01:119:115 Lecture Notes - Lecture 28: Global Warming, Dhow, Extinction Vortex
13 Mar 2016
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Document Summary
Scientists have named and described 1. 8 million species. Estimates 10-100 million species exist on earth. Humans are rapidly pushing many species toward extinction. Conservation biology- seeks to preserve life, integrating several fields to preserve biological diversity. The local extinction of one species can have a negative impact on other species in an ecosystem. Flying foxes (bats) are important pollinators & seed dispersers in the. Pacific islands: benefits of species & genetic diversity. Species related to agricultural crops can have important genetic qualities. In the us, 25% of prescriptions contain substances originally derived from plants. The loss of species also means loss of unique genes & genetic diversity. The enormous genetic diversity of organisms has potential for great human benefit: ecosystem services- encompasses all the processes through which natural ecosystems & their species help sustain human life. Introduced species- are those that humans move from native locations to new geographic regions.
