Amazing stuff!
Notice that this research perhaps confirms there were other warm climatic periods on Earth (different from the Medieval Warm Period) perhaps predating human civilization. Global Warming is a hoax and Climate Change is a religion! Perhaps the sun and its solar activity and cycles not greenhouse (trace) gases mostly determine warmer and colder periods on Earth!
"Now, a Nature Geoscience study suggests Blood Falls also preserves biological clues to Antarctica’s past. Researchers found molecular evidence of an active, marine-derived community of microscopic eukaryotes — organisms whose cells have a nucleus — near the Taylor Glacier terminus, pointing to ancient seawater that may have entered the valley during warmer periods before becoming sealed beneath ice. ..."
From the abstract:
"The McMurdo Dry Valleys contain a mosaic of specialized microbial habitats structured by strong physical and chemical gradients.
Blood Falls, located at the terminus of the Taylor Glacier, is a red, iron-rich outflow of deep Antarctic subglacial brine with geochemical and isotopic evidence supporting a potential ancient marine origin.
Previous studies suggest the brine formed when seawater inundated the Taylor Valley over warm climatic intervals before becoming isolated beneath the advancing glacier.
Here, across 167 aquatic, sediment and aeolian samples from the McMurdo Dry Valleys and marine reference sites, we identified a distinct marine micro-eukaryotic assemblage restricted to red-hued ice, mud and sediment at the Taylor Glacier terminus.
Marine indicator species were identified across several phylogenetic groups including diatoms, haptophytes, dinoflagellates and ciliates.
Metatranscriptomic profiles revealed transcriptionally active phototrophs with enriched pathways for photosynthesis, osmotic stress responses and cellular repair. Haplotype networks showed lineage-specific divergence between Taylor Glacier terminus and McMurdo Sound diatoms, supporting geographic isolation.
These findings indicate that the subglacial brine-fed system at the Taylor Glacier terminus retains marine-derived biological signatures long after physical separation from the ocean, linking contemporary Antarctic microbial assemblages to past climatic transitions."
Ancient marine life may be hiding in Antarctica’s Blood Falls (original news release) "Blood Falls has long been one of Antarctica’s strangest landmarks: a red-stained outflow that spills from the face of Taylor Glacier into the cold, dry landscape of the McMurdo Dry Valleys. The color comes from iron-rich brine that has been trapped beneath the glacier, isolated from the outside world and periodically released into the polar desert."
Molecular evidence for a relict marine community in an Antarctic Dry Valleys subglacial brine-fed system (open access)
The research team collects samples at Blood Falls in 2023.
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