ENVS 167 Lecture Notes - Lecture 3: Homo Sapiens, Keystone Species, Land Management

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Homo-sapiens: main traits and their long-term environmental consequences. Culture replaces evolution as main (but not only) driver of change in our behavior. Over relatively short period, humans undergo physiological and cultural changes to adapt to vastly different environments. No other mammalian species we know of has ever shown such a rapid rate of diffusion. Sophisticated tool use (compared to other species) provided access to numerus resources. A species that plays a critical role in maintaining the structure of an ecological community and whose impact on the community is greater than would be expected based on its relative abundance or total biomass. In general, homo sapiens could be considered a keystone species. Domestication: a new relationship between humans and various animals and plants. Not an abrupt change, but a gradual development. Dna evidence suggests dogs and wolves split into different species about 100,000 years ago.

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