Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 94, Issue 1, Pages 108-111Publisher
SPRINGER
DOI: 10.1007/s00128-014-1404-5
Keywords
Acid rain; Enzyme activity; Earthworm; Latosol
Categories
Funding
- National Natural Science Foundation of China [40871118]
- Natural Science Foundation of Guangdong Province, China [8151064201000048, 9451064201003801, S2011010001570]
- China Postdoctoral Special Fund [201003355]
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Acid rain is still an issue of environmental concerns. This study investigated the impacts of simulated acid rain (SAR) upon earthworm activity from the Latosol (acidic red soil). Laboratory experiment was performed by leaching the soil columns grown with earthworms (Eisenia fetida) at the SAR pH levels ranged from 2.0 to 6.5 over a 34-day period. Results showed that earthworms tended to escape from the soil and eventually died for the SAR at pH = 2.0 as a result of acid toxicity. The catalase activity in the earthworms decreased with the SAR pH levels, whereas the superoxide dismutases activity in the earthworms showed a fluctuate pattern: decreasing from pH 6.5 to 5.0 and increasing from pH 5.0 to 4.0. Results implied that the growth of earthworms was retarded at the SAR pH a parts per thousand currency sign 3.0.
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