How many species have become extinct due to humans

how many species have become extinct due to humans

Category:Species made extinct by human activities

> Species made extinct by deliberate extirpation efforts ? (1 C, 8 P) Pages in category "Species made extinct by human activities" The following pages are in this category, out of total. This list may not reflect recent changes (learn more). May 31,  · Applying the same statistical approach to extinction data revealed a rate of to 1, species lost per million per year, mostly due to human-caused habitat destruction and climate ctcwd.com: Christine Dell'amore.

This category lists some of the species that have become extinct due to human activitywhether intentionally or unintentionally. See also the related Category:Holocene extinctions. The following pages are in this category, out of total.

This list may not reflect recent changes learn more. From Wikipedia, the free encyclopedia. This list is incomplete ; you can help by adding missing items with reliable sources. Subcategories This category has only the following subcategory. Pages in category "Species made extinct by human specids The following pages are in this category, out of total.

What is tomorrow election about extinction. F Felicola isidoroi Small Mauritian flying fox Formosan clouded leopard. J Japanese river otter Japanese sea lion. K Kangaroo Island emu. Q Quagga New Zealand quail. X Xerces blue. Categories : Extinct species Human activities with impact on the environment Holocene extinctions Endangered species by reason they are threatened Humans and other species.

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10. Western black rhino

36 Extinct Animals Lost to History Due to Human Activity. What animals are extinct now because of human influence, whether it be pollution, destroyed habitat, an invasive species that humans introduced to a new area, or hunting? We’ve created a list of extinct animals, all . The current rate of extinction is up to 10, times higher than the average historical extinction rates. We, the humans, are almost wholly responsible for this increase. Species are disappearing as you read this. We don't know exactly how many species go extinct every year but it could be , - about 1 every 5 minutes. It’s getting worse.

The brightly colored amphibian had been hiding out in an unlikely place: the latrine. Many on base knew Trouern-Trend as "the guy to identify critters," he said. A lifetime nature lover, he was on his second tour of duty in Iraq as a sergeant. Before releasing the frog into a nearby pond, Trouern-Trend uploaded a picture of it to the mobile app iNaturalist , which connects a worldwide community of people who report sightings of animals and plants online.

App users informed him that he'd found a l emon-yellow tree frog Hyla savignyi —and noted that scientists had never recorded one outside of Kurdistan map. The species' known range had suddenly expanded. This kind of citizen science has exploded in recent years because of smartphones. Now, according to a new review of research about Earth's biodiversity, it's giving conservationists hope that new technology can slow extinctions. That's good news, because according to a review published on May 29 in the journal Science , current extinction rates are up to a thousand times higher than they would be if people weren't in the picture.

Study leader Stuart Pimm , a conservation ecologist at Duke University and contributor to National Geographic's News Watch blog, and his colleagues analyzed various data sources—in particular the International Union for Conservation of Nature's Red List of Threatened Species , a global inventory of species—to produce the first major review of extinction data.

Mobile apps, GIS satellite data, and online crowdsourcing, Pimm says, may be a partial antidote to the problem. Through these technologies, "we're mobilizing millions of people around the world, and we're on the cusp of learning very much more about where species are than we have ever known in the past.

Peter Crane , dean of Yale's School of Forestry and Environmental Studies, said by email that the new "paper does huge service in pulling together the latest thinking on species extinctions for very diverse groups of organisms. Crane, who was not involved in the study, agreed that new technologies like remote sensing and more comprehensive databases "will not only improve the effectiveness of conservation investments, but will also strengthen monitoring of change in species-level biodiversity through time.

Calculating extinction rates can be difficult, in part because no one knows exactly how many species there are.

Scientists have identified at least 1. And according to the study, at least , plant species likely exist. Pimm says conservationists can calculate the extinction rate of the known species by keeping track of how many die out each year. The technique is similar to that used to figure out a country's death rate: track the number of people who die in a given population each year, scaled to that population.

Mortality rates are usually calculated as the number of deaths per thousand people per year. Applying the same statistical approach to extinction data revealed a rate of to 1, species lost per million per year, mostly due to human-caused habitat destruction and climate change.

To calculate the rate of extinction before modern humans evolved, about , years ago, Pimm and his colleagues reviewed data from fossil records and noted when species disappeared, then used statistical modeling to fill in holes in the record. That analysis revealed that before humans evolved, less than a single species per million went extinct annually.

The study authors suspect that the extinction rate will only increase if trends continue—possibly resulting in what scientists call the sixth mass extinction in Earth's history. Another conclusion of the study that can't be ignored, says Yale's Crane, is "that there remain huge gaps in knowledge. At least for the most diverse groups of organisms on Earth, the urgent need to clarify how many species there are, where they live, and how their populations are changing remains a key impediment.

To Jenny McGuire , a postdoctoral research scientist at the University of Washington's School of Environmental and Forest Sciences who wasn't involved in the study, the results aren't surprising. Though some might quibble about the exact rate, she says, "in general scientists are in agreement that we're at a period of heightened extinction risk and rates, and that's been occurring nearly since humans have come onto the landscape.

McGuire sees the new study as a "really excellent call to arms" for people to act to prevent more species from vanishing. She says that people can vote for policies that lessen the impact of climate change, which is hitting the oceans particularly hard by raising the water's pH and dissolving the shells of many marine animals. People can also encourage their governments to connect one nature reserve to another. Pimm says protected areas, the "frontline of conservation," have kept extinction rates of mammals, birds, and amphibians 20 percent lower than they would have been without refuges.

Nearly 13 percent of Earth's land has been set aside, but only 2 percent of the ocean is part of a refuge. Pimm and colleagues noted that global databases and crowdsourcing are helping to fill in blanks by tracking biodiversity outside of protected areas, where species tend to be less studied.

And of course anyone can contribute by becoming a citizen scientist like Trouern-Trend, who said he's part of a "a niche of people who want to help out" by giving conservationists a snapshot of our world.

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Comments:

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