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A new old age tree record holder was recently recognized, a Pinus longaeva growing in the White Mountains of eastern California.The date on this tree was reported to me by the late Tom Harlan.
Few Americans had online dating experience when Pew Research Center first polled on the activity in 2005, but today 15% of U. adults report they have used online dating sites or mobile dating apps.There has been a lot of focus on in the media recently about very old trees that are based on radiocarbon dating of a remnant piece of wood in association with a currently living tree and is assumed to have been an ancient stem that reproduced clonally.For example, "Old Tjikko" is a Norway spruce (Picea abies) growing in Sweden.For a crossdated age, there should be no question of the age of the portion of the tree sampled, except in any portion of the ring series not confidently crossdated with either other trees at the same site or other sites in the area.Ring-counted ages are derived by simple ring counts and may contain errors in age due to missing or false rings, suppressed areas, poorly surfaced samples, or other types of tree-ring anomalies (e.g., injuries).Online dating has jumped among adults under age 25 as well as those in their late 50s and early 60s.
The share of 18- to 24-year-olds who use online dating has roughly tripled from 10% in 2013 to 27% today."Age" in these first two types will invariably be a minimum age rather than true chronological age owing to the difficulty of sampling a tree exactly at the point of germination.Extrapolations are ages derived by regression from age/size relationships (e.g.Historical ages are based on some sort of historic reference to the tree. Hartesveldt from Ambassador of Sri Lanka in the USA, December 15, 1972).Old List contains only a single historical age, that for a Ficus religiosa at a Buddhist Temple in Anuradhapura, Sri Lanka. An individual tree may have up to two entries in the database.The living stem itself is only a few hundred years old, but there is a radiocarbon age of 9,500 years from dead wood present at its base. Mackenthun instead argues that there is no evidence of genetic continuity between the dead and living wood portions of the tree, nor is there any evidence of clonal origination of Norway spruce in general.