An unlimited prehistoric panorama now hidden beneath the North Sea might have supported forests and wildlife hundreds of years sooner than scientists beforehand believed.
New analysis means that Doggerland, a landmass that after linked Britain to mainland Europe, might have been a hospitable setting for vegetation, animals, and probably early human communities effectively earlier than forests unfold broadly throughout Britain and northern Europe.
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The research, led by researchers at the University of Warwick and printed in Proceedings of the National Academy of Sciences (PNAS), used sedimentary ancient DNA (sedaDNA) to reconstruct Doggerland’s setting in unprecedented element.
By analysing genetic traces preserved in marine sediments, scientists have been capable of establish plant species that lived there from the finish of the final Ice Age till rising seas ultimately submerged the panorama.
The findings reveal that temperate woodland species reminiscent of oak, elm, and hazel have been already current in southern Doggerland greater than 16,000 years in the past — a number of thousand years sooner than indicated by pollen data from mainland Britain. Researchers additionally detected DNA from lime (Tilia), a warmth-loving tree species, showing round 2,000 years sooner than beforehand recorded in Britain.
Perhaps most stunning was the discovery of genetic traces belonging to Pterocarya, a walnut-related tree thought to have vanished from north-western Europe roughly 400,000 years in the past. The presence of this species suggests it could have survived in the area far longer than scientists had assumed.
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To uncover these insights, researchers analysed 252 sediment samples taken from 41 marine cores alongside a prehistoric river system referred to as the Southern River. The sediments, which collected over hundreds of years, preserved fragments of ancient DNA that allowed scientists to reconstruct the ecological historical past of Doggerland from roughly 16,000 years in the past till its ultimate submergence beneath the North Sea.
Professor Robin Allaby at the School of Life Sciences, University of Warwick and lead creator of this research says: “By analysing sedaDNA from Southern Doggerland at a scale not seen before, we have reconstructed the environment of this lost land from the end of the last Ice Age until the North Sea arrived. We unexpectedly found trees thousands of years earlier than anyone expected — and evidence that the North Sea fully formed later than previously thought.
“From a human perspective, this is the best evidence that Doggerland’s wooded environment could have supported early Mesolithic communities prior to flooding and may help explain why relatively little early Mesolithic evidence survives on mainland Britain today.”
The analysis additionally challenges earlier assumptions about when Doggerland disappeared.
Evidence from the DNA report suggests components of the panorama remained above water even after main flooding occasions, together with the Storegga tsunami round 8,150 years in the past. Some areas might have survived as dry land till as just lately as 7,000 years in the past.
The research helps rising evidence that small-scale “microrefugia” allowed temperate plant species to outlive northern Europe’s Ice Age circumstances, serving to clarify Reid’s Paradox — how bushes recolonised the area so quickly after the final Ice Age retreated.
The presence of woodland habitats so early in Doggerland’s historical past additionally raises new questions on the area’s significance for prehistoric people. Forest ecosystems might have supported animals reminiscent of wild boar and different recreation, probably offering wealthy sources for early Mesolithic communities lengthy earlier than the better-known Maglemosian tradition emerged round 10,300 years in the past.
Co-author, Professor Vincent Gaffney at University of Bradford says, “For many years, Doggerland was often described as a land bridge – only significant as a route for prehistoric settlement of the British Isles. Today, we understand that Doggerland was not only a heartland of early human settlement, but also that the presence of the land mass may have provided a refuge for plants and animals and acted as a fulcrum for how prehistoric communities settled and resettled northern Europe over millennia.”
As scientists proceed to research the North Sea’s submerged landscapes, Doggerland is more and more rising not as a easy migration route, however as a thriving ecosystem that performed an important position in the environmental and human historical past of Ice Age Europe.
Header Image Credit : University of Bradford Submerged Landscape & Research Centre
Sources : University of Warwick – https://doi.org/10.1073/pnas.2508402123
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