Showing posts with label habitat destruction. Show all posts
Showing posts with label habitat destruction. Show all posts

Friday, March 20, 2020

A Big Fall



The Greeks were well-familiar with the concept of hamartia, which can be defined as follows:
The term hamartia derives from the Greek ἁμαρτία, from ἁμαρτάνειν hamartánein, which means "to miss the mark" or "to err".[1][2] It is most often associated with Greek tragedy....
In literature, it is usually associated with the protagonist's tragic flaw, which often manifests itself as hubris, a kind of exaggerated pride or arrogance, and it never ends well.

Unfortunately, hubris is not a mere literary construct. Its presence is increasingly evident in the world today, and it is fueled by a massive error in our character, our collective tragic flaw: the belief that we are somehow above, not part of, nature.

The result, if you will forgive a cliché, is that the chickens are now coming home to roost.
... a number of researchers today think that it is actually humanity’s destruction of biodiversity that creates the conditions for new viruses and diseases such as Covid-19, the viral disease that emerged in China in December 2019, to arise – with profound health and economic impacts in rich and poor countries alike. In fact, a new discipline, planetary health, is emerging that focuses on the increasingly visible connections between the wellbeing of humans, other living things and entire ecosystems.
Our aggressive, heedless thirst for greater and greater economic gain has resulted in widespread habitat destruction, with dire results:
“We invade tropical forests and other wild landscapes, which harbour so many species of animals and plants – and within those creatures, so many unknown viruses,” David Quammen, author of Spillover: Animal Infections and the Next Pandemic, recently wrote in the New York Times. “We cut the trees; we kill the animals or cage them and send them to markets. We disrupt ecosystems, and we shake viruses loose from their natural hosts. When that happens, they need a new host. Often, we are it.”
While we have always had a certain number of viruses that originate in animals and infect us, such as rabies and plague, up to now, with modern medicine and detection, the threat has been manageable.

Not anymore.
Research suggests that outbreaks of animal-borne and other infectious diseases such as Ebola, Sars, bird flu and now Covid-19, caused by a novel coronavirus, are on the rise. Pathogens are crossing from animals to humans, and many are able to spread quickly to new places. The US Centers for Disease Control and Prevention (CDC) estimates that three-quarters of new or emerging diseases that infect humans originate in animals.
Kate Jones, chair of ecology and biodiversity at UCL, says the emergence and spread of these bugs
... are linked to environmental change and human behaviour. The disruption of pristine forests driven by logging, mining, road building through remote places, rapid urbanisation and population growth is bringing people into closer contact with animal species they may never have been near before, she says.

The resulting transmission of disease from wildlife to humans, she says, is now “a hidden cost of human economic development. There are just so many more of us, in every environment. We are going into largely undisturbed places and being exposed more and more. We are creating habitats where viruses are transmitted more easily, and then we are surprised that we have new ones.”
Disease ecologist Thomas Gillespie, says that things will get much worse:
Wildlife everywhere is being put under more stress, he says. “Major landscape changes are causing animals to lose habitats, which means species become crowded together and also come into greater contact with humans. Species that survive change are now moving and mixing with different animals and with humans.”
Human activity is at the root of this multi-faceted problem. Habitat destruction and the world population explosion leads to other sources of infection, not the least of which are markets that have opened up to feed an increasingly hungry world:
Here, animals are slaughtered, cut up and sold on the spot.

The “wet market” (one that sells fresh produce and meat) in Wuhan, thought by the Chinese government to be the starting point of the current Covid-19 pandemic, was known to sell numerous wild animals, including live wolf pups, salamanders, crocodiles, scorpions, rats, squirrels, foxes, civets and turtles.

Equally, urban markets in west and central Africa sell monkeys, bats, rats, and dozens of species of bird, mammal, insect and rodent slaughtered and sold close to open refuse dumps and with no drainage.

“Wet markets make a perfect storm for cross-species transmission of pathogens,” says Gillespie. “Whenever you have novel interactions with a range of species in one place, whether that is in a natural environment like a forest or a wet market, you can have a spillover event.”
The acute crisis the world now faces is clearly one with many origins. No amount of hand-wringing will alter that fact, nor will self-pity change the trajectory of Corvid-19.

And no one likes having a finger pointed at them, particularly during a global crisis, but that is precisely what Mother Nature is doing.

We ignore Her at our ongoing peril.

Saturday, January 27, 2018

Wednesday, December 28, 2016

Meanwhile, As The World Fades Away

I have never seen the magnificent cheetah, and new research suggests I never will.

Read, watch, and weep at our collective folly.