{"id":327837,"date":"2024-05-11T17:26:01","date_gmt":"2024-05-11T15:26:01","guid":{"rendered":"https:\/\/climatescience.press\/?p=327837"},"modified":"2024-05-11T17:26:04","modified_gmt":"2024-05-11T15:26:04","slug":"dna-evidence-reveals-domestic-cats-dogs-african-wildcats-frogs-lived-in-the-arctic-9000-years-ago","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=327837","title":{"rendered":"DNA Evidence Reveals Domestic Cats, Dogs, African Wildcats, Frogs Lived In The Arctic 9000 Years Ago"},"content":{"rendered":"\n
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From NoTricksZone<\/a><\/p>\n\n\n\n

By\u00a0Kenneth Richard<\/a><\/em><\/p>\n\n\n\n

A\u00a0new study<\/a>\u00a0finds warmth-demanding species could survive in the Holocene Arctic (northern Norway) hundreds to thousands of km north of where they reside today. This affirms temperatures were \u201chigher than today\u201d with much less snow and ice back then.<\/strong><\/p>\n\n\n\n

DNA evidence from a site north of the Arctic Circle indicates African wildcat (Felis lybica<\/em>) used to reside in Arctic climates when CO2 levels were under 260 ppm, or at supposedly \u201csafe\u201d levels. The authors suggest this is a \u201cremarkable\u201d finding, as it is the \u201chighest latitude location for this species ever.\u201d<\/p>\n\n\n\n

The presence of domestic cats (Felis catus<\/em>) and European wildcats (Felis silverstris<\/em>) in this region is also validated by 100% matching DNA evidence. Wildcat species became extinct in northern Europe after the Holocene Thermal Maximum (HTM) ended and \u201csnow cover increased above the wildcat threshold of 20 cm over a 100-day period.\u201d<\/p>\n\n\n\n

Amberjacks (Seriola<\/em>) \u2013 a fish species only found in temperate to tropical Pacific and Atlantic waters (Gulf of Mexico, Brazil) today \u2013 also lived north of the Arctic Circle during the Early Holocene.<\/p>\n\n\n\n

Dogs (wolves), ducks, geese, prairie chickens, gulls, brown bear, and several species of frogs (no longer present in the Arctic today) also found the Arctic climate temperate enough to reside in northern Norway in the millennia centering around 9000 years before present.<\/p>\n\n\n\n

The presence of mussel shells at much higher elevations indicate sea levels were ~90 m higher than today 13,000 to 12,000 years ago in this region (due mostly to uplift), falling to ~57 m higher than present between 9500 and 9000 years ago and then gradually declining to the present.<\/p>\n\n\n\n

The authors suggest the DNA-confirmed presence of these species north of the Arctic Circle \u2013 much further north of where they can survive today \u2013 is evidence that warming periods and borealization were \u201ca naturally recurring phenomenon in the past.\u201d<\/p>\n\n\n\n

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Image Source:\u00a0Boilard et al., 2024<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

DNA analysis of species remains has become an insightful way to analyze past variations in climate. Another recent DNA database study (Kjaer et al., 2022<\/a><\/strong>) published in\u00a0Nature<\/em>\u00a0indicated the High Arctic at 82\u00b0N (north of Greenland) was 11-19\u00b0C warmer than today 2 million years ago. This warmth allowed coral reefs, green algae, and horseshoe crab to reside in the Arctic Ocean at 82\u00b0N. Today horseshoe crab cannot occupy waters north of 45\u00b0N due to the much cooler ocean temperatures.<\/p>\n\n\n\n

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Image Source:\u00a0Kjaer et al., 2022<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n
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