Permian–Triassic extinction event

During this era, there were three periods. The Triassic period, The Jurassic Period, and The Cretaceous period were all very significant in earth’s evolution. Not just in animals, but in land, plants, climate, and even insects. The Triassic period was the first period of the Mesozoic era and occurred between 251 and 200 million years ago. At this time the earth was very bare. The planet was recovering from an event that caused a great mass extinction of over 90% of the earth’s species. It did…

Extinction is necessary for the Earth’s natural order. It is used as the world 's way of weeding out the weaker species that are unable to adapt or evolve to environmental change thus consequently dying out to make room for the newer better-adapted species which is key in providing the earth with a more sustainable and better-equipped equilibrium. With five mass extinctions notched into the earth 's belt it can hardly be denied that evolution and extinction are anything but a necessary, yet dark…

considered the Eocene. According to the researchers of Department of Earth and Planetary Sciences, the latest Paleocene rocks record a methane release (Dickens et al., 1995) that prevented severe winter cooling in Polar Regions (Sloan et al., 1992). This event resulted in a dramatic 4–8 °C increase in deep-ocean, high latitude, and continental temperatures (Zach’s et al., 1993), marking the onset of warm conditions that extended into the Eocene. The global plant fossil record of the Eocene…

diverse possibility for ecological expansion for many new species. This reason states that this can’t happen again because the world will never be that empty again. This goes along with the idea of Darwinism. The bursts of life after the Permian extinction quantitatively matched up with the Cambrian explosion, but not qualitatively. The second reason is that genetic changes were more “acceptable” back during the time of the Cambrian explosion. Now, genomes are very intricate and changes are…

biological crisis are. KEYWORDS Biological crisis, Extinction of species, environmental ecosystems, massive extinction, ecological niches, Industrial Era, greenhouses gases, global warming, sea level, co2 emissions, toxic wastes, Ocean acidification, ocean currents, UV and Infrared Radiations, Global temperature, deforestation, density and salinity of water, Ozone layer. INTRODUCTION Lot of researchers and scientists argue…

The changes vary across the Arctic; the largest decreases occur in maritime regions of the Arctic (Alaska, northern Scandinavia, and the Pacific coast region of Russia) [8]. Climate model projections indicate decreases in the duration of snow cover of 10 to 20% over most of the Arctic by 2050 and Scandinavia will experience the most loss (around 30 to 40%) [2]. 2.4 Temperature Average Arctic temperatures have increased at almost twice the global average rate in the past 100 years according to…