Simulated sulfuric and nitric acid rain inhibits leaf breakdown in streams: A microcosm study with artificial reconstituted fresh water

被引：29
作者：
Du, Jingjing [1 ,2 ,3 ]
Qv, Mingxiang [1 ]
Zhang, Yuyan [1 ]
Cui, Minghui [1 ]
Zhang, Hongzhong [1 ,2 ,3 ]
机构：
[1] Zhengzhou Univ Light Ind, Sch Mat & Chem Engn, Zhengzhou 450001, Peoples R China
[2] China Natl Light Ind, Key Lab Pollut Treatment & Resource, Zhengzhou, Peoples R China
[3] Collaborat Innovat Ctr Environm Pollut Control &, Zhengzhou, Peoples R China
来源：
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2020年 / 196卷
基金：
中国国家自然科学基金;
关键词：
Acid rain; S:N ratio; Leaf breakdown; Fungal community; Enzyme activity; AQUATIC HYPHOMYCETE DIVERSITY; LONG-TERM TREND; LITTER DECOMPOSITION; SUBTROPICAL PLANTATION; FUNGAL BIOMASS; ACIDIFICATION; NANOPARTICLES; GROWTH; DEPOSITION; IMPACTS;
D O I：
10.1016/j.ecoenv.2020.110535
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Acid rain containing SO42- and NO3- in China has been a public concern for decades. However, a decrease of SO2 has been recorded since the government enacted a series of policies to control its emission. To comprehensively evaluate the consequence of realistic and future acid deposition scenarios, this study explored the effects of mixed acid rain with different molar ratios of SO42- and NO3- (0:1, 1:0, 2:1, 1:1, and 1:2) on stream leaf breakdown through a microcosm experiment. A significant inhibition of leaf breakdown rate was observed when the ratio was 1:2 with reduced microcosm pH, fungal biomass, enzyme activities as well as the frequencies of hub general in the fungal community. In conclusion, the ratio of SO42- and NO3- in acid rain was an important factor that could have a profound impact on leaf breakdown, even on ecosystem structure and functioning of streams.
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页数：8
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