scholarly journals Distribution of the Balsam Woolly Adelgid in Idaho

2000 ◽  
Vol 15 (4) ◽  
pp. 227-231 ◽  
Author(s):  
R.L. Livingston ◽  
J.E. Dewey ◽  
D.P. Beckman ◽  
L.E. Stipe
Keyword(s):  
North America ◽  
High Elevation ◽  
The State ◽  
Abies Lasiocarpa ◽  
Subalpine Fir ◽  
Northeastern North America ◽  
Aerial Surveys ◽  
Host Type ◽  
Ecological Values ◽  
Balsam Woolly Adelgid

Abstract The balsam woolly adelgid (Adelges piceae) was introduced from Europe to northeastern North America in about 1900. In 1983, it was discovered infesting fir trees in Idaho. Since then, aerial and ground surveys have documented its spread in Idaho over an area of approximately 14,000 mi2 (8,960,000 ac). It now covers most of the central one-third of the state. Aerial surveys in 1997 and 1998 identified about 125,000 ac of host type with dead or damaged trees. Subalpine fir (Abies lasiocarpa) is a critical species in many high elevation areas. The effects of the balsam wooly adelgid on aesthetics, hydrology, and other ecological values can be very important. The adelgid is likely to continue its spread throughout subalpine fir forests of Idaho and neighboring states. West. J. Appl. For. 15(4):227-231,

Effect of gap size on litter decomposition and soil nitrate concentrations in a high-elevation spruce–fir forest

2003 ◽  
Vol 33 (11) ◽  
pp. 2210-2220 ◽  
Author(s):  
Cindy E Prescott ◽  
Graeme D Hope ◽  
Leandra L Blevins
Keyword(s):  
Forest Floor ◽  
Mineral Soil ◽  
High Elevation ◽  
N Availability ◽  
Abies Lasiocarpa ◽  
Subalpine Fir ◽  
Engelmann Spruce ◽  
Nitrate Losses ◽  
Nitrate Concentrations ◽  
High Elevation Forest

Possible mitigation of nitrate losses associated with clearcuts through harvesting smaller gaps was tested in a high-elevation forest of Engelmann spruce (Picea engelmannii Parry ex Engelm.) and subalpine fir (Abies lasiocarpa (Hook.) Nutt.). We measured concentrations of ammonium and nitrate after 6-week buried bag incubations of forest floor and mineral soil samples in replicated plots of uncut forest and gaps of 10, 1.0, and 0.1 ha and single-tree removal for 7 years after harvest. Nitrate concentrations in forest floor and mineral soil were elevated 3–7 years after harvesting in gaps of 0.1 ha and larger. Removal of the same proportion of trees as single trees did not result in increased nitrate concentrations, suggesting that nitrate losses could be reduced by harvesting single trees rather than creating gaps. Greater N availability was not associated with faster rates of decomposition of litter and forest floor, which were similar in gaps of all sizes (0–10 ha). Reciprocal transplant of forest floor and soil from the 10-ha gaps and the uncut forests indicated that changes in the nature of the forest floor or soil following harvest had a greater influence on nitrate concentrations than the changes in environmental conditions in the gaps.

scholarly journals Mollusca, Gastropoda, Ellobioidea, Carychium minimum O.F. Müller, 1774: filling gaps. New population record for the State of New York, Northeastern United States

Check List ◽  
2010 ◽  
Vol 6 (4) ◽  
pp. 517 ◽  
Author(s):  
Alexander M. Weigand ◽  
Adrienne Jochum
Keyword(s):  
United States ◽  
New York ◽  
North America ◽  
The State ◽  
Northeastern United States ◽  
Northeastern North America

The current note reports two new populations of the introduced snail Carychium minimum O.F. Müller, 1774 at Ithaca, New York, USA. It confirms the naturalization of this species in Northeastern North America, which was previously known on drift material only.

Characteristic discolorations of coniferous foliage related to spruce decline in Europe and North America

1989 ◽  
Vol 19 (1) ◽  
pp. 145-148 ◽  
Author(s):  
Heiko Liedeker ◽  
Richard M. Klein
Keyword(s):  
North America ◽  
Norway Spruce ◽  
High Elevation ◽  
Exposed Surface ◽  
Northeastern North America ◽  
Spruce Decline ◽  
Understory Trees

Characteristic spotting of foliage on Norway spruce in Europe, used as an indicator for Waldsterben, was also found and described on foliage of Piceaabies (L.) Karst., P. rubens Sarg., P. glauca (Moench) Voss, P. mariana (Mill.) B.S.P., Abiesbalsamea (L.) Mill., Pinusstrobus L., P. banksiana Lamb., P. resinosa Ait., P. sylvestris L., and Tsugacanadensis (L.) Carr. in northeastern North America. Yellow spotting is restricted to the upper, sun-exposed surface of the needles. These chlorotic spots generally start along ridges of the needles and merge into larger necrotic areas in later stages. It was observed that the number of spots per needle and the number of needles per internode exhibiting such spots are increasing with foliage age. The symptom was prominent on overstory and understory trees in high-elevation spruce–fir forests in Germany and northeastern North America. It was also found in all low-elevation stands sampled.

Estimation of sulphate concentration in high elevation fog in Northeastern North America

2003 ◽  
Vol 37 (8) ◽  
pp. 1087-1100 ◽  
Author(s):  
Natty Urquizo ◽  
Jeffrey R Brook ◽  
John L Walmsley ◽  
William R Burrows
Keyword(s):  
North America ◽  
High Elevation ◽  
Northeastern North America ◽  
Sulphate Concentration

Performance of planted Engelmann spruce and subalpine fir seedlings in British Columbia's southern mountains

2006 ◽  
Vol 82 (1) ◽  
pp. 84-94 ◽  
Author(s):  
C C Lajzerowicz ◽  
A. Vyse ◽  
M. Jull ◽  
T. Newsome
Keyword(s):  
British Columbia ◽  
Seedling Survival ◽  
High Elevation ◽  
Abies Lasiocarpa ◽  
Individual Tree ◽  
Relative Growth Rates ◽  
Subalpine Fir ◽  
Engelmann Spruce ◽  
South Central ◽  
Soil Temperatures

We compared survival and growth of planted seedlings of Engelmann spruce and subalpine fir across a range of harvest opening sizes (> 10 ha, 1 ha, 0.2 ha, 0.1 ha, 0.03 ha and individual tree selection) from three silvicultural systems trials in high-elevation spruce – subalpine fir forests in south-central British Columbia. Climatic patterns and growing season air and soil temperatures were similar across sites. Seedling survival decreased with opening size. Local site climates, influenced by aspect and moisture and air drainage, were more influential than elevation. Seedling growth was best in large openings and similar in opening sizes from 1 ha to 0.1 ha. Smaller openings created by group selection and individual tree selection methods were not favourable for successful planting at elevations close to timberline. The two species had similar absolute and relative growth rates but spruce responded more strongly to better growing environments. Key words: planted seedlings, Engelmann spruce, Picea engelmannii Parry ex Engelm., subalpine fir, Abies lasiocarpa (Hook.) Nutt., opening size, elevation effects, silvicultural systems, British Columbia, mountain forests

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