北京师范大学学报（自然科学版）2018，Vol.54Issue(1)：90-97,8.DOI:10.16360/j.cnki.jbnuns.2018.01.012
互花米草入侵对黄河口盐沼湿地土壤溶解性有机碳空间分布的影响
Impact of Spartina alterniflora invasion on spatial distribution of dissolved organic carbon in salt marsh soils of the Yellow River Estuary,China
摘要
Abstract
Spartina alterniflora,the most widely distributed alien species in coastal wetlands in China, can have profound effects on elemental cycles in coastal salt marshes.A sampling belt was selected in a typical distribution zone of Spartina alterniflora in the Yellow River Estuary,which was perpendicular to a tidal creek,including continuous ribbon zone,patch zone of Spartina alterniflora,bare land and a mixed zone of Spartina alterniflora and Suaeda salas.Soil samples were collected from soil profiles in triplicates at different intervals in each of the selected four sampling zones.Soil DOC and physi-chemical properties were then measured to investigate the impact of Spartinaalterniflora invasion on spatial distribution of DOC.Our results showed that DOC contents in upper (0-20 cm)and deeper soils (>20-100 cm)ranged from 5.68 to 112.17 mg· kg-1 and from 4.27 to 94.28 mg·kg-1 ,respectively.Spartina alterniflora invasion significantly increased DOC contents in upper soils (P<0.05),and a decreasing trend of DOC level was observed along the sampling belt.With the exception of patch zone,DOC contents all decreased gradually in other zones with depth along soil profiles.Spearman correlation analysis indicated a strong positive correlation between DOC and soil organic carbon (P<0.05)and clay content (P<0.01),while DOC was significantly negatively correlated with pH (P<0.01 ).Multivariate analysis showed different relationships between DOC and soil physical-chemical properties in upper and deeper soils.Therefore,spatial distribution of soil DOC can be altered after Spartina alterniflora invasion This work provides some basic knowledge about carbon cycles in coastal salt marshes.关键词
滨海盐沼/溶解性有机碳/互花米草/空间分布/黄河口Key words
coastal salt marsh/dissolved organic carbon/Spartina alterniflora/spatial distribution/the Yellow River Estuary分类
农业科技引用本文复制引用
张光亮,白军红,贾佳,庄涛,王昕,王伟,赵庆庆,盖凌云..互花米草入侵对黄河口盐沼湿地土壤溶解性有机碳空间分布的影响[J].北京师范大学学报（自然科学版）,2018,54(1):90-97,8.基金项目
国家重点研发计划资助项目(2017YFC0505906) （2017YFC0505906）
