L1 - disease vectors The Advancement of Science-New...

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NATS 1840 – Lecture 1 – Anthropomorphic Extinctions in the Late Quarternary Human Impact on the Environment - Green space, pollution, extinction - Causes of extinction, removal of habitat, predators - Evidence for extinction, evidence for causes Martin’s Thesis Anthropogenic Sources of Extinction - Many large mammals became extinct in the last 50 000 years ( “near time”, Quarternary period) - Approximately half of 200 genera of large mammals (100 lb +) lost - Almost all extinctions of wild animals in last 50,000 anthropogenic - Extinction not only recent, not solely due to advanced science or technology - Human migration to new continents, islands, large and small mammals and birds - “Overkill” thesis, excessive predation, introduction of predators, competitors and
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Unformatted text preview: disease vectors The Advancement of Science-New theories, new technologies, new evidence -Radio-carbon dating, precise estimation of extinction dates -Scientific work and new evidence-Radio-carbon dating within a few hundred years, sudden or gradual extinction-Extinctions correlate with spread of humanity-Correlation and cause Competing Explanations-Extinctions and sudden climatic changes-No direct evidence for human hunting 50,000 years ago-Africa and Eurasia, co-evolution and fewer extinctions -No evidence for sudden catastrophe -Extinctions in the late Quarternary Conclusions-Responsibility of ancient peoples for extinctions, global involvement-Knowledge of extinctions-Realistic idea of human impact, sympathy with large mammals...
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This note was uploaded on 09/30/2011 for the course NATS 1800 taught by Professor Jfdksoa during the Spring '11 term at York University.

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