Rainfall driven variations in δ13C and wood anatomy of Breonadia salicina trees from South Africa between AD1375 and 1995
2005 (English)In: South African Journal of Science, ISSN 0038-2353, Vol. 101, no 3/4, 162-168 p.Article in journal (Refereed) Published
This study demonstrates the potential of deriving palaeoenvironmental information from carbon isotope composition (δ<sup>13</sup>C) and wood anatomy properties along the growth radii of two Breonadia salicina trees from Limpopo province, South Africa. An age model, based on AMS dating and 'wiggle-match' dating of the wood, shows that the data series from the two trees span AD 1375-1995 and 1447-1994, respectively. Shifts in the trees' δ<sup>13</sup>C composition and wood anatomy resemble the indications of climate change observed in regional palaeoclimatic studies, and the parts of the B. salicina record from the last century show similarities with the observed variations in annual rainfall in the region. We propose that changes in carbon isotope composition and wood anatomy indicate variations in regional rainfall during the period of tree growth. Both the δ<sup>13</sup>C and the wood anatomy records of B. salicina signify dry conditions in the early 1400s, mid-1500s, 1700s and early 1900s. The wettest conditions were during the late 1400s and in the 1600s.
Place, publisher, year, edition, pages
2005. Vol. 101, no 3/4, 162-168 p.
IdentifiersURN: urn:nbn:se:su:diva-24703OAI: oai:DiVA.org:su-24703DiVA: diva2:198145
Part of urn:nbn:se:su:diva-73752008-02-252008-02-152012-05-07Bibliographically approved