1-21-11 Organizing diversity

1-21-11 Organizing diversity -...

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1/21/2011 1 Phylogenetics: Organizing diversity 1 Species Diversity Today… Named and described, ~ 1.8 million Vertebrates ~62,000 Insects ~1,000,000 Other invertebrates ~300,000 Plants ~320,000 Mushrooms ~32,000 9,850 Bacteria 400 Archaea 2 Estimates of 10 100 million more eukaroyte species alive today Estimates of up to a billion Prokaryotic “species”, but still have to work out how to group Prokaryotes Project IBISCA: density of arthropods at different heights in a tropical forest Taxonomic Hierarchy, Linnean classification system: Domain: Kingdom Phylum Class Order Family Genus Species Eukarya Animalia Felidae Panthera Panthera pardus Eukarya Asteraceae Helianthus Helianthus annuus Plantae Does hierarchical system reflect evolutionary history? 3
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1/21/2011 2 Species Canis lupus Pantherap ardus Taxidea taxus Lutra lutra Canis latrans Order Family Genus Carnivora Felidae Mustelidae Canidae Canis Lutra Taxidea Panthera Sometimes YES! 4 5 But not always: Viguiera porteri or Confederate daisy Recently reclassified as Helianthus porteri Rare sunflower found on granite outcrops in GA Why study diversity in an evolutionary context, i.e. “The Tree of Life”? Basic information conveyed in a phylogentic tree Phylogenies provide current context for many biological questions relevant for society (video clip) Need to understanding traits that go into making a phylogeny 6 http://tolweb.org/tree/
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1/21/2011 3 7 4 bya Bacteria
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This document was uploaded on 08/10/2011.

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1-21-11 Organizing diversity -...

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