Mark Davis argues that non-natives rarely threaten natives with extinction. Davis would further say that: Non-natives may cause local increases in abundance of native species. None of the thousands of native plant species in North America has ever gone totally extinct due to a non-native species. This is a problem everywhere except on islands and in lakes. Ecologists rarely make unjustified statements about broad extinction threats due to non- native species
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When European settlers arrived in the Americas, historians estimate that there were over 10 million Native Americans living there. By 1900, their estimated population was under 300,000. Native Americans were subjected to many different forms of violence, all with the intention of destroying the community. In the late 1800s, blankets from smallpox patients were distributed to Native Americans in order to spread disease. There were several wars, and violence was encouraged. For example, European settlers were paid for each Penobscot person they killed (extracted from here). Based on the text above and evolutionary thinking, answer the questions below: a) Name the evolutionary process associated with the genocide of Native American People and describe the expected long-lasting consequences for their gene pool. (2 pts) b) Design a study to look for genetic evidence of genocide in Native American populations. (2 pts)
Adi S.
Researchers and the public have long been aware of the possible disastrous consequences of introducing non-native species into ecosystems. Why do populations of non-native introductions like the glassy-winged sharpshooter, kudzu vine, crested wheatgrass or zebra mussels increase in numbers so quickly in comparison to their growth in the areas from which they come? 1- Changed physical conditions, like more fertile soil, additional water or warmer temperatures exist, thereby allowing them to grow more rapidly. 2- Competitors from their native habitat are not present to impede access to resources, and predators, parasites or grazers are not present to control growth, thereby allowing them to grow more rapidly. 3- Increased competition in the new habitat forces them to be extra diligent and increase their biotic potential, thereby allowing them to grow more rapidly.
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Myth of Extinction: "The best way to ensure an extinct title for a Native land claim is to have an extinct Native tribe – even if the people themselves are still persisting." Explain the semantic twisting of the concept of extinction. What would/does recognition mean for native groups? Some groups don't want to be "recognized," so what might be the drawbacks or benefits for them? How could recognition of particular native groups affect non-native land titles or the general public?
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