Phylogenetic diversity is a measure of biodiversity which incorporates phylogenetic difference between species. It is defined and calculated as "the sum of the lengths of all those branches that are members of the corresponding ", in which 'branch' is a segment of a cladogram, and the minimum spanning path is the minimum distance between the two nodes. This definition is distinct from earlier measures which attempted to incorporate phylogenetic diversity into , such as the measure of 'taxic diversity' introduced by Vane-Wright, Humphries, and William. The concept of phylogenetic diversity has been rapidly adopted in conservation planning, with programs such as the Zoological Society of London's EDGE of Existence programme focused on evolutionary distinct species. Similarly, the WWF's Global 200 also includes unusual evolutionary phenomena in their criteria for selecting target ecoregions. Some studies have indicated that alpha diversity is a good proxy for phylogenetic diversity, so suggesting that term has little use, but a study in the Cape Floristic Region showed that while phylogenetic and species/genus diversity are very strongly correlated (R2 = 0.77 and 0.96, respectively), using phylogenetic diversity led to selection of different conservation priorities than using species richness. It also demonstrated that PD led to greater preservation of 'feature diversity' than species richness alone. (Wikipedia).
Dogs vs Cats: The Diversity Paradox
To make our work paw-sible, join us on Patreon at http://patreon.com/MinuteEarth! Different dogs look incredibly different - but that doesn't mean they are necessarily more diverse. LEARN MORE ************** To learn more about this topic, start your googling with these keywords: phenot
From playlist Biology
Using phylogenetic trees to understand biology
This video introduces the terms synapomorphy, symplesiomorphy, and homoplasy which are critical for understanding which traits provide useful information about relationships and which types of data muddies the pattern. This video also introduces the terms monophyletic, paraphyletic, and po
From playlist TAMU: Bio 312 - Evolution | CosmoLearning Biology
What Is A Species? | Evolution | Biology | FuseSchool
Carl Linnaeus classified all living things into groups based upon their physical features. His system placed organisms with the most similar characteristics together in a group he called the “species”. A species is defined as all organisms that are able to breed with one another, and mos
From playlist BIOLOGY: Evolution
Diversity of life (1), broad overview of all life
This video introduces the overall phylogeny of life on Earth. It then provides a broad overview of the following groups: eubacteria, archaea, fungi, and green plants.
From playlist TAMU: Bio 312 - Evolution | CosmoLearning Biology
Are all coral reefs the same? Each regional ecosystem has its own assemblage of species and each contributes uniquely to global biodiversity. Explore why ecosystem diversity is important for conservation decisions. For more biodiversity tutorials, visit http://bit.ly/cas-khan.
From playlist Ecology | High school biology | Khan Academy
Michael Desai: Genetic diversity in the interference selection limit
Find this video and other talks given by worldwide mathematicians on CIRM's Audiovisual Mathematics Library: http://library.cirm-math.fr. And discover all its functionalities: - Chapter markers and keywords to watch the parts of your choice in the video - Videos enriched with abstracts, b
From playlist Probability and Statistics
Multiple loci (4), quantitative genetics.
This video looks at the field of "quantitative genetics" which is when we look at systems with many more than two loci with alleles that influence the trait we are considering. The approach is more statistical and the concept of heritability is reconsidered from this perspective.
From playlist TAMU: Bio 312 - Evolution | CosmoLearning Biology
Phylogeny and the Tree of Life
Alright, we've learned about how unicellular organisms came to be, how they became multicellular, and then from those how evolution by natural selection produced all the species in the world today. But there are so many! Millions and millions in fact. Which is most closely related to which
From playlist Biology/Genetics
Trevor Martin, Coordinated evolution of gene expression across 309 marine microbial species
On March 1, 2016, Mr. Martin delivered this talk at the annual CEHG symposium on Stanford campus. CEHG is Stanford's Center for Computational, Evolutionary and Human Genomics.
From playlist Stanford CEHG Speaker Playlist
Evolution, Biogeography and "Systems Ecology" in Microbial Eukaryote Taxa - H. Bik - 1/14/16
Bioinformatics Research Symposium Beckman Institute Auditorium Thursday, January 14, 2016
From playlist Bioinformatics Research Symposium
Lec 32 | MIT 7.014 Introductory Biology, Spring 2005
Molecular Evolution (Prof. Martin Polz, Guest Lecturer) View the complete course: http://ocw.mit.edu/7-014S05 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 7.014 Introductory Biology, Spring 2005
Angiosperm Diversity: Monocots and Eudicots
We've already introduced angiosperms in a previous tutorial, but there is an overwhelming diversity within the angiosperms that must be investigated. Let's take a look at all of the clades within the flowering plants, especially monocots and eudicots. Script by Ryan Helcoski Watch the wh
From playlist Botany
LS4A - Evidence of Common Ancestry and Diversity
In this video Paul Andersen describes several types of evidence for common ancestry. This evidence is contained in the fossils, embryos and molecules of living organisms. Even though life on our planet is incredibly diverse there are common threads that run through everything. This idea
From playlist Next Generation Science Standards
Principles of Evolution, Ecology and Behavior (EEB 122) Speciation is the process through which species diverge from each other and/or from a common ancestor. There are several definitions of species, most of which focus on reproductive isolation and/or phylogenetic similarities. This c
From playlist Evolution, Ecology and Behavior with Stephen C. Stearns
Collen: Tracking Global Biodiversity Change in Space and Time
Ben Collen explains the ways biodiversity loss has been monitored and discusses novel approaches.
From playlist Spatial Biodiversity Science and Conservation
BioSci 94: Organisms to Ecosystems. Lec. 7. Origins of Life, Bacteria & Archaea
UCI BioSci 94: Organisms to Ecosystems (Winter 2013) Lec 07. Organisms to Ecosystems -- Origins of Life, Bacteria & Archaea -- View the complete course: http://ocw.uci.edu/courses/biosci_94_organisms_to_ecosystems.html Instructor: Michael Clegg, Ph.D. License: Creative Commons BY-NC-SA Te
From playlist BioSci 94: Organisms to Ecosystems
6.4 - Cancer: Phylogenetic insights
"Evolutionary Medicine" Sinauer Associates (2015) is the textbook that supports these lectures. Instructors can request examination copies and sign up to download figures here: http://www.sinauer.com/catalog/medical/evolutionary-medicine.html
From playlist Evolution and Medicine (2015) with Stephen Stearns
Molecular Archaeology: Using Genomes to Reconstruct Two Billion Years by Mukund Thattai
ICTS at Ten ORGANIZERS: Rajesh Gopakumar and Spenta R. Wadia DATE: 04 January 2018 to 06 January 2018 VENUE: International Centre for Theoretical Sciences, Bengaluru This is the tenth year of ICTS-TIFR since it came into existence on 2nd August 2007. ICTS has now grown to have more tha
From playlist ICTS at Ten
Genetic variation, gene flow, and new species
What is the connection between genes and biodiversity? Learn how genes determine an individual's traits, how mutations can change those genes, and how sexual reproduction recombines genes. For more biodiversity tutorials, visit http://bit.ly/cas-khan.
From playlist Evolution | High School Biology | Khan Academy