May 15, 2009 powerpoint showing key extinct animals including dodo and woolly mammoth. The major causes of extinction today are the destruction of habitats, the introduction of nonnative species, pollution, and the overharvesting of species. Mass extinction nearly 23rds or more of all animal. Learn more about the species we are working to protecting from becoming endangered or extinct. Mar 27, 2017 the most devastating extinction event happened 251 million years ago, and completely eradicated 96% of all known species. Find powerpoint presentations and slides using the power of, find free presentations research about causes of extinction ppt. Threatened and endangered, and extinct species ppt download. So if the population of the predators overweighs that of the pres then the prey is in danger of extinction. Extinction, in biology, the dying out or extermination of a species. Extinction occurs when species are diminished because of environmental forces habitat fragmentation, global change, natural disaster, overexploitation of species for human use or because of evolutionary changes in their members genetic inbreeding, poor reproduction, decline.
Extinction can result in an available ecological niche where an organism lives and its behavior in that place to be occupied by other species kinds of extinction background extinction. One million plant and animal species are on the verge of extinction, with alarming implications for human survival, according to a united nations. Local extinction of species can occur with a substantial delay following habitat loss or degradation. The issue that is concerning is that our current extinction rate is much higher than the background ie normal extinction rate that would be expected. A free powerpoint ppt presentation displayed as a flash slide show on id.
The biodiversity of species and their rates of extinction. The development of new species and extinction of existing species are natural processes that have always occurred. If over an extended period of time the birth rate of a species is less than the death rate, then extinction will eventually occur. Many animals have roles in their environment that makes it home to others. Ppt extinction of species powerpoint presentation free. Species with long generation times and populations near their extinction threshold are most likely to have an. When it is not seen in the wild for 50 years at a stretch. Endangered species power point presentation by jessica. Your students will love this simulationstyle game to introduce or reinforce the concepts of extinction, endangered species, and threatened species.
Quizlet flashcards, activities and games help you improve your grades. Because a species potential range may be very large, determining this moment is difficult, and is usually done. On the extinction of species scientific american blog. Good starting point for background information on extinction. A large loss of species in a brief geological period of time cretaceous extinction when the. Endangered species of illinois douglashart nature center. This power point presentation focuses on species extinction described in the biology text book of 8th standard, in chapter 3beauty of. Introduced species nonnative or exotic species are species that are not native to a particular region. Extinction and conservation lesson teaching resources. Over hunting and over fishing have threatened species since hunting and fishing were originally developed in an effective form.
The species approach species extinction species can become extinct. Population genetics and demographic phenomena affect the evolution. The international union for conservation of nature iucn, in its red list of threatened species, assesses species extinction risk as least concern, nearthreatened, three progressively escalating categories of threatened species vulnerable, endangered, and critically endangered, and extinct. Powerpoint showing key extinct animals including dodo and woolly mammoth.
Deextinction, or resurrection biology, or species revivalism is the process of creating an organism, which is either a member of, or resembles an extinct species, or breeding population of such. Apart from the common worries about global warming, industrial pollution, and rain forests being cut down, there is also the huge problem of the extinction of species. Although a species may be extinct in the wild, the species is not considered extinct until every individualregardless of location, captivity, or ability to breedhas perished. View and download powerpoint presentations on causes of extinction ppt. Extinction occurs when plants and animals that were on earth are no longer present due to environmental or physical changes. We offer hundreds of free ppt and themes for powerpoint. Smallpox virus eradication and cloning extinct animals. Species list endangered, vulnerable, and threatened. Lesson potentially 2 or a homework task at least on extinction and its causes.
As populations decline, an insidious mutual reinforcement occurs among biotic and abiotic processes driving population size downward to extinction. Sep 18, 2015 probably 500 million species have existed over time background rate of extinction. A species is no longer found in an area it once inhabited but is still found elsewhere in the world. Endangered species power point presentation by jessica davis. Accidental or deliberate introduction of exotic species 4. One that is in danger of extinction throughout all or a significant portion of their range. The most devastating extinction event happened 251 million years ago, and completely eradicated 96% of all known species. The extinctions include birds, mammals, reptiles, and amphibians. There are different ways a mass extinction can occur including asteroids comets global warming ice age and more how many mass extinctions have there been. Biodiversity extinction the process by which an organism is no longer in existence as a species extinct organisms dinosaur woolly mammoth saber tooth. Accumulating evidence suggests that such extinction debts pose a significant but often unrecognized challenge for biodiversity conservation across a wide range of taxa and ecosystems.
So when there is an extinction of an animal we simply mean that a specific species no longer exists or have died. The cretaceouspaleogene extinction event is the most recent mass extinction and the only one definitively connected to a major asteroid impact. Its simple setup includes game instructions, game board for each student, and 8 writing. Probably 500 million species have existed over time background rate of extinction. On the extinction of species scientific american blog network. 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. This was probably due to a comet or asteroid impact. Mass extinction began about threemillion years ago continental glaciations. Species extinction facts 16,928 plant and animal species are known to be threatened with extinction. Of course, the keystone species has no idea that they are helping others, but it lines up to be that way. Today approximately 1,000 species out of the worlds 10,000 are on the verge of extinction.
To better predict the ecological and evolutionary effects of the emerging biodiversity crisis in the modern oceans, we compared the association between extinction threat and ecological traits in modern marine animals to associations observed during past extinction events using a database of. When its number has been reduced to a critical level or whose habitats are drastically reduced and if such a species is not protected and conserved, its in immediate danger of extinction. Ppt extinction powerpoint presentation free to download. Mass extinction facts and information from national geographic. The number of newly listed threatened and endangered species greatly outweighs the number recovered from threatened extinction. With contemporary extinction being attributed to human activity.
By taking part in our saving life on earth campaign, you can help build a coasttocoast network to ensure the united states is a leader in saving the worlds biodiversity. Timeline presentations for powerpoint help make a detailed analysis of population of a particular animal. Aug 17, 2011 lyell accepted a local extinction of species as consequences of climatic change, concurrence and human activity like in the case of the dodo, however these local extinctions were reversible. Extinction of species article about extinction of species.
Applying the hcp habitat conservation plan of the endangered species act, these animals will have hope fore the future. Endangered species of illinois ecomeet study guide helpful hints. Extinction extinction the definition and causes what is extinction. This refers to the extinction of species or populations long after habitat alteration. Extinction and invasive species twinsburg ppt presentation summary. When a plant or animal species that once lived stops existing entirely, we say that that species has become extinct. The ecomeet test may consist of multiple choice, truefalse, fill in the blank, matching, label a diagram, short answer, or identification using pictures.
Take a statistical approach and show worldwide population trends of the endangered specie under observation. Extinction of species evolution biology fuseschool. For marine species, responsibility lies with with the national marine fisheries service of the department of commerce. Were in the midst of the earths sixth mass extinction crisis. Recognize that some plants and animals that formerly inhabited the earth are no longer present on earth. A few species effected by unsustainable hunting are. Mass extinctions powerpoint notes the history of life on earth has been disrupted by major catastrophic events, such as major volcanic eruptions or the impacts of asteroids. Concerned groups and governments are trying to save these endangered species through breeding and preserving their habitat but these are all temporary solutions. Animal extinction causes and effects when we talk of animal extinction, we talk of a species in particular becoming extinct. They are like to be fed on and wiped pout of the earths surface. Anything in this study guide has the potential to be on the. What we need to do is to address the root causes of extinction of species. Extinction of organic forms takes place as a result of natural selection in the presence of essential changes in the external environment in those instances when organisms do not. Coextinction the loss of one species leads to the loss.
Ppt deextinction and the conception of species leonard. It is a scientific certainty when there are not any. This extinction is thought to have started once homo sapiens started dispersing outward from africa on the land bridges, hunting and gathering was the start of the extinctions induced by man. Here are some organisms, throughout earths history, that have gone extinct. Lyell accepted a local extinction of species as consequences of climatic change, concurrence and human activity like in the case of the dodo. Do habitat conservation plans protect endangered species. Species directory wwf endangered species conservation. Characteristics of species and their relationship to extinction. Cloning and the resurrection of extinct species selection or engineering. Extinction of one species triggers the loss of another species. Extinction is forever when is a species considered extinct. Wilson estimates that 30,000 species per year or three species per hour are being driven to extinction.
But theres still time to halt this crisis and we need your help. It works well in whole group, small group, or science centers. A keystone species is a species in which other species in that ecosystem depend on for survival. The extinction rate is the rate at which species are becoming extinct. Extinction is the termination of a kind of organism or of a group of kinds, usually a species. For instance, when a there is an outbreak of a disease to a specific species. Scientists predict that more than 1 million species are on track for extinction in the coming decades. Finally diseases can cause extinction in a species. The extinction of species it is not a secret that the ecological situation on our planet is rather complicated. But the idea that a species could go extinct is a relatively new one, first proposed by anatomist georges cuvier in a presentation in paris in 1796 in a lecture on the extinction of the mastodon, then thought by some to still be roaming the illexplored western reaches of north america. Amount of species that went extinct before humans became the dominant species on earth with the advent of agriculture species extinctions have increased dramatically 8000 b. One that is likely to become endangered within the forseeable future. Extinction of species of plants, animals, microorganisms, a phenomenon that occurs during the process of development of living nature during the earths geological history. Habitat loss introduced species population growth pollution overconsumption loss of biodiversity habitat loss the destruction of habitats is the number one cause of species extinction.
Find collection of free to download endangered species powerpoint templates. The number of threatened and endangered species in the united states is increasing monthly and critical habitat is constantly being destroyed. This study guide will focus on endangered species of illinois. Endangered species and extinction ppt video online download.
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