forest has been reduced to just a few metres wide. The southern border of the national park is also subject to annual bushfires. As this lemur is confined to this area‚ there is a lot of worry about the status of this little known species. A population around the village of Ankinajao is already believed to have become extinct due to lots of logging‚ and its total range is now probably no more than 5‚000 square kilometres. Kingdom Animalia‚ Phylum Chordata‚ Class Mammalia‚ Order Primates‚ Family Indriidae
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In biology and ecology‚ extinction is the end of an organism or of a group of organisms (taxon)‚ normally a species. The moment of extinction is generally considered to be the death of the last individual of the species‚ although the capacity to breed and recover may have been lost before this point. Because a species’ potential range may be very large‚ determining this moment is difficult‚ and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa‚ where a species
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About 41‚000 years ago‚ a major part of the Australian environment became extinct‚ the Australian Megafauna (Australian Science‚ 2012). There have been many investigated causes for this‚ but the scientific community cannot decide on one for sure. This is due to lack of evidence for each theory. The most common current theories about the extinction are over hunting‚ climate change and disease. One of the possible causes of extinction of the megafauna is climate change. This is predicted as the megafauna
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Extinction is the end of an organism or group of taxa. Extinctions occur when a species becomes unfit for survival in its natural habitat usually to be replaced by another‚ better-suited species. An organism becomes ill-suited for survival because its environment is changed or because its relationship to other organisms is altered as stated from Credo Reference. The moment of extinction is generally considered to be the death of the last individual of that particular species. Mass extinctions‚ however
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Extinction of Dinosaurs Two-hundred and thirty million years ago the first dinosaur-like creature roamed the earth. Dinosaurs were a very successful and diverse group‚ dominating the terrestrial environments of the earth for 160 million years. The apparently sudden mass extinction of dinosaurs marks the boundary between the Cretaceous and Tertiary periods. Though there is not one definitive explanation to explain dinosaurs’ extinction‚ there are various theories that attempt to account for the
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1 To what extent does the impact theory explain the extinction of the dinosaurs? Dominic Pharaoh 5A Promoter: Harriet Gibson 2011-2012 Dominic Pharaoh 5A Promoter: Harriet Gibson 2 Table of contents I. II. Introduction ......................................................................................................................... 3 The impact theory and the alternative hypotheses .......................................................... 6 A. 1. The impact
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Geology Essay Assignment: Mass Extinctions Topic: The Cretaceous - Tertiary extinction Submitted by Suhaidee Yusoh ID No. 15240 Petroleum Geosciences UNIVERSITI TEKNOLOGI PETRONAS The Cretaceous-Tertiary extinction 1. Introduction Fastovsky‚ D.E. and Weishampel‚ D.B.‚ 2005 defined the mass extinction “Mass extinctions involve large numbers of species and many types of species undergoing global extinction in a geologically short period of time”‚ organisms have gone extinct‚ certainly the present
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pterosaurs‚ ammonites‚ and many families of brachiopods and sea sponges. Also‚ many shark species as well as most vegetation did not survive(“Dinosaur Extinction”). What could have possibly killed off the dominant animal group of the time? The answer to this question is still unclear but there are many hypotheses that attempt to explain this extinction event. To find out exactly how this happened‚ evidence must be gathered not only from fossils
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1056 Dinosaur extinction: An analysis of events and theories that possibly led to the dinosaurs’ demise. Ever since the history of Earth has been studied using fossil records‚ extinctions have always been the object of fascination and interest‚ particularly the mass extinctions that occurred throughout Earth’s history. A mass extinction can be caused by disruptive global environmental changes‚ where large numbers of species have become extinct (Urry et al. 2008). There have been five major
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‘The Earth is experiencing a sixth mass extinction‚ brought on by the proliferation of humanity and its activities of production and consumption. ... The was in which the capital system operates makes a mockery of the necessity of economising. Indeed‚ it pursues everywhere with utmost irresponsibility the opposite of economy: total wastefulness. It is this profit-seeking wastefulness that directly endangers the very survival of humanity (and other creatures that share the planet with us)’ (Jone
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