Exemplars of Human Impact Brook Milligan Department of Biology New - - PowerPoint PPT Presentation

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exemplars of human impact

Exemplars of Human Impact Brook Milligan Department of Biology New - - PowerPoint PPT Presentation

Oct 12, 2023 292 likes •543 views

Exemplars of Human Impact Brook Milligan Department of Biology New Mexico State University Las Cruces, New Mexico 88003 brook@nmsu.edu Fall 2009 Brook Milligan Exemplars of Human Impact Biodiversity and Human Impacts Understanding global

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Exemplars of Human Impact

Brook Milligan

Department of Biology New Mexico State University Las Cruces, New Mexico 88003 brook@nmsu.edu

Fall 2009

Brook Milligan Exemplars of Human Impact

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Biodiversity and Human Impacts

Understanding global patterns of biodiversity requires knowledge of robust ecological patterns. What if extant patterns do not reflect historical ones? What are some examples of impact associated with human

ccupation?

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Expansion of Humans in the Pacific

Initiated: prior to 3,000 B.P. in China/Taiwan 3,000 BP: Bismarck Archipelago 2,000 BP: Fiji, Tonga, Samoa 1,500–1,700 BP: Rapa Nui (Easter Island) 1,500 BP: Hawai’i 800 BP: Aoteroa (New Zealand)

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World Oceans

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Pacific Ocean

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Melanesia

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Melanesia

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Human Impacts in Polynesia

Hawai’i 60 species known only from fossils 20–25 species extinct during last 200 years Rapa Nui (Easter Island) Prehistoric Modern Seabirds 22 extinct: 1 extirpated: 12–15 breeding offshore: 8–10 breeding: 1 Land birds 6 E: 6 Ecological relationships Foraging guilds: large frugivore decline Foraging height: ground birds extinct

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New Zealand: giant moas

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Moai

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Anakena

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Tukuturi: Kneeling Moai

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Rano Raraku

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Formation of Volcanic Islands

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Distribution of Volcanic Islands and Seamounts

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Rapa Nui

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Garden

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Fossil Palm Nuts

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Lava Casts of Palm Trunks

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Rano Kau Crater

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Rano Kau Crater Pollen Profiles

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Changes in Vegetation Patterns

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Projected Scenarios

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Resource Depletion

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