affected divergence because organisms with certain coloration survived better in coastal or inland environments. In warblers, sexual selection and natural selection seem to play a part in the divergence of the ring species, as forest density and migration distance is variable and affects survival of the species. Molecular and morphological evidence can be used to support multiple species by showing
Phylogenetics is the study of the evolutionary history and relationships among individuals or groups of organisms. It can be used in both molecular and morphological data in order to classify organisms. The relationships among the brachyuran families are poorly understood due to the high morphological diversity of the group (Tsang et al., 2014). Brachyuran crabs have undergone extensive radiation and are extremely diverse both morphologically and ecologically (Spears et al., 1992).
When discussing distinct species, what frequently appears is the factor of reproduction, more accurately reproductive isolation. The ability to interbreed with individuals in their species and produced infertile offspring when mating with those from other closely related groups has been the “go-to” qualification (Cawley, 1). However, there are instances where different species are able to produce viable progeny. In fact, “25% of plant species and 10% of all animal species hybridize successfully with at least one other species” (Hendry, 1). Consequently, the question
The researchers used shot-gun sequencing which is a technique that uses smaller fragments of deoxyribonucleic acid (DNA) sequences that are reassembled into one sequence by looking for regions of overlap. All of the 3.6M reads, were first trimmed for 99% accuracy for all known organisms then characterized with Sequence-based
The modern concept of species is difficult to apply to asexual organisms, fossil organisms, populations at an intermediate stage of divergence, and allopatric populations. There is no way to check interbreeding in extinct fossil organism. We cannot determine interbreeding in dinosaur fossils. We cannot acquire breeding information from asexual species, such as bacteria that use binary fission. Populations in an intermediate
Purpose of Bergy’s Manual: based on ribosomal RNA sequences, which presumably reflect phylogenetic (evolutionary) relationships. Used for the identification of prokaryotes. 2nd edition on classification of prokaryotes.