Тип публикации: статья из журнала
Год издания: 2022
Идентификатор DOI: 10.17516/1997-1389-0382
Ключевые слова: climatic signal, quantitative wood anatomy, scots pine (pinus sylvestris l.), tree rings
Аннотация: Semi-arid forests of continental Asia are sensitive to the moisture deficit, and, thus, tree rings in these regions can serve as long-term climatic proxies. At the same time, wood anatomy is promising for detailing the recorded climatic signal and as an indicator of the phenology of xylogenesis. In this study, we compared the sets Показать полностьюof chronologies obtained using a new method of indexing for mean and maximum values of the radial cell size, D, and the cell wall thickness, CWT, of Scots pine (Pinus sylvestris L.) from the forest-steppe habitats of Khakassia (southern Central Siberia), and southern Buryatia (Eastern Siberia), where climate is more continental and harsh. During indexing, the nonlinear dependences of D and CWT on cell number in the radial row of the ring, N, were removed to divide the climatic signal into the components recorded during the consecutive stages of xylogenesis. The stability of the N dependence was confirmed for radial growth (linear function, close to direct proportionality, R2>0.93), D, and CWT (negative exponential function with saturation, R2=0.11-0.83). The adaptation of pine wood to the climatic peculiarities of south Buryatia is evident as the smaller tracheid size but thicker cell walls compared with Khakassia. The response of radial growth and indexed cell chronologies to temperature and precipitation is similar in both regions, but in Buryatia the response to temperature is less pronounced (since the summer is cooler) and the main maxima of dendroclimatic correlations are shifted to later periods. It has been suggested that the delay in the onset of pine xylogenesis in Buryatia is rather associated with the dry weather in May-June than with lower temperatures, and during all of the growth season, phenological shifts are maintained by internal mechanisms and spatial differences between provenances. © Siberian Federal University. All rights reserved.
Журнал: Journal of Siberian Federal University - Biology
Выпуск журнала: Vol. 15, Is. 2
Номера страниц: 183-201
ISSN журнала: 19971389
Издатель: Siberian Federal University