It is difficult to directly attribute an age to mangrove trees using classic dendrochronological methods
- because these species usually lack datable growth rings
- When these growth rings exist our observations show that their irregular growth and structure do not allow them to be counted precisely and their numbers to be correlated with the ages of the individuals.
So, does anyone knows how to use radiogenic isotopes on wood like for sediments, to estimate tree age ?
Best,
Dear Romain,
typically Pb210 and Cs137 has been used to study and date sedimantation. Thus, both isotopes need to be incorporated into a plant (e.g. stem) and thus, may not directly reflect any fall out (i.e. source of Cs137) and Pb210 back ground (Ra226 decay). Therefore, I think you may potentially use, but you should know Cs137 and Pb210 uptake rate and pathways in mangrove trees (...I doupt that this in known).
Just a note: At the University at Göttingen in Germany a globally accepted tree ring expert works. He (Dr. Martin Worbes) studied also mangrove tree rings and their formation in accordance to XYZ. I am convinced that he may assist in assessing age of your trees.
Best
Nils
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