Acid rain decelerates the decomposition of Cunninghamia lanceolata needle and Cinnamomum camphora leaf litters in a karst region in China
Acid rain decelerates the decomposition of Cunninghamia lanceolata needle and Cinnamomum camphora leaf litters in a karst region in China
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酸雨减缓中国喀斯特地区杉木针叶和樟树凋落物的分解
DOI：
10.1111/1440-1703.1065
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发表时间：
2019
影响因子：
2
通讯作者：
Han Guomin
中科院分区：
文献类型：
--
作者：
Tang Li;Lin Yonghui;He Xingbing;Han Guomin
一般认为酸雨对凋落物分解有抑制作用，但这种抑制作用往往取决于当地土壤环境因子，如养分和理化性质。岩溶生态系统以富含CaCO 3为特征，CaCO 3具有与酸雨中H+反应的潜力。然而，这是未知的酸雨对凋落物分解的影响是否会减轻这种潜在的反应。为探讨酸雨对杉木和肉桂凋落物分解的影响，在亚热带喀斯特地区进行了为期1年的杉木和肉桂凋落物分解试验。与假设相反，凋落物分解显着减速酸雨的两种类型。对于C.结果表明，在培养末期，中度酸雨导致的质量损失最大（43%），而重度酸雨导致的质量损失最小（39%）;结果表明：环境处理组（66%）>中度处理组（56%）>重度处理组（42%）。微生物活动（包括CO2通量、真菌生物量和微生物降解酶）在酸雨处理中也表现出与质量损失相似的变化规律。这些响应表明，酸雨对凋落物分解的减速作用不依赖于石灰性土壤以及凋落物质量。总之，这些结果表明，酸雨对枯枝落叶分解的控制作用优于土壤和枯枝落叶质量，这些信息可能有助于预测喀斯特生态系统对环境因子的功能响应。
Acid rain is generally believed to inhibit litter decomposition, but this inhibition effect often depends on local soil environmental factors such as nutrient and physicochemical property. Karst ecosystem is typically characterized by rich CaCO3, which can potentially react with H+from acid rain. However, it is unknown whether the effect of acid rain on litter decomposition will be mitigated by this potential reaction. To investigate the effect of acid rain on decomposition, we undertook a field experiment on the decomposition of litters ofCunninghamia lanceolataneedle andCinnamomum camphoraleaf during 1 year in a karst region in subtropical China. Contrary to hypothesis, litter decomposition was significantly decelerated by acid rain for the two litter types. ForC. lanceolatalitter, at the end of incubation, we noted that moderate acid rain resulted in the highest loss in mass (43%), while severe one showed the lowest loss (39%); forC. camphoralitter, the mass loss was as follows: ambient treatment (66%) > moderate treatment (56%) > severe treatment (42%). Also microbial activities (including CO2flux, fungal biomass and microbial degrading enzymes) showed similar variation patterns among acid rain treatments to mass loss. These responses indicated that the deceleration effect of acid rain on litter decomposition did not depend on calcareous soil as well as litter quality. Together, these results suggest that acid rain had a predominant controlling of litter decomposition over soil and litter qualities, and this information may be useful for predicting functional responses of karst ecosystem to environmental factors.
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影响因子：
4.8
作者：
A. Špaldoňová;J. Frouz
通讯作者：
A. Špaldoňová;J. Frouz
影响因子：
--
作者：
唐黎 Tang Li;林永慧 Lin Yonghui;何兴兵 He Xingbing
通讯作者：
唐黎 Tang Li;林永慧 Lin Yonghui;何兴兵 He Xingbing
影响因子：
2
作者：
Dilly, O;Munch, JC
通讯作者：
Munch, JC
影响因子：
2.8
作者：
Wenjie Tian;Lijian Wang;Dong Li;Fasheng Li
通讯作者：
Wenjie Tian;Lijian Wang;Dong Li;Fasheng Li
影响因子：
9.7
作者：
BEWLEY, RJF;STOTZKY, G
通讯作者：
STOTZKY, G