Effects of simulated acid rain on the growth, nutrition, foliar pigments and photosynthetic rates of sugar maple and white spruce seedlings

1995 ◽  
Vol 83 (3-4) ◽  
pp. 219-236 ◽  
Author(s):  
Murray J. Dixon ◽  
Allen L. Kuja
Keyword(s):  
Acid Rain ◽  
Sugar Maple ◽  
White Spruce ◽  
Simulated Acid Rain ◽  
Photosynthetic Rates

Short-term acid damage to photosynthesis in corn and sugar maple leaves assessed by photoacoustic spectroscopy

1990 ◽  
Vol 68 (10) ◽  
pp. 2292-2300 ◽  
Author(s):  
C. N. N'soukpoé-Kossi ◽  
R. Bélanger ◽  
S. Keilani ◽  
H. Proteau ◽  
P. Boivin ◽  
...  
Keyword(s):  
Growth Rate ◽  
Acid Rain ◽  
Oxygen Evolution ◽  
Photoacoustic Spectroscopy ◽  
Sugar Maple ◽  
Photosynthetic Activity ◽  
Simulated Acid Rain ◽  
Acid Mixture ◽  
Photosynthetic Oxygen Evolution ◽  
Ph Values

Photoacoustic spectroscopy was used to monitor acid damage to photosynthesis by measuring photosynthetic O2 evolution in leaves from com and sugar maple plantlets. For 2 months the seedlings were treated with simulated acid rain either by spraying the leaves or by watering the soil at different pH levels. The results indicated a decline of photosynthetic oxygen evolution as the pH of the foliar application of simulated acid rain decreased. The reduced photosynthetic activity was sometimes followed by depigmentation (below pH 3.5). For plantlets treated by watering the soil with an acid mixture, the results showed an increase in the growth rate at higher acidity levels without effect on the photosynthetic activity. All corn seedlings from seeds that germinated in media of different pH levels showed the same photosynthetic activity regardless of the pH, as measured by photoacoustic spectroscopy, but the growth rate was higher at lower pH values than at higher pH values. These results clearly indicate the importance of acid damage to photosynthesis at the foliar level, and the ability of photoacoustic spectroscopy to assess forest decline in its early stages. Key words: photoacoustic spectroscopy, photosynthesis, corn, maple, acid rain, oxygen evolution.

Impact of simulated acid rain on microbial respiration, biomass, and metabolic quotient in a mature sugar maple (Acersaccharum) forest floor

1996 ◽  
Vol 26 (8) ◽  
pp. 1446-1453 ◽  
Author(s):  
Chandini M. Thirukkumaran ◽  
Ian K. Morrison
Keyword(s):  
Adverse Effects ◽  
Acid Rain ◽  
Forest Floor ◽  
Sugar Maple ◽  
Microbial Respiration ◽  
Microbial Biomass Carbon ◽  
Combined Treatment ◽  
Simulated Acid Rain ◽  
Experimental Conditions ◽  
Substrate Induced Respiration

Effects of simulated acid rain on forest floor microbiological processes were investigated in an old-growth sugar maple (Acersaccharum Marsh.) woods at Turkey Lakes Watershed, northern Ontario, Canada. Sulphate and NO3− in ambient precipitation received on four replicate plots were augmented with additions of dilute (0.02 N) H2SO4 and HNO3, applied alone and in combination periodically during the growing seasons of 1993 and 1994. The equivalent load of SO42− applied in the present experiment was ca. 6 times that in ambient precipitation in the H2SO4-only treatment and half that in the combined treatment over the study period. In situ soil respiration measured during the summer and fall of 1994 showed no adverse effects of acid treatment. In the laboratory, soil microbial respiration, biomass (as determined by substrate-induced respiration), and microbial biomass carbon: organic carbon (Cmic/Corg ratios were significantly depressed in the L or FH layers of the forest floor when H2SO4 was applied alone or in combination with HNO3. No effects of HNO3 were detected when applied alone. Microbial respiration, substrate-induced respiration, and Cmic/Corg ratios were significantly correlated with forest floor pH. Microbial metabolic quotients (respiration:biomass ratios) were not adversely affected by any of the treatments. The observed deleterious effects of H2SO4 application under experimental conditions suggest the possibility of adverse effects in the field over the long-term.

Effect of Simulated Acid Rain on Gas Exchanges of Three Compositae Invasive Plants

2013 ◽  
Vol 48 (2) ◽  
pp. 160-167
Author(s):  
Song Liying ◽  
Ke Zhanhong ◽  
Sun Lanlan ◽  
Peng Changlian
Keyword(s):  
Acid Rain ◽  
Invasive Plants ◽  
Simulated Acid Rain ◽  
Gas Exchanges
Sign in / Sign up

Export Citation Format

Share Document