Climate and annual ring growth of black spruce in some Alberta peatlands

Abstract

DANG, Q. L., and LIEFFERS, V. J. 1989. Climate and annual ring growth of black spruce in some Alberta peatlands. Can. J.Bot. 67: 1885-1889. The long-term relationship between climate and tree-ring growth in black spruce (Picea mariana (Mill.) B.S.P.) was determined in two peatland sites near Slave Lake, Alberta. At each site, 15 dominant-codominant black spruce were sampled for tree-ring growth at 30 cm height. The tree-ring indices for each site were related to precipitation and temperature data from Slave Lake. It was found that (i) tree-ring indices were positively correlated with June-August precipitation of the current year and of the 1st and 2nd years prior to the current year; (ii) June-August maximum temperatures of the current year and of the 1st and 2nd years prior to the current year were negatively correlated with tree-ring indices; (iii) tree-ring indices had a positive linear correlation with the June-August minimum temperature of the current year and polynomial correlations with June-August minimum temperatures of the 1st and 2nd years prior to the current year; and (iv) summer precipitation values greater than 325 mrn probably had a negative impact upon the tree-ring growth. Maximum and minimum temperatures, however, were intercorrelated with precipitation. DANG, Q. L., et LIEFFERS, V. J. 1989. Climate and annual ring growth of black spruce in some Alberta peatlands. Can. J. Bot. 67 : 1885-1889. La relation ?i long terme entre le climat et la croissance des anneaux annuels chez 1'Cpinette noire (Picea mariarza (Mill.) B.S.P.) fut determinte i deux stations d'une tourbikre prks du lac des Esclaves, en Alberta. A chaque station, 15 tpinettes noires dominantes-codominantes furent Cchantillonntes ?i 30 cm de hauteur en vue d'obsemer la croissance des anneaux annuels. Les indices de croissance des anneaux ?i chaque station furent relits aux donnees de prtcipitation et de tempkrature. L'on a trouvt que (i) les indices correlis positivement ?i la prtcipitation de juin-aoQt de l'annCe en cours et de la premikre et de la deuxikme anntes antkrieures ?i celle en cours; (ii) les temptratures maximales de juin-aoQt de l'annCe en cours et de la premikre et de la deuxikme annkes anterieures i l'annte en cours sont correltes ntgativement aux indices; (iii) les indices ont une correlation linCaire positive avec la temptrature minimale de juin-aoQt de l'annte en cours, et des corrtlations polynomiales avec les temperatures minimales de juin-aoQt de la premikre et de la deuxikme annees antkrieures i l'annte en cours; et (iv) les valeurs de prtcipitation estivale plus tlevCes que 325 mm ont probablement un impact ntgatif sur la croissance des anneaux annuels. Les temptratures maximales et minimales, cependant, sont intercorreltes avec la precipitation. Mots c l b : dendrochronologie, climat, anneaux annuels, tourbikre, bourbier. [Traduit par la revue]

Wetland succession in a permafrost collapse: interactions between fire and thermokarst

“…8; Wilmking and Myers-Smith, 2008) to drought-inhibited growth. Although this poorly drained forest seems an unlikely candidate to experience significant plant drought stress, the combination of root systems limited by a shallow active layer and rapid fluctuations in the water table may lead to periods of reduced water availability (Dang and Lieffers, 1989). Annual growth in Western Canadian black spruce stands has previously be shown to be negatively correlated with temperature and positively correlated with precipitation (Dang and Lieffers, 1989;Brooks et al, 1998).…”

“…Although this poorly drained forest seems an unlikely candidate to experience significant plant drought stress, the combination of root systems limited by a shallow active layer and rapid fluctuations in the water table may lead to periods of reduced water availability (Dang and Lieffers, 1989). Annual growth in Western Canadian black spruce stands has previously be shown to be negatively correlated with temperature and positively correlated with precipitation (Dang and Lieffers, 1989;Brooks et al, 1998). In Interior Alaskan white spruce (Picea glauca) treering width, 13 C and maximum latewood density was shown to be an indicator of tree growth response to temperatureinduced drought stress (Barber et al, 2000).…”

Development of alder carr after the abandonment of wet grasslands during the last 70 years

“…Usually, climate was observed as the key unifying factor determining the growth variability within a large geographical range in stands of mesophilous and dry forests (e.g., Baillie, 1995;Peterson and Peterson, 2001). However, several dendroclimatological studies showed a relatively weak relationship between the annual radial growth of trees and the climate in wetlands, characterised by specific and changeable local conditions (Dang and Lieffers, 1989;Linderholm, 1999;Linderholm and Leine, 2004). We suggest that the growth of A. glutinosa has been affected mainly by local environmental factors, which may also have modified growth responses to key climatic variables over time.…”

Dynamique et croissance de vieux peuplements d'épinettes noires (Picea mariana) entre les 51ième et 52ième degrés de latitude nord au Québec /

“…Certains auteurs mentionnent que les températures en fin de printemps et du début de l'été ont un effet positif sur la croissance annuelle (D'Arrigo et al, 1992 ;Hofgaard et al, 1999 ;Schweingruber et al, 1993). D'autres auteurs indiquent plutôt que les températures pour les mêmes périodes ont des effets négatifs (Archambault et Bergeron, 1992 ;Brooks et al, 1998 ;Dang et Lieffers, 1989). Chez l'épinette noire les précipitations au début de l'été auraient un effet positif sur la croissance annuelle (Deslauriers et al, 2003a ;Brooks et al, 1998 ;Dang et Lieffers, 1989 ;Hofgaard et ai., 1999).…”

“…D'autres auteurs indiquent plutôt que les températures pour les mêmes périodes ont des effets négatifs (Archambault et Bergeron, 1992 ;Brooks et al, 1998 ;Dang et Lieffers, 1989). Chez l'épinette noire les précipitations au début de l'été auraient un effet positif sur la croissance annuelle (Deslauriers et al, 2003a ;Brooks et al, 1998 ;Dang et Lieffers, 1989 ;Hofgaard et ai., 1999). Établir un lien direct entre des températures plus froides et une diminution de la croissance chez les arbres en milieu boréal est donc difficile à faire.…”