Nitrogen deposition may increase litter accumulative CO2 release in a subtropical estuarine marsh
文献类型： 外文期刊
作者： Hu, Weifang 1 ; Zeng, Congsheng 2 ; Tong, Chuan 2 ; Li, Guoliang 1 ; Lan, Xue 4 ; Zhou, Jiacong 2 ; Zhang, Meiying 2 ; Chen, Yuehmin 2 ; Zhang, Linhai 2 ;
作者机构： 1.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou, Peoples R China
2.Fujian Normal Univ, Coll Geog Sci, Fuzhou, Peoples R China
3.Fujian Normal Univ, State Key Lab Subtrop Mt Ecol, Funded Minist Sci & Technol & Fujian Prov, Fuzhou, Peoples R China
4.South China Agr Univ, Coll Marine Sci, Guangzhou, Peoples R China
5.Fujian Normal Univ, Fujian Prov Key Lab Plant Ecophysiol, Fuzhou, Peoples R China
关键词： litter-derived CO2; litter decomposition; nitrogen addition; estuarine marsh; accumulative CO2 release
期刊名称：FRONTIERS IN MARINE SCIENCE （ 影响因子：5.247； 五年影响因子：5.72 ）
ISSN：
年卷期： 2022 年 9 卷
页码：
收录情况： SCI
摘要： Microbial evolution-mediated CO2 from litter has aroused widespread concern, and knowing the factors controlling litter-derived CO2 is important when considering the effects of accumulative CO2 release from litter on the global greenhouse. We conducted a short-term N addition (6, 16, and 24 g N m(-2) yr(-1)) experiment in Cyperus malaccensis var. brevifolius (shichito matgrass) litter decomosition. Phospholipid fatty acid (PLFA) method and enzyme method were used to analysis litter microbial community composition and enzymatic activity. During a 220-day decomposition period, there was little effect of the N amendments on litter CO2 evolution rates (9.97-307.54 mu g C g(-1) h(-1)) with a notable exception regarding the increase of the high-N treatment at day 20. The accumulative CO2 release significantly increased after N addition in the medium and late phases. The facilitation effect on accumulative CO2 release by N amendments was more and more obvious over the decomposition time, especially for the low- and intermediate-N treatments. At the end of our experiment, compared with the control treatment, accumulative CO2 release increased 69.75%, 76.62%, and 39.93% for low-, intermediate-, and high-N treatments, respectively. These observations highlight that N deposition could cause high losses of litter C as CO2.
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