Static and dynamic maximum size–density relationships for mixed trembling aspen and white spruce stands in western Canada

2013 ◽  
Vol 289 ◽  
pp. 300-311 ◽  
Author(s):  
Valentin Reyes-Hernandez ◽  
Philip G. Comeau ◽  
Mike Bokalo
Keyword(s):  
Maximum Size ◽  
White Spruce ◽  
Western Canada ◽  
Trembling Aspen ◽  
Spruce Stands

Distribution of white spruce lateral fine roots as affected by the presence of trembling aspen: root mapping using simple sequence repeat DNA profiling

2012 ◽  
Vol 42 (8) ◽  
pp. 1566-1576 ◽  
Author(s):  
Derek Joseph Lawrence ◽  
N. Luckai ◽  
W.L. Meyer ◽  
C. Shahi ◽  
A.J. Fazekas ◽  
...  
Keyword(s):  
Simple Sequence Repeat ◽  
White Spruce ◽  
Trembling Aspen ◽  
Soil Layers ◽  
Repeat Dna ◽  
Spruce Stands ◽  
Dna Profiles ◽  
Simple Sequence ◽  
Simple Sequence Repeat Dna ◽  
Mixedwood Stands

Mixedwood forests of white spruce ( Picea glauca (Moench) Voss) and trembling aspen ( Populus tremuloides Michx.) may possess ecological advantages over monospecific white spruce stands. Belowground competition may be reduced through vertically stratified roots; facilitation of growth may occur in upper soil layers through nutrient-rich trembling aspen litterfall. These effects may incentivize white spruce to preferentially exploit upper soil layers in mixedwood stands, resulting in wider root systems. This research contrasted white spruce fine root (diameter <2 mm) distributions in organic layers of white spruce and mixedwood stands. Research occurred at the Fallingsnow Ecosystem Project site in northwestern Ontario. Eighteen plots represented mixedwood and pure white spruce stands. Trees were mapped; foliage and root samples were collected. Roots were separated by species and scanned to determine length. Simple sequence repeat DNA profiles were determined for all white spruce trees and for 45 white spruce root fragments per plot. Root and tree DNA profiles were matched; corresponding distances were calculated. Most (80%) root fragments were within 3.2 m of tree stems. Root prevalence decreased rapidly with distance. Organic layer pH was significantly less acidic in mixedwood plots, but only in one block. A subtle significant trend towards wider root distributions occurred in mixedwood stands.

scholarly journals Modelling Growth-Competition Relationships in Trembling Aspen and White Spruce Mixed Boreal Forests of Western Canada

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e77607 ◽  
Author(s):  
Jian-Guo Huang ◽  
Kenneth J. Stadt ◽  
Andria Dawson ◽  
Philip G. Comeau
Keyword(s):  
Boreal Forests ◽  
White Spruce ◽  
Western Canada ◽  
Trembling Aspen

Aboveground biomass production and nutrient accumulation on postharvested white spruce sites in interior Alaska

1993 ◽  
Vol 23 (6) ◽  
pp. 1233-1239 ◽  
Author(s):  
David Paré ◽  
Keith Van Cleve
Keyword(s):  
Nutrient Cycling ◽  
Biomass Production ◽  
Aboveground Biomass ◽  
Nutrient Content ◽  
White Spruce ◽  
Trembling Aspen ◽  
Total N ◽  
Clear Cutting ◽  
Aboveground Production ◽  
Spruce Stands

Nutrient content and biomass of aboveground annual production, and nutrient content of total aboveground biomass, of 14-year-old assemblages of plants developing on harvested white spruce (Piceaglauca (Moench) Voss) sites were estimated by vegetation harvesting and compared with values previously measured in mature white spruce stands. The aboveground biomass production of 14-year-old regenerating trembling aspen (Populustremuloides Michx.) clumps was 3 times higher than the aboveground production of mature white spruce stands, while the aboveground production of other regenerating communities was lower or equivalent to the production of mature white spruce. However, the nutrient content of aboveground current biomass was greater in all regenerating communities than in mature white spruce stands, except on regenerating sites where the forest floor was absent. The amount of nutrient incorporated in current aboveground biomass was 5 times greater in trembling aspen clumps than in mature white spruce stands. Furthermore, the total N, P, and K content of aboveground vegetation corresponded, in 14-year-old trembling aspen clumps, to a value that ranged from 50 to 109% of the amount found in the aboveground biomass of mature white spruce forests, while this value ranged from 4 to 14% on other regeneration types. Trembling aspen and balsam poplar (Populusbalsamifera L.) both showed the greatest concentrations of N and P in foliar litter fall. These observations suggest that the development of a trembling aspen clump after clear-cutting contributes to the acceleration of nutrient cycling. On the other hand, the development of herbaceous communities during the same period after clear-cutting was accompanied by much lower nutrient cycling rates in the aboveground portion of the vegetation.

Recent climatic drying leads to age-independent growth reductions of white spruce stands in western Canada

2017 ◽  
Vol 23 (12) ◽  
pp. 5297-5308 ◽  
Author(s):  
Edward H. Hogg ◽  
Michael Michaelian ◽  
Trisha I. Hook ◽  
Michael E. Undershultz
Keyword(s):  
White Spruce ◽  
Western Canada ◽  
Spruce Stands ◽  
Age Independent

scholarly journals The Influence of Stocking and Stand Composition on Productivity of Boreal Trembling Aspen-White Spruce Stands

Forests ◽  
2015 ◽  
Vol 6 (12) ◽  
pp. 4573-4587 ◽  
Author(s):  
Valentín Reyes-Hernández ◽  
Philip Comeau
Keyword(s):  
White Spruce ◽  
Trembling Aspen ◽  
Spruce Stands

The interactive effect of competition and climate on growth of boreal tree species in western Canada and Alaska

2020 ◽  
Vol 50 (5) ◽  
pp. 457-464 ◽  
Author(s):  
Felix O. Oboite ◽  
Philip G. Comeau
Keyword(s):  
Interspecific Competition ◽  
Tree Growth ◽  
Intraspecific Competition ◽  
Tree Species ◽  
Basal Area ◽  
White Spruce ◽  
Jack Pine ◽  
Western Canada ◽  
Trembling Aspen ◽  
Balsam Poplar

Understanding interactions between competition and climate in relation to their effects on individual tree growth is crucial to the development of climate-sensitive growth models required for modelling boreal forest succession in a changing climate. We used data from permanent growth and yield sample plots in western Canada and Alaska to investigate the impact of competition within a regional gradient of climatic conditions for lodgepole pine (Pinus contorta Douglas ex Loudon), jack pine (Pinus banksiana Lamb.), trembling aspen (Populus tremuloides Michx.), balsam poplar (Populus balsamifera L.), white spruce (Picea glauca (Moench) Voss), and black spruce (Picea mariana (Mill.) Britton, Sterns & Poggenb.). We characterized the effects of competition (basal area of spruce–fir, deciduous, and pine trees larger than the focal tree) and climate (mean annual temperature and precipitation) and their interactions on basal area growth of individual trees using linear mixed-effects models. Our results indicated that intraspecific competition had stronger effects on growth than interspecific competition and climate. Moreover, significant interactions between intraspecific competition and climate suggest that an increase in intraspecific competition will lead to a reduction in tree growth for warmer regions (lodgepole pine, trembling aspen, balsam poplar, and white spruce) and wetter regions (jack pine). The manner in which interspecific competition altered tree growth responses to climate was variable, depending on tree species and competition type. These results indicate that the relationships between growth and climate may differ according to the degree of competition and the structure of the stand.

Variation in response to declining photoperiod among families and stands of white spruce in southeastern Ontario

1979 ◽  
Vol 9 (4) ◽  
pp. 443-448 ◽  
Author(s):  
D. F. W. Pollard ◽  
C. C. Ying
Keyword(s):  
White Spruce ◽  
Adaptive Strategy ◽  
Height Increment ◽  
Base Population ◽  
Local Climate ◽  
The Family ◽  
Family Level ◽  
Spruce Stands ◽  
Controlled Environments ◽  
Free Growth

Newly germinated seedlings of 66 open-pollinated white spruce Piceaglauca (Moench) Voss families from 11 native stands in southeastern Ontario were investigated for responses to declining photoperiod under controlled environments. Amount of height increment (free growth) during a period of declining photoperiod was studied. Variation in duration of free growth was found mostly associated with the family-within-stand component. The stand effect was negligible and decreased as seedlings aged. Lack of stand differentiation suggests that white spruce stands in. southeastern Ontario may have originated from the same base population. High genetic variation at the family level may reflect an adaptive strategy to cope with the extremely variable local climate.

Retention patch size and conservation of saproxylic beetles in boreal white spruce stands

2015 ◽  
Vol 358 ◽  
pp. 98-107 ◽  
Author(s):  
Seung-Il Lee ◽  
John R. Spence ◽  
David W. Langor ◽  
Jaime Pinzon
Keyword(s):  
Patch Size ◽  
White Spruce ◽  
Saproxylic Beetles ◽  
Spruce Stands
Sign in / Sign up

Export Citation Format

Share Document