Monday September 23, 2019

UN Report: Upto 1 Million Species Face Extinction Because of Human Influence

“We need to recognize that climate change and loss of nature are equally important, not just for the environment, but as development and economic issues as well”

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humans, extinction
Climate change activists stage a protest outside the H M Treasury building in central London, April 25, 2019, during environmental protests by the Extinction Rebellion group. VOA

Up to 1 million species face extinction because of human influence, according to a draft U.N. report obtained by AFP that painstakingly catalogues how humanity has undermined the natural resources upon which its very survival depends.

The accelerating loss of clean air, drinkable water, CO2-absorbing forests, pollinating insects, protein-rich fish and storm-blocking mangroves — to name but a few of the dwindling services rendered by nature — poses no less of a threat than climate change, says the report, set to be unveiled May 6.

Indeed, biodiversity loss and global warming are closely linked, according to the 44-page Summary for Policy Makers, which distills a 1,800-page U.N. assessment of scientific literature on the state of nature.

Delegates from 130 nations meeting in Paris from April 29 will vet the executive summary line-by-line. Wording may change, but figures lifted from the underlying report cannot be altered.

“We need to recognize that climate change and loss of nature are equally important, not just for the environment, but as development and economic issues as well,” Robert Watson, chair of the U.N.-mandated body that compiled the report, told AFP, without divulging its findings.

“The way we produce our food and energy is undermining the regulating services that we get from nature,” he said, adding that only “transformative change” can stem the damage.

Deforestation and agriculture, including livestock production, account for about a quarter of greenhouse gas emissions, and have wreaked havoc on natural ecosystems as well.

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Activists sing songs at the Extinction Rebellion group’s environmental protest camp at Marble Arch in London, April 25, 2019, during the group’s protest calling for political change to combat climate change. VOA

‘Mass extinction event’

The Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) report warns of “an imminent rapid acceleration in the global rate of species extinction.”

The pace of loss “is already tens to hundreds of times higher than it has been, on average, over the last 10 million years,” it notes.

“Half-a-million to a million species are projected to be threatened with extinction, many within decades,” it continues.

Many experts think a so-called “mass extinction event” — only the sixth in the last half-billion years — is already under way.

The most recent saw the end of the Cretaceous period some 66 million years ago, when a 10-kilometerwide asteroid strike wiped out most life forms.

Scientists estimate that Earth is today home to about 8 million distinct species, a majority of them insects.

A quarter of catalogued animal and plant species are being crowded, eaten or poisoned out of existence.

The drop in sheer numbers is even more dramatic, with wild mammal biomass — their collective weight — down by 82 percent.

Humans and livestock account for more than 95 percent of mammal biomass.

humans, extinction
Climate change activists demonstrate opposite the Bank of England in the financial district in London, April 25, 2019, during environmental protests by the Extinction Rebellion group. VOA

Population growth

“If we’re going to have a sustainable planet that provides services to communities around the world, we need to change this trajectory in the next 10 years, just as we need to do that with climate,” noted WWF chief scientist Rebecca Shaw, formerly a member of the U.N. scientific bodies for both climate and biodiversity.

The direct causes of species loss, in order of importance, are shrinking habitat and land-use change, hunting for food or illicit trade in body parts, climate change, pollution, and alien species such as rats, mosquitoes and snakes that hitch rides on ships or planes, the report finds.

“There are also two big indirect drivers of biodiversity loss and climate change: the number of people in the world and their growing ability to consume,” Watson said.

Once seen as primarily a future threat to animal and plant life, the disruptive impact of global warming has accelerated.

Shifts in the distribution of species, for example, will likely double if average temperature go up a notch from 1.5 degrees Celsius (2.7 Fahrenheit) to 2C.

So far, the global thermometer has risen 1C compared with mid-19th century levels.

The 2015 Paris Agreement enjoins nations to cap the rise to “well below” 2C. But a landmark U.N. climate report in October said that would still be enough to boost the intensity and frequency of deadly heat waves, droughts, floods and storms.

Global inequity

Other findings in the report include:

  • Three-quarters of land surfaces, 40 percent of the marine environment, and 50 percent of inland waterways across the globe have been “severely altered.”
  • Many of the areas where Nature’s contribution to human wellbeing will be most severely compromised are home to indigenous peoples and the world’s poorest communities that are also vulnerable to climate change.
  • More than 2 billion people rely on wood fuel for energy, 4 billion rely on natural medicines, and more than 75 percent of global food crops require animal pollination.
  • Nearly half of land and marine ecosystems have been profoundly compromised by human interference in the last 50 years.
  • Subsidies to fisheries, industrial agriculture, livestock raising, forestry, mining and the production of biofuel or fossil fuel energy encourage waste, inefficiency and overconsumption.

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The report cautioned against climate change solutions that may inadvertently harm nature.

The use, for example, of biofuels combined with “carbon capture and storage” — the sequestration of CO2 released when biofuels are burned — is widely seen as key in the transition to green energy on a global scale.

But the land needed to grow all those biofuel crops may wind up cutting into food production, the expansion of protected areas or reforestation efforts. (VOA)

Next Story

Researchers Report Two Newly Discovered Species of Electric Eels in South America

The researchers collected 107 eels in four countries and found differences in their DNA, along with minor physical variations

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A man holds an electric eel which he found in front of his flooded house in Sao Paulo. VOA

Researchers report two newly discovered species of electric eels in South America, one of which can deliver a bigger jolt than any other known animal.

The researchers collected 107 eels in four countries and found differences in their DNA, along with minor physical variations.

One species had the ability to generate 860 volts of electricity, more than the 650 volts discharged by the only previously identified type of electric eel.

While 250 species of fish in South America generate electricity, only electric eels use it to stun prey and for self-protection.

Researchers, Species, Electric Eels
Researchers report two newly discovered species of electric eels in South America, one of which can deliver a bigger jolt than any other known animal. Pixabay

Study leader C. David de Santana of Smithsonian National Museum of Natural History says the discovery illustrates the importance of protecting and studying the Amazon rainforest area.

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The study was published this week in the journal Nature Communications. (VOA)