BIOL 111 Study Guide - Final Guide: Vancouver Island Marmot, Haida Gwaii, Greater Prairie Chicken

• School: Queen's University
• Department: Biology
• Course: BIOL 111
• Professor: Peter T Boag

Document Summary

Species extinction: there are three levels of species extinction: Local extinction occurs when a species is extinct in one area, but still found elsewhere. Ecological extinction is when few members are left, that they can"t play their ecological roles. Biological extinction is the permanent extinction of a whole species everywhere on earth: canada has lost 15 species to extinction. The last of these five has gone extinct in 1935. Passenger pigeons were probably the most common bird in the world. Great auks were penguin-like birds that were slaughtered from their meat and fat. Labrador ducks lived by labrador; they were hunted from their meat, eggs, and feathers. Sea minks lived off the maritime provinces; they were fished for their reddish pelts. The extinction of a species typically takes such a long time that it is not easy to document. We have identified only about 1. 5 million of the world"s estimated 5-100 million species.