研究报告

  • 黑杰,胥佳忆,王亚非,刘旭阳,尹晓雷,王纯,王维奇.互花米草入侵对闽江河口湿地土壤碳、氮、磷及CH4和CO2排放的影响[J].环境科学学报,2022,42(11):416-426

  • 互花米草入侵对闽江河口湿地土壤碳、氮、磷及CH4和CO2排放的影响
  • Effects of Spartina alterniflora invasion on soil carbon, nitrogen, phosphorus, and CH4, CO2 emissions in Minjiang River estuarine wetland
  • 基金项目:国家自然科学基金(No.42141014,41901111);福建省自然科学基金(No.2020J01188)
  • 作者
  • 单位
  • 黑杰
  • 福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福州 350007;福建师范大学地理研究所,福州 350007
  • 胥佳忆
  • 福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福州 350007;福建师范大学地理研究所,福州 350007
  • 王亚非
  • 福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福州 350007;福建师范大学地理研究所,福州 350007
  • 刘旭阳
  • 福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福州 350007;福建师范大学地理研究所,福州 350007
  • 尹晓雷
  • 福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福州 350007;福建师范大学地理研究所,福州 350007
  • 王纯
  • 福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福州 350007;福建师范大学地理研究所,福州 350007
  • 王维奇
  • 福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福州 350007;福建师范大学地理研究所,福州 350007
  • 摘要:植物入侵是河口湿地土壤碳(C)、氮(N)、磷(P)循环的主要驱动因素.为了探讨福建闽江河口互花米草入侵短叶茳芏湿地对碳输入和 碳排放的影响,对土壤C、N、P含量和储量及CH4和CO2排放进行了测定与分析.结果表明:①互花米草入侵短叶茳芏湿地显著增加了0~60 cm土壤C、N含量和0~15 cm土壤P含量(p<0.05).②互花米草入侵短叶茳芏湿地后,0~60 cm土壤C、N、P储量分别增加了16%、46%、26%(p<0.05).③互花米草入侵短叶茳芏湿地后,0~15 cm和15~30 cm土壤C/N显著降低了33%和24%,15~30 cm土壤C/P降低了31%(p<0.05).④互花米草入侵短叶茳芏湿地显著增加了CH4和CO2平均和累积排放(p<0.05).⑤土壤C、N、P与土壤CO2和CH4排放呈显著正相关(p<0.05,p<0.01),微生物生物量碳(MBC)与土壤CH4排放呈显著正相关(p<0.01),土壤C/N与土壤CH4排放呈显著负相关(p<0.05).综合来看,互花米草入侵闽江 河口短叶茳芏湿地增强了土壤C、N、P的固持和CH4、CO2的排放,并受到生态化学计量比的调节.本研究拓展了对植物入侵情形下河口湿地 生物地球化学循环的认知.
  • Abstract:Plant invasion is taken as the important driving factor of soil carbon (C), nitrogen (N) and phosphorus (P) cycle in estuarine wetland. In order to explore the impact of Spartina alterniflora invasion on the Cyperus malaccensis wetland on carbon input and emission in the Minjiang River estuarine wetland of Fujian Province, the contents and storages of soil C, N and P, methane (CH4) and carbon dioxide (CO2) emissions were measured and analyzed. The results showed that: ①Spartina alterniflora invasion Cyperus malaccensis wetland increased the contents of soil C, N at 0~60 cm and soil P at 0~15 cm(p<0.05); ②The C, N and P storages of soil at 0~60 cm increased by 16%, 46% and 26% after Spartina alterniflora invasion Cyperus malaccensis wetland(p<0.05); ③Soil C/N at 0~15 cm and 15~30 cm decreased by 33% and 24%, and soil C/P at 15~30 cm decreased by 31% after Spartina alterniflora invaded Cyperus malaccensis wetland(p<0.05). ④Spartina alterniflora invasion Cyperus malaccensis wetland increased the average and cumulative emissions of CH4 and CO2p<0.05). ⑤Soil C, N and P were positively correlated with CO2 and CH4 emissions(p<0.05, p<0.01), microbial biomass carbon(MBC) was positively correlated with CH4 emissions(p<0.01), and C/N was negatively correlated with CH4 emissions(p<0.05). As a result, Spartina alterniflora invasion enhanced soil C, N, P sequestration and CH4 and CO2 emissions, which was regulated by ecological stoichiometry. The findings of this study can expand the understanding of biogeochemical cycles in estuarine wetlands under plant invasion scenarios.

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