How is Biodiversity Distributed? Brook Milligan Department of - - PowerPoint PPT Presentation

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Jul 21, 2023 277 likes •424 views

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

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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?

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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?

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Known Species on Earth

Brook Milligan How is Biodiversity Distributed?

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Known Species on Earth

Total: 1.5–2 × 106 species

Brook Milligan How is Biodiversity Distributed?

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Known Species on Earth

Total: 1.5–2 × 106 species Insecta: 751 × 103 species Planta: 250,000 species Aves: 9,000 species Mammalia: 4,000 species

Brook Milligan How is Biodiversity Distributed?

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Species Scape

Brook Milligan How is Biodiversity Distributed?

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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?

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Brook Milligan How is Biodiversity Distributed?

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Brook Milligan How is Biodiversity Distributed?

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Brook Milligan How is Biodiversity Distributed?

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Brook Milligan How is Biodiversity Distributed?

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Brook Milligan How is Biodiversity Distributed?

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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?

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Factors Influencing Diversity

Climate and the environment Topography, geological age, habitat size Latitude Taxon

Brook Milligan How is Biodiversity Distributed?