Future biodiversity and ability to develop new crop strains requires existing wild plant species as sources of genetic diversity. What is the aesthetic and recreational importance of wild species source of beauty, wonder, joy, and recreational pleasure. Why is it ethicallyl important to preserve wild species bioethics -ethical stance based on view that each species has intrinsic value unrelated to its usefulnes to humans. 6 reason why we should all value the biodiversity of the earth. Three levels of extinction local extinction -when a species is no longer found in an area it once inhabitited by still can be found elsewhere in world.
Extinction is a natural process, occurs at some natural background level.
Based on fossil record, average span of a species is about 4 million years. Such rapid extinction cannot be balanced by specieation because it takes thousands of generations for new species to evolve. We may just make ourselves extinct. Below critical size, small populations are vulnerable extinction by sing catastrophic event. International Congress of Plant Pathology.