scholarly journals Soil-calcium depletion linked to acid rain and forest growth in the eastern United States

1999 ◽  
Keyword(s):  
United States ◽  
Acid Rain ◽  
Forest Growth ◽  
Eastern United States ◽  
Calcium Depletion ◽  
Soil Calcium

Acid Rain Reduced in Eastern United States

2000 ◽  
Vol 34 (6) ◽  
pp. 940-949 ◽  
Author(s):  
James A. Lynch ◽  
Van C. Bowersox ◽  
Jeffrey W. Grimm
Keyword(s):  
United States ◽  
Acid Rain ◽  
Eastern United States

Influence of simulated acid rain on the flowering dogwood (Cornusflorida) leaf surface

1994 ◽  
Vol 24 (5) ◽  
pp. 1058-1062 ◽  
Author(s):  
Daniel A. Brown ◽  
Mark T. Windham ◽  
Robert L. Anderson ◽  
Robert N. Trigiano
Keyword(s):  
United States ◽  
Acid Rain ◽  
Leaf Surface ◽  
Simulated Acid Rain ◽  
Eastern United States ◽  
Flowering Dogwood ◽  
Simulated Rain ◽  
Decreasing Ph ◽  
One Year ◽  
Scanning Electron

Acidic rainfall has the potential to influence anthracnose incidence and severity in flowering dogwood (Cornusflorida L.) of the eastern United States. One-year-old, nursery-grown flowering dogwood seedlings were exposed to 1 cm of simulated rain 10 times over a 42-day period in 1990. Simulated rains were composed of a mixture of salts typical of ambient rainfall in the eastern United States and pH was adjusted to 5.5, 4.5, 3.5, and 2.5 with sulfuric and nitric acids. Samples were cut from the leaf tip, margin, and midvein of rain-treated trees and prepared for scanning electron microscopy. Cuticular cracking, desiccation, and erosion of trichome surfaces was observed in response to acid rain treatment. Increased degradation of dogwood trichomes was observed with decreasing pH for all samples. Cuticular erosion due to acid rain has the potential to predispose dogwoods in the eastern United States to anthracnose caused by Disculadestructiva sp.nov. (Red.) and an unnamed Discula sp.

scholarly journals Forest growth trends in the eastern United States

2020 ◽  
Vol 96 (02) ◽  
pp. 121-129
Author(s):  
Craig Loehle
Keyword(s):  
United States ◽  
Fire Regimes ◽  
Forest Growth ◽  
Permanent Plots ◽  
Past Century ◽  
Growth Enhancement ◽  
Eastern United States ◽  
Data Types ◽  
Growth Trends ◽  
The Past

Changes over the past century in factors such as temperature, precipitation, fire regimes, ozone, atmospheric CO2, and nitrogen deposition naturally lead to questions about forest growth over this same time period. Determining changes in forest growth over long intervals is complicated by constantly changing growth conditions due to tree maturation, stand self-thinning, disturbance, fires, and other factors. Because a comprehensive review is lacking, results were evaluated from publications examining forest growth trends in the eastern United States over the past 100 years. Available studies used multiple sources of data, including permanent plots, growth models, and tree-ring analysis to evaluate forest growth trends. Reviewed publications (n = 19) reported medium to strong growth enhancement based on a variety of data types over periods exceeding 100 years in some cases. Model-based analyses, which mostly did not include CO2 and nitrogen fertilization effects, had lower estimates of growth enhancement. Results were consistent for different study lengths and data types. No study reported forest-scale growth declines. Factors identified as the cause of enhanced growth varied by study, but included rising CO2 concentrations, N deposition, increased precipitation, and warming temperatures.

scholarly journals Acid Rain: Ionic Correlations in the Eastern United States, 1980-1981

Science ◽  
1984 ◽  
Vol 225 (4660) ◽  
pp. 407-409 ◽  
Author(s):  
E. GORHAM ◽  
F. B. MARTIN ◽  
J. T. LITZAU
Keyword(s):  
United States ◽  
Acid Rain ◽  
Eastern United States
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