great danger or difficulty‚ the moment when things change and either improve or get worse. This meaning has been taken from the Oxford Dictionary. Thus‚ biodiversity crisis means the large number of different animals and plants are decreasing or in other word it’s facing extinction or becoming endangered. It also means that the large number of animals and plants are in a great danger. LOSES OF BIODIVERSITY Some species that are more vulnerable to extinction than others include species at the
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1. Explain how human activities can cause an imbalance in biogeochemical cycling and lead to problems such as cultural eutrophication and kill fish. biogeochemical cycles are the pathway that chemicals cycle within the ecosystems involving both living and non-living things. Human activities have a direct impact and can cause an imbalance of these chemicals. A few examples of this would be mining and burning fossil fuels‚ this would increase the amount of chemical elements removed from the reservoirs
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Theories For The Extinction of Dinosaurs Theory Evidence They’d been around too long and just ran out of ways to evolve. The dinosaurs were a group of organisms that lasted around 180 million years‚ evidence suggests that these organisms ran out of ways to evolve and as a result could not cope with changing conditions. They were poisoned by the newly evolving plant life which produced chemicals to protect themselves from predation. This theory is plausible as it ties in with the first one‚ as the
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Invasive Species: Asian Carp Asian carps are different species of fish that originated in many parts of Eurasia. There are 4 different types of Asian carps‚ but the silver carp and bighead carp are mostly found in the Mississippi River drainage basin and Illinois River. The silver and bighead carp first came to North America from China in 1973. Being filter feeders‚ they were imported to remove algae and suspended matter‚ ultimately trying to improve water qualities in aquaculture ponds. However
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Endangered Species Endangered species is a broad issue‚ one that involves the habitats and environments where species reside and intermingle with one another. Some measures are being taken to help specific cases of endangerment‚ but the question I have is should the Endangered Species Act be strengthened. The universal problem cannot be fixed until us as humans protect the natural environments where endangered species live. The Endangered Species Act of 1973 is one of the most popular and successful
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ecosystem is continuously changing rapidly‚ mostly in the reason of human impact. Humans make huge impacts on the world and many of those impacts involves human-caused extinctions. Evidently‚ this has become a huge issue relating on biodiversity and there have been many extinctions due to global warming‚ pollution‚ hunting‚ etc. In addition‚ there are many conservation acts being placed on endangered species for protection and the species are placed out of their normal habitat in the wild. Unfortunately
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triggered mass extinctions on the lands and in the oceans so profound that they define the geological boundary between the older Mesozoic Era‚ often called the "Age of Reptiles‚" and the modern Cenozoic Era‚ the "Age of Mammals." <br><li>On a finer scale‚ the extinctions define the boundary between the Cretaceous (geological symbol‚ "K")‚ and Tertiary ("T") periods. This mass extinction is usually referred to as the K-T extinctions. The dinosaurs became extinct during the K-T mass extinction. To examine
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The Asiatic lion (Panthera leo persica)‚ also known as the Indian lion‚ is a lion subspecies that exists as a single isolated population in India’s Gujarat State. It is listed as Endangered by IUCN based on the small population size.[1] The lion population has steadily increased in Gir Forest National Park‚ more than doubling from a low of 180 individuals in 1974 to a level of 411 individuals consisting of 97 adult males‚ 162 adult females‚ 75 sub-adults‚ and 77 cubs as of April 2010.[3] The Asiatic
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Many believe that humans are the perfect species. Many believe that no other species in the universe can compare to the intellect and emotional stability of humans. Although this is the popular belief for the majority of the public‚ many philosophers say this is not the case. Humans are far from perfect and various authors and journalists‚ directors and philosophers exemplify how humans are flawed daily through their works. Alexandre Dumas and Homer are two particular authors/philosophers that not
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Scott Lodde: Description of how genetic variation and genetic drift affects extinction of various species. http://highered.mheducation.com/sites/9834092339/student_view0/chapter20/simulation_of_genetic_drift.html http://anthro.palomar.edu/synthetic/synth_5.htm Genetic drift has many factors that can be linked to the extinction of a species. Genetic drift is a change in allele frequency which can rise or fall over time. Genetic drift lowers genetic variation every generation. The strength genetic
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