Holocene extinction in the context of "Invertebrate"

Human impact on the environment (or anthropogenic environmental impact) refers to changes to biophysical environments and to ecosystems, biodiversity, and natural resources caused directly or indirectly by humans. Modifying the environment to fit the needs of society (as in the built environment) is causing severe effects including global warming, environmental degradation (such as ocean acidification), mass extinction and biodiversity loss, ecological crisis, and ecological collapse. Some human activities that cause damage (either directly or indirectly) to the environment on a global scale include population growth, neoliberal economic policies and rapid economic growth, overconsumption, overexploitation, pollution, and deforestation. Some of the problems, including global warming and biodiversity loss, have been proposed as representing catastrophic risks to the survival of the human species.

The term anthropogenic designates an effect or object resulting from human activity. The term was first used in the technical sense by Russian geologist Alexey Pavlov, and it was first used in English by British ecologist Arthur Tansley in reference to human influences on climax plant communities. The atmospheric scientist Paul Crutzen introduced the term "Anthropocene" in the mid-1970s. The term is sometimes used in the context of pollution produced from human activity since the start of the Agricultural Revolution but also applies broadly to all major human impacts on the environment. Many of the actions taken by humans that contribute to a heated environment stem from the burning of fossil fuel from a variety of sources, such as electricity, cars, planes, space heating, manufacturing, or the destruction of forests.

Criticism of capitalism typically ranges from expressing disagreement with particular aspects or outcomes of capitalism to rejecting the principles of the capitalist system in its entirety. Criticism comes from various political and philosophical approaches, including anarchist, socialist, religious, and nationalist viewpoints. Some believe that capitalism can only be overcome through revolution while others believe that structural change can come slowly through political reforms. Some critics believe there are merits in capitalism and wish to balance it with some form of social control, typically through government regulation (e.g. the social market movement).

Prominent among critiques of capitalism are accusations that capitalism is inherently exploitative, alienating, unstable, unsustainable, and creates massive economic inequality, commodifies people, is anti-democratic, leads to an erosion of human rights and national sovereignty while it incentivises imperialist expansion and war, and that it benefits a small minority at the expense of the majority of the population. There are also criticisms from environmental scientists and activists, leftists, degrowthers and others, that it depletes resources, causes climate change, biodiversity loss, topsoil loss, eutrophication, and generates massive amounts of pollution and waste.

Background extinction rate (BER), also known as the normal extinction rate, refers to the standard rate of extinction in Earth's geological and biological history, excluding major extinction events, such as the current human-induced Holocene extinction. There have been five mass extinction events throughout Earth's history.

Batrachochytrium dendrobatidis (/bəˌtreɪkoʊˈkɪtriəm ˈdɛndroʊbətaɪdɪs/ bə-TRAY-koh-KIT-ree-əm DEN-droh-bə-ty-dis), also known as Bd or the amphibian chytrid fungus, is a fungus that causes the disease chytridiomycosis in amphibians.

Since its discovery in 1998 by Lee Berger and species description in 1999 by Joyce E. Longcore, the disease devastated amphibian populations around the world, in a global decline towards multiple extinctions, part of the Holocene extinction. A recently described second species, B. salamandrivorans, also causes chytridiomycosis and death in salamanders.

The 20th century began on 1 January 1901 (MCMI), and ended on 31 December 2000 (MM). It was the 10th and last century in the 2nd millennium and was marked by new models of scientific understanding, unprecedented scopes of warfare, new modes of communication that would operate at nearly instant speeds, and new forms of art and entertainment. Population growth was also unprecedented, as the century started with around 1.6 billion people, and ended with around 6.2 billion.

The 20th century was dominated by significant geopolitical events that reshaped the political and social structure of the globe: World War I, the Spanish flu pandemic, World War II and the Cold War. Unprecedented advances in science and technology defined the century, including the advent of nuclear weapons and nuclear power, space exploration, the shift from analog to digital computing and the continuing advancement of transportation, including powered flight and the automobile. The Earth's sixth mass extinction event, the Holocene extinction, continued, and human conservation efforts increased.

The South Island takahē (Porphyrio hochstetteri) is a flightless swamphen indigenous to New Zealand and the largest living member of the rail family. It is often known by the abbreviated name takahē, which it shares with the recently extinct North Island takahē. The two takahē species are also known as notornis.

Takahē were hunted extensively by both early European settlers and Māori, and takahē bones have been found in middens in the South Island. Fossil remains have also been found across the South Island. They were not named and described by Europeans until 1847, and then only from fossil bones. In 1850 a living bird was captured, and three more collected in the 19th century. After another bird was captured in 1898, and no more were to be found, the species was presumed extinct. Fifty years later, however, after a carefully planned search, South Island takahē were dramatically rediscovered in November 1948 by Geoffrey Orbell in an isolated valley in the South Island's Murchison Mountains. The species is now managed by the New Zealand Department of Conservation, whose Takahē Recovery Programme maintains populations on several offshore islands as well as Takahē Valley. Takahē has been reintroduced to numerous locations across the country. Although South Island takahē are still a threatened species, their NZTCS status was downgraded in 2016 from Nationally Critical to Nationally Vulnerable. As of 2023, the population is around 500 and is growing by 8 percent per year.