Dwarf mistletoe affects whole-tree water relations of Douglas fir and western larch primarily through changes in leaf to sapwood ratios

Oecologia ◽  
2001 ◽  
Vol 126 (1) ◽  
pp. 42-52 ◽  
Author(s):  
Anna Sala ◽  
Eileen V. Carey ◽  
Ragan M. Callaway
Keyword(s):  
Water Relations ◽  
Douglas Fir ◽  
Dwarf Mistletoe ◽  
Western Larch ◽  
Whole Tree

scholarly journals Root Growth Potential and Microsite Effects on Conifer Seedling Establishment in Northern Idaho

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 597
Author(s):  
Jacob A. Reely ◽  
Andrew S. Nelson
Keyword(s):  
Root Growth ◽  
Douglas Fir ◽  
Seedling Quality ◽  
Growth Potential ◽  
Larix Occidentalis ◽  
Root Growth Potential ◽  
Western Larch ◽  
Neighborhood Conditions ◽  
Seedling Performance ◽  
Survival And Growth

Environmental conditions and seedling quality interact to produce complex patterns of seedling survival and growth. Root growth potential (RGP) is one metric of seedling quality that can be rapidly measured prior to planting, but the correlation of RGP and seedling performance is not consistent across studies. Site factors including microsite objects that cast shade and competing vegetation can also influence seedling performance. We examined the effects of RGP, presence/absence of a microsite object, and competition cover on the survival and growth of three native conifers to the Inland Northwest, USA, over 5 years. We found that RGP had no effect on the survival or growth of western larch (Larix occidentalis), Douglas fir (Pseudotsuga menziesii var. glauca), and grand fir (Abies grandis) at a mesic north aspect site and a xeric south aspect site. Comparatively, the presence of a microsite increased the odds of survival by 37% for western larch and 158% for grand fir, while the absence of forb cover increased the odds of survival of western larch by 72% and of grand fir by 26%. Douglas fir was less sensitive to microsites and competition. The strong effects of neighborhood conditions around seedlings help inform silvicultural practices to enhance the establishment of western larch and grand fir, including planting seedlings near shading objects and competition control, while these practices may not be as important for Douglas fir.

Determination of Dihydroquercetin in Douglas Fir and Western Larch Wood

1958 ◽  
Vol 30 (2) ◽  
pp. 279-281 ◽  
Author(s):  
G. M. Barton ◽  
J. A. F. Gardner
Keyword(s):  
Douglas Fir ◽  
Western Larch ◽  
Larch Wood

Whole-tree water relations of co-occurring mature Pinus palustris and Pinus elliottii var. elliottii

2011 ◽  
Vol 41 (3) ◽  
pp. 509-523 ◽  
Author(s):  
Carlos A. Gonzalez-Benecke ◽  
Timothy A. Martin ◽  
Wendell P. Cropper,
Keyword(s):  
Leaf Area ◽  
Water Use ◽  
Water Relations ◽  
Longleaf Pine ◽  
Pinus Palustris ◽  
Pinus Elliottii ◽  
Hydraulic Conductance ◽  
Slash Pine ◽  
Southeastern Us ◽  
Whole Tree

The natural range of longleaf pine ( Pinus palustris P. Mill.) and slash pine ( Pinus elliottii var. elliottii Engelm.) includes most of the southeastern US Coastal Plain, and there is now considerable interest in using these species for ecological forestry, restoration, and carbon sequestration. It is therefore surprising that little information is currently available concerning differences in their ecological water relations in natural stands. In this study, we compared water use, stomatal conductance at the crown scale (Gcrown), and whole-tree hydraulic conductance of mature pine trees growing in a naturally regenerated mixed stand on a flatwoods site in north-central Florida. We found remarkable similarities between longleaf and slash pine in stored water use, nocturnal transpiration, and whole-tree hydraulic conductance. Mean daily transpiration rate was higher for slash than for longleaf pine, averaging 39 and 26 L·tree–1, respectively. This difference was determined by variations in tree leaf area. Slash pine had 60% more leaf area per unit basal sapwood area than longleaf pine, but the larger plasticity of longleaf pine stomatal regulation partially compensated for leaf area differences: longleaf pine had higher Gcrown on days with high volumetric water content (θv) but this was reduced to similar or even lower values than for slash pine on days with low θv. There was no species difference in the sensitivity of Gcrown to increasing vapor pressure deficit.

Effects of variations in stand structure on development of mixed-species stands in eastern Washington

1993 ◽  
Vol 23 (3) ◽  
pp. 545-552 ◽  
Author(s):  
David F. Cobb ◽  
Kevin L. O'hara ◽  
Chadwick D. Oliver
Keyword(s):  
Stand Structure ◽  
Lodgepole Pine ◽  
Douglas Fir ◽  
Cascade Range ◽  
Stand Development ◽  
Mixed Species ◽  
Western Larch ◽  
Development Patterns ◽  
Large Numbers ◽  
Eastern Washington

The development of six mixed-species, even-aged stands was reconstructed in the eastern Washington Cascade Range. All stands were within the Grand Fir Climax Series and began following stand replacement disturbances. Western larch (Larixoccidentalis Nutt.) and lodgepole pine (Pinuscontorta Dougl. ex Loud.), when present, formed an upper stratum over interior Douglas-fir (Pseudotsugamenziesii var. glauca (Beissn.) Franco) and grand fir (Abiesgrandis (Dougl.) Lindl.) in all six stands. Establishment patterns and species composition affected stand development patterns. Douglas-fir benefitted from the absence of lodgepole pine; grand fir benefitted from the absence of Douglas-fir, but apparently not from the absence of lodgepole pine. Lodgepole pine had faster initial diameter growth rates than western larch when it became established relatively early and in large numbers.

The canopy water relations of old-growth Douglas-fir trees

Trees ◽  
1999 ◽  
Vol 13 (4) ◽  
pp. 211 ◽  
Author(s):  
W. L. Bauerle ◽  
T. M. Hinckley ◽  
J. Cermak ◽  
J. Kucera ◽  
K. Bible
Keyword(s):  
Water Relations ◽  
Douglas Fir ◽  
Old Growth ◽  
Canopy Water

Whole-tree water relations of western gall rust infected lodgepole pine trees

2009 ◽  
Vol 31 (3) ◽  
pp. 330-339 ◽  
Author(s):  
J.M. Wolken ◽  
P.V. Blenis ◽  
M.F. Dyck
Keyword(s):  
Water Relations ◽  
Lodgepole Pine ◽  
Pine Trees ◽  
Whole Tree
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