Hello Dendrochronologist! We are working in the tropical forest management issues, in which we are stuck in finding the relationship between age and growth of Shorea robusta species. We would highly appreciate your support to let us know the method for dendrochronological analysis especially incase of tropical hard wood species.
Dear Sony Baral,
Dendrchronology is rather challenging for tropical species because they usually do not produce annual growth rings.
According to the compilation of prof Grissino Mayer the potential of your Shorea robusta is low in dendrochronology
( https://repository.arizona.edu/handle/10150/262378 Grissino-Mayer, H.D. 1993. An updated list of species used in tree-ring research. Tree-Ring Bulletin 53:17-43.)
but I found a more recent study (https://www.nepjol.info/index.php/BANKO/article/view/2982) where it seems working.
In addition, hi-res stable isotopesprofiles could also help to detect annual increments even in species lacking anatomical ring boundaries (e.g. Article Identification of anatomically non-distinct annual rings in ...
and there are many other studies)Last but not least, I'd like to note that there is a dendrogroup at the BOKU (http://dendro.boku.ac.at/methoden/27.html). The head of the group is Michael Grabner. I encourage You to contact him. He is a professional dendrchronologist and , as far as I know, he has experience also with tropical species.
best wishes,
Zoltan
Hello Sony,
I just want to add another expert to Zoltáns last point.
Alexander Land (https://botanik.uni-hohenheim.de/archaeo-palaeo_dendrochronologie) is the head of the dendrochronology group at the University of Hohenheim, which is harbouring the longest dendrochronologic time series and also works (or has some experience) with tropical woods.
All the best,
Bernd
Hello Bernd and Zoltans Many thanks for your response and link which will forsure guide me!!
Hello Sony,
I congratulate you for such a huge challenge of dendrochronology in the tropic. Maybe you know these two publications about the topic but according to my oppinion they can provide you very useful information.
Good luck!
Article One hundred years of tree-ring research in the tropics - A b...
Article Dendroecology in the Tropics
Dendrochronology is easy in annual ring tree species of temperate and subtropical region. In Sal tree we not have so distinct rings so it need other methods as mention by Zoltán Kern and Bernd Berauer
Dendrochronology in tropical species is difficult and it mainly depends on annuality to form growth rings. Limited to ring porous or semi ring porous species. But shores robust is a diffuse porous species. In such cases knowledge of wood anatomy may play major role in determining age by knowing vessel density or fibre density. But it requires research in a known age of diffuse porous trees
Dear Sinha,
I highly appreciate for your suggestions with detail information about the wood anatomy. Indeed, I'm trying same for the Shorea species. However, it is difficult to know the exact age of the tree.. just citizen science need to use. From your opinion, I think I'm somehow in track.
Are you modeling tree growth based on cambial age? This should normally work.
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