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Demise of nine out of 13 of the ancient landmarks linked to climate change by researchers

A baobab tree in South Africa. Photograph: Alamy

Some of Africa’s oldest and biggest baobab trees have abruptly died, wholly or in part, in the past decade, according to researchers.

The trees, aged between 1,100 and 2,500 years and in some cases as wide as a bus is long, may have fallen victim to climate change, the team speculated.

“We report that nine of the 13 oldest … individuals have died, or at least their oldest parts/stems have collapsed and died, over the past 12 years,” they wrote in the scientific journal Nature Plants, describing “an event of an unprecedented magnitude”.

“It is definitely shocking and dramatic to experience during our lifetime the demise of so many trees with millennial ages,” said the study’s co-author Adrian Patrut of the Babeș-Bolyai University in Romania.

Among the nine were four of the largest African baobabs. While the cause of the die-off remains unclear, the researchers “suspect that the demise of monumental baobabs may be associated at least in part with significant modifications of climate conditions that affect southern Africa in particular”.

Further research is needed, said the team from Romania, South Africa and the United States, “to support or refute this supposition”.

Between 2005 and 2017, the researchers probed and dated “practically all known very large and potentially old” African baobabs – more than 60 individuals in all. Collating data on girth, height, wood volume and age, they noted the “unexpected and intriguing fact” that most of the very oldest and biggest trees died during the study period. All were in southern Africa – Zimbabwe, Namibia, South Africa, Botswana, and Zambia.

The baobab is the biggest and longest-living flowering tree, according to the research team. It is found naturally in Africa’s savannah region and outside the continent in tropical areas to which it was introduced. It is a strange-looking plant, with branches resembling gnarled roots reaching for the sky, giving it an upside-down look.

The iconic tree can live to be 3,000 years old, according to the website of the Kruger National Park in South Africa, a natural baobab habitat.

The tree serves as a massive store of water, and bears fruit that feeds animals and humans. Its leaves are boiled and eaten as an accompaniment similar to spinach, or used to make traditional medicines, while the bark is pounded and woven into rope, baskets, cloth and waterproof hats.

The purpose of the study was to learn how the trees become so enormous. The researchers used radiocarbon dating to analyse samples taken from different parts of each tree’s trunk. They found that the trunk of the baobab grows from not one but multiple core stems. According to the Kruger Park, baobabs are “very difficult to kill”.

“They can be burnt, or stripped of their bark, and they will just form new bark and carry on growing,” it states. “When they do die, they simply rot from the inside and suddenly collapse, leaving a heap of fibres.”

Of the 10 trees listed by the study authors, four died completely, meaning all their multiple stems toppled and died together, while the others suffered the death of one or several parts.

The oldest tree by far, of which all the stems collapsed in 2010/11, was the Panke tree in Zimbabwe, estimated to have existed for 2,500 years. The biggest, dubbed Holboom, was from Namibia. It stood 30.2 metres (99 feet) tall and had a girth of 35.1 m.

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oh, this is a mighty event ....so grateful for your telling us about it, Luna... I am bereft!  Here's why... 

nine years ago, when we [Ruth and I] were returning from an exploratory mission to examine the land that would become Edenhope Nature Preserve ...and were following the guides from Tasmate village who took us to this forested place they had offered us ....I felt some tugging on my shoulder... turning my head, there was no one behind me. So I continued a few more steps and it happened again, this time more insistently. This time I turned fully around,;. It was a tree some 15 meters away - i don't even remember what kind of tree - that had expressed this attention upon me. Then, with a great voice that no one else could hear, came "I Love You..."

I walked back to it [Him] ...and threw my arms around his strong body ...and told him I love him too.... this event - needless to say - changed my life. The trees are as much my family now as those with whom I share flesh and blood.  He is my brother forever more...

∼ Amazing story indeed, Stephen...I am a tree-lover too ∼

the whole point of it all ...can best be appreciated if only we can ...remember to love.

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