The sensitivity of Betula ermanii tree-ring growth to climate variation over an altitudinal gradient
was assessed. Betula ermanii forest grows in the northern slope of Changbai Mountain from approximately
1,700mabove sea level (a.s.l.), andforms the upper tree line at nearly 2,100ma.s.l.. Six study sites were constructed
along the altitudinal gradient (1,670 to 2,010 m a.s.l.) and ring-width chronologies of Betula ermanii
were built. The mean tree-ring series intercorrelation (RBAR) increasedwith elevation. In principal component
analysis, the first unrotatedprinciple component explained77.1% of the total variance, indicating the
tree-ring growth of Beutla ermanii over the altitudinal gradient was governed by regional climate. Correlation
function analysis revealedthat the radial growth of Betula ermanii was significantly similar in response to climatic
conditions. Overall, the low temperatures during previous June, July and during the dormant period
(previous October to current May) andthe high temperatures during current June, July andAugust would
benefit the radial growth of Betula ermanii. Abundant precipitation during growing season (previous June,
July, September andcurrent August), previous November andcurrent May, wouldalso facilitate the tree-ring
growth. The reason for this uniform growth behavior in Betula ermanii remainedunclear. Betula ermanii in
Changbai Mountain formedrelatively pure stands with an open canopy, which might be partly contributing to
the common growth response to climatic signals along the altitudinal gradient, but further work was required
for testing this assumption.
Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies
Informacja
SZANOWNI CZYTELNICY!
UPRZEJMIE INFORMUJEMY, ŻE BIBLIOTEKA FUNKCJONUJE W NASTĘPUJĄCYCH GODZINACH:
Wypożyczalnia i Czytelnia Główna: poniedziałek – piątek od 9.00 do 19.00