Endangered species

An endangered species is a species of organisms facing a very high risk of extinction. The phrase is used vaguely in common parlance for any species fitting this description, but its use by conservation biologists typically refers to those designated Endangered in the IUCN Red List, where it is the second most severe conservation status for wild populations, following Critically Endangered. There are currently 3079 animals and 2655 plants classified as Endangered worldwide, compared with 1998 levels of 1102 and 1197, respectively.

Conservation status

he conservation status of a species is an indicator of the likelihood of that endangered species becoming extinct. Many factors are taken into account when assessing the conservation status of a species, including statistics such as the number remaining, the overall increase or decrease in the population over time, breeding success rates, known threats, and so on. The IUCN Red List of Threatened Species is the best-known worldwide conservation status listing and ranking system

Planet Earth and it’s Endangered Species

 

Facts on Endangered Species 

• An endangered species is a specie, plant or animal, that is in immediate danger of becoming extinct. Its numbers are usually low and it needs protection in order to survive. The Siberian tiger, the southern sea otter, the snow leopard, the green pitcher plant, and thousands of other plants and animals are endangered worldwide.

•  There are 38 million acres lost per year in tropical rainforests. Up to one half of the world’s species live in these areas.

• The rate of extinction is 1 species every 100 years

• In North America alone, there are 500 species that have disappeared in the last 400 years

• The total number of species facing extinction in 2004, according to IUCN’s Red List of Threatened species in 15 589. These include 1 in 3 amphibians, half of freshwater turtles, 1 in 8 birds and 1 in 4 mammals.

 Endangered Species around the World

Different categories of endangered species

Reasons for the endangerment 

Habitat Destruction
Hunting 
Pollution 
Natural disasters 
Global warming
Disease
No protection 
Unequal distribution of species

Why Save Endangered Species?


Plants and animals hold medicinal, agricultural, ecological, commercial and aesthetic/recreational value. Endangered species must be protected and saved so that future generations can experience their presence and value.

Medicinal

Plants and animals are responsible for a variety of useful medications. In fact, about forty percent of all prescriptions written today are composed from the natural compounds of different species. These species not only save lives, but they contribute to a prospering pharmaceutical industry worth over $40 billion annually. Unfortunately, only 5% of known plant species have been screened for their medicinal values, although we continue to lose up to 100 species daily.
The Pacific yew, a slow-growing tree found in the ancient forests of the Pacific Northwest, was historically considered a "trash" tree (it was burned after clearcutting). However, a substance in its bark taxol was recently identified as one of the most promising treatments for ovarian and breast cancer.
Additionally, more than 3 million American heart disease sufferers would perish within 72 hours of a heart attack without digitalis, a drug derived from the purple foxglove.

Agricultural

There are an estimated 80,000 edible plants in the world. Humans depend upon only 20 species of these plants, such as wheat and corn, to provide 90% of the world's food. Wild relatives of these common crops contain essential disease-resistant material. They also provide humans with the means to develop new crops that can grow in inadequate lands such as in poor soils or drought-stricken areas to help solve the world hunger problem. In the 1970s, genetic material from a wild corn species in Mexico was used to stop a leaf fungus that had previously wiped out 15% of the U.S. corn crop.

Ecological

Plant and animal species are the foundation of healthy ecosystems. Humans depend on ecosystems such as coastal estuaries, prairie grasslands, and ancient forests to purify their air, clean their water, and supply them with food. When species become endangered, it is an indicator that the health of these vital ecosystems is beginning to unravel. The U.S. Fish and Wildlife Service estimates that losing one plant species can trigger the loss of up to 30 other insect, plant and higher animal species.
The northern spotted owl, listed as threatened in 1990, is an indicator of the declining health of the ancient forests of the Pacific Northwest. These forests are the home to over 100 other old-growth dependent species, which are at risk due to decades of unsustainable forest management practices.
Pollution off the coast of Florida is killing the coral reefs along the Florida Keys, which serve as habitat for hundreds of species of fish. Commercial fish species have begun to decline, causing a threat to the multi-million dollar tourism industry, which depends on the quality of the environment.

Commercial

Various wild species are commercially raised, directly contributing to local and regional economies. Commercial and recreational salmon fishing in the Pacific Northwest provides 60,000 jobs and $1 billion annually in personal income, and is the center of Pacific Northwest Native American culture. This industry and way of life, however, is in trouble as salmon decline due to habitat degradation from dams, clearcutting, and overgrazing along streams.
Freshwater mussels which are harvested, cut into beads, and used to stimulate pearl construction in oysters form the basis of a thriving industry which supports approximately 10,000 U.S. jobs and contributes over $700 million to the U.S. economy annually. Unfortunately, 43% of the freshwater mussel species in North America are currently endangered or extinct.

TEN MOST ENDANGERED ANIMALS

 

IVORY-BILLED WOODPECKER

The most critically endangered species on our list of the ten most critically endangered animals is the ivory-billed woodpecker, which lives or lived in the Southeastern part of the US as well as Cuba. This huge woodpecker was considered extinct until 2004, when a handful of tantalizing reports of sightings in Arkansas and Florida began to trickle in. However, definitive proof for the ivory-bill’s continued existence has remained elusive, and if a population does exist, it is likely to be tiny and extremely vulnerable. The ivory-billed woodpecker owes its near- or complete extinction to habitat loss (logging) as well as over-exploitation by humans, who hunted it for its feathers.

AMUR LEOPARD

The Amur leopard (Panthera pardus orientalis) is a very rare leopard subspecies that lives only in the remote and snowy northern forests of eastern Russian’s Primorye region. Its former range included Korea and northern China, but the Amur leopard is now extinct in those countries. A 2007 census counted only 14-20 adult Amur leopards and 5-6 cubs. Threats facing the species include habitat loss due to logging, road building and encroaching civilization, poaching (illegal hunting) and global climate change

JAVAN RHINOCEROS

 The Javan rhinoceros (Rhinoceros sondaicus) is the most endangered of the world’s five rhinoceros species, with an estimated 40-60 animals remaining on the western tip of the Island of Java (Indonesia) in Ujung Kulon National Park. The last member of another tiny population in Vietnam’s Cat Tien National Park was killed by poachers in 2011. The water- and swamp-loving Javan rhinoceros formerly ranged throughout Southeast Asia and Indonesia, but has been hunted to near-extinction for its horn, which is used to make Asian folk medicines. Although it is now protected, it may not have a large-enough breeding population to prevent the species from going extinct.

THE NORTHERN SPORTIVE LEMUR

It is very difficult to say that one lemur species is more endangered than another. There are around 100 species of these primates, all of which live on the Island of Madagascar, off the southeast coast of Africa. Virtually all of them are declining dramatically in population, mostly because of habitat loss due to logging in the forests where they live—but also because of illegal hunting. Many lemur species are listed as Endangered or Critically Endangered by the International Union for the Conservation of Nature (IUCN). All About Wildlife has always had a lemur on our Top 10 Endangered Species list; until this year, that lemur was the greater bamboo lemur, of which perhaps fewer than 100 individuals remain. But researchers recently reported that there may be fewer than 20 of the Critically Endangered northern sportive lemurs (Lepilemur septentrionalis) left in the wild, so we decided to make a switch. According to the IUCN, the northern sportive lemur lives on and around just one small mountain at the northern tip of Madagascar. This lemur is a tiny creature, weighing less than two pounds. It has large eyes to give it better night vision.

NORTHERN RIGHT WHALE

WESTERN LOWLAND GORILLA

 

There are two lowland gorillas native to West Africa: the western lowland gorilla (Gorilla gorilla), which is the most numerous of the four gorilla subspecies, with over 100,000 individuals in the wild, and the Cross River gorilla (Gorilla diehli), of which only a tiny population of a few hundred remains. Both are listed by the IUCN as Critically Endangered because of the fact that their populations have declined by over 60 percent during the past 25 years—and are projected to continue dropping over the coming decades. Causes for the increasing scarcity include habitat loss and illegal commercial hunting by poachers, who sell gorillas for food in West African markets. But the largest killer of gorillas has been a deadly illness—the incurable ebola virus—which has ended the lives of up to 90 percent of these great apes in some forest areas.