首页|闽江河口春季互花米草入侵过程对短叶茳芏沼泽土壤碳氮分布特征的影响

闽江河口春季互花米草入侵过程对短叶茳芏沼泽土壤碳氮分布特征的影响

扫码查看
原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
  • 维普
2014年4月,选择闽江口鳝鱼滩湿地中未被入侵的短叶茳芏群落(A)、互花米草入侵斑块边缘(B)以及互花米草入侵斑块中央(C)为研究对象,基于时空互代研究方法,探讨了互花米草入侵序列下湿地土壤碳氮空间分布特征的差异.结果表明,互花米草入侵显著降低了土壤的NO3--N含量(P＞0.05),但整体增加了NH4+-N含量,这与其入侵后导致湿地土壤颗粒组成发生显著变化(砂砾含量增加33.81％),进而促进了土壤的矿化作用和硝化作用,并有助于硝态氮的垂直淋失有关.互花米草入侵整体增加了土壤的碳氮含量和C/N比,与入侵进程和入侵前相比,互花米草入侵后湿地土壤的碳储量分别增加了8.73％和24.37％,氮储量则分别增加了10.22％和17.87％,这主要与其对闽江口湿地植物群落格局、养分生物循环以及强促淤作用引起的土壤颗粒组成等显著改变有关.研究发现,闽江口互花米草入侵对短叶茳芏湿地土壤碳氮含量的影响相对于江苏盐城、长江口以及杭州湾湿地的影响可能更为显著,其互花米草入侵较大改变了土壤中陆源和海源有机质的来源比例,使得入侵后湿地土壤养分的自源性增强.
Effect of Spartina alterniflora invasion sequence on soil carbon and nitrogen distribution in a Cyperus malaccensis marsh of the Min River estuary in spring
In April 2014,we investigated the differences of spatial distribution of Spartina alterniflora invasion sequence on soil carbon and nitrogen in a Cyperus malaccensis marsh.We analyzed a non-invaded C.malaccensis marsh (A),S.alterniflora-invaded patch edge (B),and S.alterniflora-invaded marsh (C) of the Min River estuary by using new-generation space-time methods.The results showed that invasion of S.alterniflora significantly reduced the NO3--N content (P＞0.05) but increased the NH4+-N content,which is mainly due to the invasion significantly changed the marsh soil particle composition (the sand content significantly increased by 33.81％) and promoted soil mineralization and nitrification,and vertical nitrate leaching.S.alterniflora invasion increased the carbon and nitrogen content and C/N ratio of soil.Comparing the C.malaccensis community and the invasive plate edge,soil carbon stock increased by 8.73％ and 24.37％,respectively,while nitrogen stock increased by 10.22％ and 17.87％,respectively,because the invasion of S.alterniflora resulted in a significant change of soil particle composition from marsh plant community structure,nutrient cycling and high siltation.With respect to the invasion of S.alterniflora in Yancheng (Jiangsu Province),Yangtze estuary,and Hangzhou Bay wetlands,the carbon and nitrogen contents of soil showed more significant changes by the invasion of S.alterniflora on C.malaccensis in the Min River estuary,and the S.alterniflora invasion could change the sources of terrestrial and marine organic matter in the soil,autogenously enhancing soil nutrients in marshes,too.

Spartina alterniflora invasionCyperus malaccensiscarbon contentnitrogen contentMin River estuary

李家兵、张秋婷、张丽烟、仝川

展开 >

福建师范大学地理科学学院,福州 350007

福建师范大学环境科学与工程学院,福州 350007

福建闽江河口湿地国家级自然保护区管理处,福州 350200

福建师范大学亚热带湿地研究中心,福州 350007

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

展开 >

互花米草入侵 短叶茳芏 碳含量 氮含量 闽江口

国家科技基础性工作专项福建省基本科研专项重点项目国家自然科学基金福建省教育厅A类福建省科技厅重点项目

2013FY1118002014R1034-141171119JA140882015R0099

2016

10.5846/stxb201510092040

生态学报
中国生态学学会,中国科学院生态环境研究中心

生态学报

CSTPCDCSCDCHSSCD北大核心
影响因子：2.191
ISSN：1000-0933
年,卷(期)：2016.36(12)
  • 34
  • 33