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Found 16 resources for the concept: Speciation is the splitting of one ancestral lineage into two or more descendent lineages

imageChimpanzee Droppings Lead Scientists to Evolutionary Discovery
Simian Immunodeficiency Virus (SIV) is thought to be a precursor to HIV. This multi-part case study explores changes in SIV in different chimpanzee populations and how researchers use this information to test hypotheses about the origins of HIV.

Audience: 13-16

Source: Kosal, Erica F.

Resource type: Classroom activity

imageEvo in the news: Speciation in real time
We often think of speciation as a slow process—so slow that we can’t really observe it going on around us. This news brief from Febrary 2010 describes two examples which demonstrate that, at least occasionally, important steps toward speciation can be observed in less than 50 years.

Audience: 13-16

Source: UC Museum of Paleontology

Resource type: Evo in the News article

imageEvo in the news: Where did all of Madagascar's species come from?
Recently, political unrest in Madagascar has threatened to set back the island’s expanding conservation efforts, and criminals have taken advantage of the instability, looting protected forests for rare wood. This news story from October 2009 turns back the clock to consider the biogeographic processes that made Madagascar into a biodiversity hotspot in the first place.

Audience: 13-16

Source: UC Museum of Paleontology

Resource type: Evo in the News article

imageEvo in the news: Evolving conservation strategies
This news brief, from June 2007, explains how biologists are using evolutionary theory to protect the biodiversity that exists today and that may evolve tomorrow.

Audience: 13-16

Source: UC Museum of Paleontology

Resource type: Evo in the News article

imageEvo in the news: Happy 200th, Darwin!
This news brief, from February 2009, celebrates Darwin's bicentennial by examining what we've learned about the evolution of the Galapagos finches since Darwin's time.

Audience: 13-16

Source: UC Museum of Paleontology

Resource type: Evo in the News article

imageEvo in the news: Sex, speciation, and fishy physics
More than 500 species of cichlid fish inhabit Africa's Lake Victoria. This news brief from March 2009 explains new research suggesting that the physics of light may have played an important role in cichlid diversification and in the recent drop in their diversity.

Audience: 13-16

Source: UC Museum of Paleontology

Resource type: Evo in the News article

imageIsland biogeography and evolution: Solving a phylogenetic puzzle using molecular genetics
Students focus on the evolution of three species of lizards using real data sets – geographical and geological data, then morphology, and finally molecular data – to determine possible phylogenetic explanations.

Audience: 13-16

Source: Filson, R.P.

Resource type: Lab activity

imageClassification and Evolution
Students construct an evolutionary tree of imaginary animals (Caminalcules) to illustrate how modern classification schemes attempt to reflect evolutionary history.

Audience: 13-16

Source: Gendron, Robert

Resource type: Lab activity

imageA Step in Speciation
Students compare different subspecies of a California salamander on a grid map of California to focus on patterns of their distribution, their likely evolutionary relationships, and probable sequence of formation from the ancestral salamander.

Audience: 13-16

Source: ENSI

Resource type: Lab activity

imageA closer look at a classic ring species: The work of Tom Devitt
The Ensatina salamander has been extensively investigated because it is a ring species — a species that demonstrates how geography and the gradual accumulation of genetic differences factor into the process of speciation. Biologist Tom Devitt continues the more than 50 years of Ensatina research by applying new genetic techniques and asking new questions about this classic evolutionary example.

Audience: 13-16

Source: UC Museum of Paleontology

Resource type: Research profile

imageParsimonious explanations for punctuated patterns
Punctuated equilibrium is sometimes erroneously cited as evidence that evolutionary biology still hasn't figured out how evolution works. In fact nothing could be further from the truth. Punctuated equilibrium builds on (not tears down!) established evolutionary theory. Find out how the process works.
This article appears at SpringerLink.

Audience: 13-16

Source: Evolution: Education and Outreach

Resource type: Article

imageWebcast: Selection in action
In lecture two of a four part series, evolutionary biologist David Kingsley discusses how just a few small genetic changes can have a big effect on morphology, using examples from maize, dog breeding, and stickleback fish.
This lecture is available from Howard Hughes' BioInteractive website.

Audience: 13-16

Source: Howard Hughes Medical Institute

Resource type: Video Lecture

image¡Feliz cumpleaños número 200, Darwin!
Este 12 de febrero se cumplirían 200 años del nacimiento de Charles Darwin, y todo el mundo esta invitado a la fiesta. Numerosos grupos alrededor del mundo — desde niños en las escuelas primarias, hasta museos e iglesias — celebraran la ciencia de la evolución con conferencias públicas, clases, obras teatrales, exhibiciones artísticas y muchísimas galletas con forma de tortugas. 'Evolución en las noticias' de este mes contribuye a la celebración mediante la revisión de un tema cercano y querido por Darwin: los pinzones de Galápagos...

Audience: 13-16

Source: UC Museum of Paleontology

Resource type: Evo in the News article

imageSexo, especiación y física subacuática
Evolución en las noticias relata una reciente historia que señala como comprender física básica puede revelar como la evolución esta ocurriendo hoy — en especial, como la física de la luz tiene influencia sobre la selección sexual, especiación y el colapso de la biodiversidad, producto de la polución causada por los humanos...

Audience: 13-16

Source: UC Museum of Paleontology

Resource type: Evo in the News article

image¿De donde vienen todas las especies de Madagascar?
Continuando la celebración del tema de Octubre en el Año de la Ciencia, las ciencias de la tierra y el planeta Tierra, la historia de este mes se centra en cómo la geografía y la geología han moldeado la evolución de la vida en uno de los lugares más singulares de la Tierra. Madagascar, la cuarta isla más grande del mundo, se encuentra en el Océano Índico a varios cientos de kilómetros de la costa sureste de África y constituye el hogar de una notable variedad de especies vegetales y animales, incluido el aye aye, la fossa, el camaleón y el árbol baobab...

Audience: 13-16

Source: UC Museum of Paleontology

Resource type: Evo in the News article

imageEspeciación en tiempo real
Generalmente, pensamos en la especiación como un proceso lento. Toda la evidencia disponible sostiene la idea de que diferentes especies evolucionaron desde ancestros comunes, y sin embargo, nuevas especies no aparecen a nuestro alrededor diariamente. Para muchos biólogos, esto implica que la especiación ocurre tan lentamente que es difícil observarla en escalas de tiempo humanas. Sin embargo, nuevas investigaciones sugieren que la especiación podría ser más fácil de observar de lo que pensamos.

Audience: 13-16

Source: UC Museum of Paleontology

Resource type: Evo in the News article

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