How is Biodiversity Distributed? Brook Milligan Department of Biology New Mexico State University Las Cruces, New Mexico 88003 brook@nmsu.edu Fall 2009 Brook Milligan How is Biodiversity Distributed?
Goal: Understanding Distribution of Biodiversity If biodiversity can be quantified, . . . How many known species are there on Earth? How many actual species are there on Earth? How are the species distributed across taxa? How is biodiversity distributed across the Earth? Brook Milligan How is Biodiversity Distributed?
Known Species on Earth Brook Milligan How is Biodiversity Distributed?
Known Species on Earth Total: 1 . 5–2 × 10 6 species Brook Milligan How is Biodiversity Distributed?
Known Species on Earth Total: 1 . 5–2 × 10 6 species Insecta: 751 × 10 3 species Planta: 250,000 species Aves: 9,000 species Mammalia: 4,000 species Brook Milligan How is Biodiversity Distributed?
Species Scape Brook Milligan How is Biodiversity Distributed?
So, how many species are there on Earth? Highly uncertain, especially in some taxonomic groups How can we find out? Requirements for effective estimation Brook Milligan How is Biodiversity Distributed?
Brook Milligan How is Biodiversity Distributed?
Brook Milligan How is Biodiversity Distributed?
Brook Milligan How is Biodiversity Distributed?
Brook Milligan How is Biodiversity Distributed?
Brook Milligan How is Biodiversity Distributed?
Regions of High Diversity Tropical diversity tropical rain forests coral reefs large tropical lakes deep sea Temperate diversity Plant diversity: Mediterranean climate regions Mediterranean Basin California central Chile Cape region of South Africa Brook Milligan How is Biodiversity Distributed?
Factors Influencing Diversity Climate and the environment Topography, geological age, habitat size Latitude Taxon Brook Milligan How is Biodiversity Distributed?
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