Showing posts with label diversity. Show all posts
Showing posts with label diversity. Show all posts

Friday, April 01, 2022

Rubber and the Path to Preserving Biodiversity


 "El Sendero de la Anaconda" or the Path of the Anaconda, must be one of the most impressive documentaries I have seen recently. It is gentle, persuasive storytelling that weaves history, science and adventure to tell us about our fragile ecosystems, and the urgent need to preserve it for the future generations.

Strange as it may sound, the film does not feature any Anaconda snakes, let alone any other exotic creatures of the Amazon forests. It is instead the story of a student tracing the path taken by his teacher about 80 years ago. It is also the story of how rubber got tangled with the fate of this planet.

The teacher in this story is Prof. Richard Evans Schultes, and his student is a Canadian author named Wade Davis. Schultes is considered the father of modern ethnobotany, who is perhaps more famous among junkies of this world for his greatest popular book, "The Plants of the Gods: Their Sacred, Healing, and Hallucinogenic Powers" (1979).

A few decades before he popularised hallucinogenic concoctions such as ayahuasca, he was roped in by the US government for an important project during the second world war. In 1940, 95% of the world's rubber supply was grown in roughly 12 million acres of plantations of South East Asia.  Within six weeks of the attack on Pearl Harbour, the Japanese had seized control of literally the entire world's supply. The supply of rubber had become so crucial to the war effort that an alternative source had to be found. This source lay in the original mother lode of the rubber tree - the Amazon forests. 

However the problem was that South America is also home to the most potent fungal disease affecting this tree -- the South American Leaf Blight. It is because of this disease that the British created large rubber plantations in South East Asia (SEA), far from the Amazon basin, in areas where the fungal disease had not yet taken root. Prof. Schultes was given the task of finding a species of the rubber tree that was resistant to fungal disease,  so that rubber production could be jacked up from 50,000T a year in the Americas, to over a million tonnes, to break the Asian monopoly.

Prof. Schultes' mission in 1943 was to travel up the Vaupés River, somehow find a way overland to the headwaters of the Rio Apaporis, and then to determine the quantum of rubber that could be  extracted from the area...but as he moved overland, coming to the confluence of the Macayá and the Ajajú, he found himself the mountains of Chiribiquete, the fountain of the rivers of Colombia, where - 

An area the size of the full moon probably had 300-400 million individual rubber trees, of three different species, producing high quality latex...among them was a tree resistant to the blight and high yielding...it was like looking for a needle in a haystack...and he found it! - in the Leticia, in the homeland of the Ticunas, he found what the rubber barons would call "the real bleeders"...and with this he laid the foundation of an America based rubber industry.

All this effort came to naught however with the discovery of synthetic rubber. The US State Department took over this project, and in a fit of bureaucratic insanity, destroyed the clonal gardens. Later, better sense prevailed with the realisation that synthetic rubber just could not replace natural rubber completely.

However two developments were not anticipated - one - the radial tyre that must have natural rubber in the sidewall and the belt for strength, but even more importantly, the development of the modern airline industry. On every plane you have ever flown on, those tires are cut 100% from a tree. Only natural rubber has the qualities that allow it to go from the sub-zero temperatures of high altitude to the shock and impact of hitting the tarmac at 250 kmph, within a period of 10 minutes. Because of this we use more natural rubber than ever before and it still is derived from SEAsia from trees that are essentially genetic clones of the original seeds Wickham took out in 1877.

So, in a sense, we are now back to square one. Nearly all the rubber plantations in SEA continue to be vulnerable to fungal blight -  a single act of biological terrorism, or the accidental introduction of the spore to SEA will completely disrupt the industry. 

Hence a global effort to create a 'Path of the Anacondas' - an ecological and cultural corridor extended all the way from the Andes to the Atlantic, covering eight countries in the upper Amazon basin - Brazil , Colombia, Peru, Ecuador, Venezuela and the three Guineas.

Now, what exactly is a "cultural corridor"? Wade Davis explains this beautifully: 

Children in the Northern Americas are raised to think of mountains a piles or rock, while those in the South grow up with the belief that mountains are the abodes of spirits. These belief systems manifests itself in culture with profound ecological consequences.

Culture is not trivial; culture is not decorative; culture is not the songs we sing, the prayers we utter. Ultimately culture is about a body of moral and ethical values that we place around each individual human being, to keep at bay the barbaric heart that history so sadly teaches us lies within all of us. And so the maintenance of cultural integrity is the maintenance of civilisation itself. Cultural diversity is not an academic conceit -  it is a fundamental indication of the way things are meant to be.

"El Sendero de la Anaconda" conveys its story very effectively indeed with an engaging narrative, superb photos and drone-videos, and a haunting music score. It leaves two questions unanswered  - what happened to that fungus-resistant strain of the rubber tree discovered by Prof. Schultes ? Why has it not been used to replace all the old plantations in SEA and elsewhere?

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LINKS & REFERENCES

* Wendt, Paul (1947): The Control of Rubber in World War II - https://www.jstor.org/stable/1053336

* UNESCO World Heritage List - Chiribiquete National Park - https://whc.unesco.org/en/list/1174/




Tuesday, July 09, 2019

History - Fitting in the Genes



How old are we Indians?

This might be a silly question to ask in the age of light-speed internet. However, once you start thinking about it, you begin to realise that the question is not so silly after all. It is important precisely because half-baked analysis does indeed travel at light-speed, colouring the way we differentiate ourselves from 'others'. It becomes the basis for identity-based politics on the basis of which political power is being consolidated in our times.

Tony Joseph's book "EARLY INDIANS - The Story of Our Ancestors and Where We Came From" (Juggernaut 2018) is a bit like a probing needle that seeks to burst some of these inflated balloons of identity-based politics. Tony is a journalist makes no pretence of being a neutral observer and reporter. Scroll down his tweets (@tjoseph0010) and you realise that he has his axe to grind against the 'Hindutva Brigade' of India's right wing. But fact is that he is also a good story teller.

One generation ago, school history books told us that Radio Carbon Dating was one of the scientific tools used to unravel the story of human origins and migrations. From what we can see, despite all the scientific progress that has been made over the past 30 years, the narrative in text-books remains unchanged. Tony gathers up all the latest available scientific data, not only from RCDating but also genetics, linguistics, geology and biochemistry to tell us the story of our origins.

The main protagonists in his story are -

  • mtDNA - Mitochondrial DNA which remains outsider the nucleus, and is inherited exclusively from the mother. "If you go back 10 generations you will have 1024 people who you can call your ancestor, but your mtDNA  or Y-chromosome would have any connection with only 10 of them"
  • Y-chromosome / Y-DNA - inherited exclusively from the father.  Oldest branches in Y-chromosome are 0 A, B, CT and D
  • Gene Mutations - to create genetic family trees, and to work out the approximate time that has passed since two branches of a tree diverged
  • Haplogroups (Gk Haplo=single) - branches of the mtDNA and Y-DNa family trees -- parent branch is called 'macro-haplogroup', sub-haplogroups or "clades" refer to sub-branches. Oldest branches in mtDNA are haplogroups L0, L1, L2 and M7


The story that emerges from this wide range of sources is that even though the earliest evidence of humans habitation in India dates back to 1.5 million years, from Palaeolithic tools found at Attirampakkam in Tamil Nadu (69km from Chennai), modern humans (Homo sapiens) came in much, much later.

Mitochondrial DNA (mtDNA from females) haplogroup M2 is the most ancient one in the Indian subcontinent. This group arose around 60,200 years ago and is rarely found outside South Asia.  70-90% of mtDNA haplogroups in India can trace their origins to the First Indians who arrived in India around 65,000 years ago, while only 10-30% of remaining mtDNA lineages is from later migrations. However when it comes to paternal ancestry the tables turn. Only 10-40% of Y-chromosome haplogroups is from the First Indians while the remaining 60% came from males coming in later migrations.

Connect the dots with archeological evidence and the following timeline merges -

  • 300,000 years - remains of the modern human - Homo aspens - found in a cave in Jebel Irhoud, 50km from the city of Safi in Morocco
  • 180,000 yrs - Rock shelter in Misliya north Israel - first human fossil outside Africa
  • 70,000 yrs - Geneticists calculate Out of Africa (OoA) migration
  • 7000 BCE - Mehrgarh, agricultural settlement found at the foothills of the Bolan hills in Baluchistan
  • 7000 BCE - evidence of rice harvesting at Lahuradewa in the Sant Kabir Nagar dish of Uttar Pradesh in the Upper Ganga plain
  • 5500 - 2600 BCE - the Early Harappan era
  • 2600 - 1900 BCE - the Mature Harappan period
  • 2300-1700 BCE - the Bactria-Margiana Archaelogical Complex (BMAC) centred on the Oxus river (Amu Darya)
  • 2100 BCE - a southward migration of pastoralists from the Kazakh Steppe towards the central Asian regions...and then to South Asia


It is amazing to think that at the time of the earliest Harappan settlements in 5500 BCE, the Indian subcontinent modern humans who had been living across the country for over 60,000 years. Not only did these early settlers spread across the peninsula (at least in coastal areas), but also migrated all the way across South East Asia to Australia!

In other words, long before the Vedic Aryans migrated to India from the steppes of Central Asia, with their horses and numerous Gods, this region had been home to people who had their own unique languages and belief systems. It is the blending of all these diverse streams that makes India what it is today.

On the whole Tony Joseph's narrative is interesting but not quite convincing. It is not clear if adequate samples of mtDNA and Y-DNA were collected during the studies citied in the book. One also wonders why a book citing research papers in 2018 fails to mention the recent finding of an ancient chariot in Sanauli (Uttar Pradesh) from the Bronze-Copper Age, dating back to 2000 BCE - 1800 BCE.

How do we reconcile the absence of horse-drawn vehicles in Indus Valley civilization with their presence in the Gangetic Plains? I hope to see many more books like 'Early Indians' that unravel the mysteries in this part of the world.

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REFERENCES & LINKS

Book - Joseph, Tony (2018): EARLY INDIANS - The Story of Our Ancestors and Where We Came From, Juggernaut, New Delhi 2018

The Sanauli Charriot -  https://www.indiatoday.in/india/story/indians-used-chariots-4-000-years-ago-asi-unearths-evidence-in-up-1251650-2018-06-06