长江口滨海湿地植物群落潮沟水体有机碳动态及其影响因素

doi:10.3969/j.issn.1000-5641.2019.01.017

华东师范大学学报(自然科学版) ›› 2019, Vol. 2019 ›› Issue (1): 156-165.doi: 10.3969/j.issn.1000-5641.2019.01.017

• 河口海岸学 • 上一篇

长江口滨海湿地植物群落潮沟水体有机碳动态及其影响因素

费蓓莉^1,2, 解丽娜^1,2, 李诗华^1,2, 陈威^1,2, 葛振鸣^1,2

1. 华东师范大学河口海岸学国家重点实验室, 上海 200241;
2. 华东师范大学崇明生态研究院, 上海 200241

收稿日期:2017-10-30 出版日期:2019-01-25 发布日期:2019-01-24
通讯作者: 葛振鸣,男,研究员,博士生导师,研究方向为湿地生态学.E-mail:zmge@sklec.ecnu.edu.cn E-mail:zmge@sklec.ecnu.edu.cn
作者简介:费蓓莉,女,硕士研究生,研究方向为湿地生态学.
基金资助:
国家自然科学基金（41871088，41571083）；国家重点研发计划（2016YFE0133700，2017YFC0506001）；国家重点实验室自主课题（2015KYYW03）

Variations in organic carbon and its impact on tidal creeks within vegetation communities in the coastal wetlands of the Yangtze Estuary

FEI Bei-li^1,2, XIE Li-na^1,2, LI Shi-hua^1,2, CHEN Wei^1,2, GE Zhen-ming^1,2

1. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China;
2. Institute of Eco-Chongming, East China Normal University, Shanghai 200241, China

Received:2017-10-30 Online:2019-01-25 Published:2019-01-24

摘要/Abstract

摘要： 潮沟系统是滨海湿地与外界环境之间横向碳交换的重要通道.本研究以长江口滨海湿地典型植物群落（禾本科Poaceae和莎草科Cyperaceae）为研究对象，调查了不同潮汐（小潮期与大潮期）退潮过程中潮沟水体可溶性有机碳（DOC）和颗粒态有机碳（POC）的季节变化.结果表明，潮水向外输出的过程中，DOC和POC从高潮滩到口外浅水光滩均逐渐变化，大潮期时不同生境潮沟的有机碳丰度一般比小潮期高.在具有较高植物生物量和土壤有机碳储量的Poaceae群落中，各季节潮沟水体DOC含量均显著高于Cyperaceae生境潮沟；相反，各季节Cyperaceae群落潮沟POC含量则高于Poaceae群落潮沟.此外，Poaceae群落潮沟在各季节均表现为DOC净输出，而POC为净输入，各季节DOC和POC在Cyperaceae群落潮沟均呈现净输出趋势.

关键词: 潮沟系统, 有机碳, 季节变化, 植被类型, 潮汐

Abstract: Tidal creeks are identified as an important pathway for carbon exchange between coastal wetlands and the adjacent environment. This study investigated the seasonal variations in dissolved organic carbon (DOC) and particulate organic carbon (POC) in tidal creeks within typical vegetation communities (Poaceae and Cyperaceae) in the coastal wetlands of the Yangtze Estuary. The results showed that during ebb the concentrations of organic carbon components changed gradually along the altitude gradient from high marsh to low-lying shallow water areas outside the creeks. Generally, spring tides increased the organic carbon abundance in both creeks, relative to neap tide. In the Poaceae creek, with high plant biomass and soil carbon stocks, the DOC concentrations were significantly higher compared to the Cyperaceae creek during ebb across all seasons. In contrast, the POC contents were lower in the Poaceae creek compared to the Cyperaceae creek. The results of this study indicated that the Poaceae creek functioned as a net export (source) of DOC throughout the year but as a net sink of POC, and the Cyperaceae creek functioned as a net source of organic carbon over all seasons.

Key words: tidal creek system, organic carbon, seasonal variation, vegetation type, tide

中图分类号:

P933

费蓓莉, 解丽娜, 李诗华, 陈威, 葛振鸣. 长江口滨海湿地植物群落潮沟水体有机碳动态及其影响因素[J]. 华东师范大学学报(自然科学版), 2019, 2019(1): 156-165.

FEI Bei-li, XIE Li-na, LI Shi-hua, CHEN Wei, GE Zhen-ming. Variations in organic carbon and its impact on tidal creeks within vegetation communities in the coastal wetlands of the Yangtze Estuary[J]. Journal of East China Normal University(Natural Sc, 2019, 2019(1): 156-165.

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长江口滨海湿地植物群落潮沟水体有机碳动态及其影响因素

Variations in organic carbon and its impact on tidal creeks within vegetation communities in the coastal wetlands of the Yangtze Estuary

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