Throughout the decades, biologists and paleobiologists investigated on the presence of the current living species and they found extinction of species, which this can be a supporting evidence of the sixth mass extinction in terms of species extinction as stated in definition. There are reports of extinct species such as the Dodo Birds, Falkland Island wolves, Caribbean Monk Seal, which faced threats such as killing for skin and oil, over-hunting of the animal resources and removal of land and habitats due to human activities (IUCN, 2001). The number of extinct species is keep growing throughout the centuries.
At present, as categorized by the International Union for Conservation of Nature (IUCN), there are 12% of all known birds, 30% of all known amphibians and 21% of all known mammals are regarded as at risk of extinction—Threatened (IUCN, 2001), including Kiwi Birds, Polar Bears and Chinese White Dolphins. These threatened species—mammals, reptiles, amphibians or even plants, are scattered over the world, mostly in the tropics, South America and Sub-Saharan Africa, which regarded as t...
... middle of paper ...
...estimated 96% of species (Barnosky, A. D., 2011).
Allaby, M. (ed) (2013), A Dictionary of Geology & Earth Sciences, 4th Edition, Oxford: Oxford University Press
Barnosky, A.D.; Matzke, N.; Tomiya, S.; Wogan, G. O. U.; Swartz, B; Quental, T. B; Marshall, C.; McGuire, J. L.; Lindsey, E. L.; Maguire, K. C; Mersey, B.; Ferrer, E. A.. (2011), Has the Earth’s sixth mass extinction already arrived? , Nature, [online], Vol 471: 51-57
Feulner, G. (2009), Climate Modelling of Mass-Extinction Events: Review, Int. J. Astrobiology, 8 :207-212.
Jenkins, M. (2003), Prospect for Biodiversity, Science, 302: 1175-1177
Unknown (2003), Stage set for sixth mass extinction of animals, Science, 331:
Haamble, C; Henderson. M. R (2011), Extinction rates, extinction-prone habitats, and indicator groups in Britain and at large scales, Biological Conservation, 144: 713-721
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- As titled: Are We On The Cusp Of The Sixth Mass Extinction Event. Yes, we are indeed, as we, here defined as all the lives on the Earth at the moment. Mass extinction is times when the Earth loses more than three-quarters of its species in a geologically short interval (Barnosky et al., 2011). In addition, according to the Oxford Dictionary of Geology and Earth Sciences edited by Michael Allaby (2013), mass extinction is defined as the Earth has been taken place environmental catastrophe, removes many groups from environment from record and not replaced, and ecosystems collapse.... [tags: environmental catastrophe, Geology]
608 words (1.7 pages)
- ... 70 million years later, we have more complex life, which has moved out of the ocean making use of the land. The Late Devonian extinction is not a single event but a myriad of smaller scale extinctions such as the Kellwasser event, and the Hangenberg event that are combined to create the entirety of the major extinction event. The third mass extinction happened approximately 245 mya and is referred to as the Permian–Triassic extinction event. “More than half of the families of living things died out, and as many as 90 to 96 percent of the planet's marine species were lost.... [tags: history and evolution of Earth]
718 words (2.1 pages)
- Earth Faces a Sixth Mass Extinction Scientists in Great Britain have been studying the distribution of birds, butterflies and plants for the past 40 years and the results from these studies suggest that the Earth is heading towards another mass extinction, and this one may have its roots in human activity. Within the four billion years that Earth has been around, it has already experienced five mass extinctions. The most recent, and most well known occurred 65 million years ago and caused the extinction of the dinosaurs.... [tags: Exploratory Essays Research Papers]
1252 words (3.6 pages)
- Cretaceous Extinction Event Causes, Evidence, and Effects on Biodiversity The most significant event of the Cretaceous era came at its end. Nearly 65 million years ago, the second most severe mass extinction in earth’s history occurred. This resulted in the loss of around 80% of species living at the time. Though nowhere near as severe as the end-Permian mass extinction, the end-Cretaceous extinction is the most well known mass extinction event. This is due to the violent event that caused it the extinction, as well as the chapter of earth’s history that it closed: the Dinosaurs.... [tags: mass extinction, dinosaur, asteriord]
1325 words (3.8 pages)
- The Sixth Extinction, a novel written by Elizabeth Kolbert, describes that the planet has been through five major extinctions. The book also makes the argument that it is currently in the midst of a sixth. The cause of this most recent extinction, according to the author and her findings in this book, is humans. Though she does not come right out and say that mankind is responsible for this phenomenon, the point becomes clear as you read along chapter to chapter. Kolbert proves this point by writing about a specific instance in each chapter in which a species is going extinct or is already extinct due to human impact.... [tags: Carbon dioxide, PH, Carbon, Marine biology]
1206 words (3.4 pages)
- I came into this class under the impression that I already wrote well enough and wouldn’t need to improve. However, as I progressed through the semester I learned that there is always room to grow. The first paper I produced was not at the level I was hoping but after I actively decided to improve my writing my papers became much better. Looking back on my work in the class I wonder how much my writing has changed and where I still have room to improve. Without evaluating my work I can’t hope to become any better.... [tags: Writing, Better, Improve, Paper]
1039 words (3 pages)
- Humans are very quickly dominating the globe. Today, the human population is around 7 billion people. Humans are populating at a rate of almost 220,000 per day. Humans are rapidly heading towards Earth’s carrying capacity. Earth has gone through five fully major extinctions before. We currently are in the process of Earth’s sixth mass extinction. This mass extinction is closely related in severity to the extinction of the dinosaurs. Earth’s extinctions are broken into three different areas. The first area was the large number of animals caught by hunter-gathers.... [tags: World population, Overpopulation, Human]
1827 words (5.2 pages)
- Wildlife has been living alongside man for as long as our species has been a part of this world, and the wildlife has even been here longer. You’d think that with man and animal coexisting in each other’s presence we’d respect the wild species that we have now a lot more than we do. Many people, whether they’re aware or not, are slaughtering animals all the way to extinction, and there are definitely more ways than one that humans are partaking in the extinction of endangered animals. We have to clean up our act before it’s too late for these animals, including us.... [tags: Extinction, Endangered species, Plant]
1257 words (3.6 pages)
- ABSTRACT Several mass extinctions have occurred during the Earth’s history. The Cretaceous – Tertiary Boundary (K-T) Extinction caused the loss of at least three-quarters of all species known at that time including the dinosaurs. The cause of this mass extinction is a controversial subject among scientists but the fossil evidence of it’s occurrence is abundant. INTRODUCTION The K-T Extinction occurred 65 million years ago. Many species perished in that extinction. Today evidence for this extinction can be seen in the fossil record.... [tags: K-T Extinction]
2446 words (7 pages)
- The History of Earth's Mass Extinctions The four billion year history of earth has witnessed five mass extinctions, and some scientists believe that we are on the verge of the sixth.1 If we are in the midst of the next mass extinction, we are in the very early stages of an evolving, and escalating process. The most recent, or fifth mass of the extinctions occurred 65 million years ago at the boundary between the Cretaceous and Tertiary periods. Images of an asteroid colliding with the planet, decimating the dinosaur population have been in circulation since the early 80’s.2 Being the most recent mass extinction, thousands of scientists around the world have investigated it, and el... [tags: Anthropology Essays Paleontology Papers]
1621 words (4.6 pages)