黄河三角洲恢复湿地沉积物和生源要素的沉积速率

	黄河三角洲恢复湿地沉积物和生源要素的沉积速率
其他题名	The deposition rate of sediments and biogenic elements in the restored wetland in the Yellow River Delta
	张扬 1,2; 宋佳伟 1,2; 徐刚1,3 ; 陈小兵1 ; 吕迎春3
发表期刊	环境化学
ISSN	0254-6108
	2021
卷号	40 期号:10 页码:3093-3099
关键词	黄河三角洲恢复湿地沉积速率生源要素 "突变点"技术
英文摘要	Sedimentation rate plays an important role in wetland deposition because it indicates the storage capacity of wetland sediment and biogenic element. In this study, two sediment columns with a depth of 50 cm were collected in the restored wetland in the Yellow River Delta, and 10 soil physical and chemical properties were measured. The change point of the soil properties and the age since wetland restoration were used to determine the sedimentation rate. The results showed that the variables such as TOC, TN, delta~(13)C, and delta~(15)N, which were related to the accumulation of soil organic matter, were more suitable for calculating the deposition depth of the new layer of sediment in the restored wetland. As a result, the average sedimentation rate of the new layer in R2002 was calculated as 0.75 cm·a~(-1), and the deposition rates of C, N, and P were 208.65 g·m~(-2)·a~(-1), 20.74 g·m~(-2)·a~(-1), and 4.11 g·m~(-2)·a~(-1), respectively. In conclusion, the change point technique can be accurately used to determine the sedimentation rate of the new layer in restored wetland. In the future, the restored wetland will play more and more important role in sequester excess nutrient (such as N or P) due to human activities and global climate change.
中文摘要	沉积速率是湿地沉积研究的重要内容,是指示湿地沉积物和生源要素存储效率的定量指标.本研究在黄河三角洲恢复湿地采集了沉积深度为50 cm剖面高分辨率沉积物样品,测定10余种土壤理化特征,采用湿地形成前后土壤理化性质变化"突变点",结合湿地恢复确定的时间标,计算了湿地沉积物和生源要素(C、 N、 P)元素的沉积速率.研究结果表明,跟湿地有机质积累有关的总有机碳(TOC)、总氮(TN)、碳稳定同位素比率(δ^(13)C)、氮稳定同位素比率(δ^(15)N)含量适合于拟合湿地"新生层"的沉积深度.黄河三角洲湿地(R2002)恢复15年形成的湿地"新生层"的平均沉积速率为0.75 cm·a^(-1),各元素的沉积速率分别为C:208.65 g·m^(-2)·a^(-1)、N:20.74 g·m^(-2)·a^(-1)、P:4.11 g·m^(-2)·a^(-1)."突变点"技术可准确测定恢复湿地新生层深度及沉积速率,在未来人类活动和全球变化影响加速的背景下,对恢复湿地生源要素(如碳磷等)"扣留效应"的重要意义应当引起足够重视.
文章类型	期刊论文
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:7081923
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/34160
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
作者单位	1.中国科学院烟台海岸带研究所,烟台264003; 2.中国科学院大学,北京100049; 3.曲阜师范大学地理与旅游学院,日照276826
推荐引用方式 GB/T 7714	张扬,宋佳伟,徐刚,等. 黄河三角洲恢复湿地沉积物和生源要素的沉积速率[J]. 环境化学,2021,40(10):3093-3099.
APA	张扬,宋佳伟,徐刚,陈小兵,&吕迎春.(2021).黄河三角洲恢复湿地沉积物和生源要素的沉积速率.环境化学,40(10),3093-3099.
MLA	张扬,et al."黄河三角洲恢复湿地沉积物和生源要素的沉积速率".环境化学 40.10(2021):3093-3099.