the Mammoths: Ice Age Extinctions and the Rewilding of America, University of California Press, 2005, Prologue and Chapter 2 Summary The overkill hypothesis stresses the fact that people were the main technicians behind the late pleistocene extinction of fauna in Northern Eurasia and North and South America. Paul Martin of the University of Arizona and others see a subsequent and spontaneous connection between the presence of people and the vanishing of numerous species of large mammals. According
safeguading of endangered species is unnatural and poses many drawbacks and provides three reasons of support. However, the professor explains that the extinction of the species should be prevented whenever possible because it has a bad consequence to the environment and refutes each of the authors' reasons. First, the reading states that the extinction of the dinosaur did not result in lasting harm to life on earth. The professor opposes this point by saying that after the extinction of the dinosaur, a
time by humans. Humans also can be the cause of extinction hunting, destroying an animal's home, pollution, and introduction of alien species are just a few ways that we can cause extinction of an animal. Extinction can also occur naturally when disease is spread, or an invasive species takes over. I believe that we should not bring back extinct creatures for three distinct reasons. De- extinction could hinder conservation efforts,de-extinction attempts have failed, and finally bringing back
kangaroo. They were marsupials but behaved more like wolves than marsupials (which makes them an excellent example of convergent evolution). They became extinct in Australia and New Guinea because of their incompetence against the dingoes, an invasive species brought by the aboriginal men. Nevertheless, some were left in Tasmania as the dingoes did not reach there, but died out soon after Europeans arrived there. Similar story includes the dodo’s tale which is illustrated perfectly by Richard Dawkins in
The debate of whether humans as a species are destroying their planet and violently pushing life to extinction has only intensified in recent years. But evidence has proved what we don’t want to hear time and time again – humans, and our actions (direct and indirect) are heavily involved in the extinction of flora and fauna species across the globe. We carelessly dump enormous amounts of c02 into our atmosphere, leading to ocean acidification and global warming that kill millions of animals and plants
“paleontologists characterize mass extinctions as times when Earth loses more than three-quarters of its species in geologically short interval…” (Barnosky). Since the life on Earth came to existence it has gone through multiple mass extinctions, five to be exact. Throughout these extinctions, there has been the loss of millions of species that will never come back into existence. When the term mass extinction is heard the first thought that most come to mind would be the extinction of dinosaurs, and how it
Potential Effects of the Next Extinction When the 6th Mass Extinction does occur, the effects will be tremendous. Unlike the other extinctions, it is predicted that the changes associated with this extinction will not only create a new epoch in history, but also shape the Earth in the way microbes evolved into multicellular organisms did (Hance, 2015). The effects, however, will be somewhat similar to past extinctions. One predicted effect of the 6th Mass Extinction is the availability of empty
megafaunal mass extinction took place. It’s still debated whether humans are to blame for this, since this megafaunal extinction happened after the arrival of humans or if climate change is entirely to blame. Fossil evidence has been of great help in finding what factors might’ve caused this extinction. This mass extinction that took place is related to the Anthropocene because if humans were the main cause, humans need to be more careful now because their actions may lead to more extinctions. The observations
Scientists estimate that 150-200 living species become extinct every 24 hours. The average human might not consider the significance of these dying species, but that may prove to be an issue in the near future. Living species, as Environmental Specialist Michael Marshall, states, provide “ecosystem services”. Some of these services are obvious, such as the meat that humans consume or the oxygen used to breathe. Imagine the world without any meat, and the widespread food shortages that would result
Extinctions and Radiations W 1, A 3 Bio 1021 By Roxanne Fortune South University Submitted: November, 16th, 2016 The common pattern of alternating extinctions and radiations has been done through biodiversity studies which studies the different organisms of species living on earth and where they live. In Stilwell (2003) journal, “Palaeocene faunas are characterized by a perceived rapid evolutionary radiation involving many new taxa at both genus and species level.” Stilwell stated Molluscs