文献类型：期刊文献

英文题名：Phragmites australis meets Suaeda salsa on the "red beach": Effects of an ecosystem engineer on salt-marsh litter decomposition

作者：Cui, Lijuan[1] Pan, Xu[1] Li, Wei[1] Zhang, Xiaodong[1] Liu, Guofang[2] Song, Yao-Bin[3] Yu, Fei-Hai[4] Prinzing, Andreas[5] Cornelissen, Johannes H. C.[6]

通信作者：Pan, X[1]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing Key Lab Wetland Serv & Restorat, Beijing 100091, Peoples R China;[2]Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China;[3]Hangzhou Normal Univ, Coll Life & Environm Sci, Key Lab Hangzhou City Ecosyst Protect & Restorat, Hangzhou 310036, Zhejiang, Peoples R China;[4]Taizhou Univ, Inst Wetland Ecol & Clone Ecol, Taizhou 318000, Peoples R China;[5]Univ Rennes 1, Res Unit Ecobio, CNRS, Campus Beaulieu,Batiment 14 A, F-35042 Rennes, France;[6]Vrije Univ Amsterdam, Fac Earth & Life Sci, Dept Ecol Sci, Syst Ecol, NL-1081 HV Amsterdam, Netherlands

年份：2019

卷号：693

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20193107247132);Scopus(收录号：2-s2.0-85069709300);WOS:【SCI-EXPANDED(收录号:WOS:000489694700083)】；

基金：This work was funded by National Key Research and Development Program of China (2017YFC0506200), and China Postdoctoral Science Foundation (2015M571161). J.H.C.C. received support from the Royal Netherlands Academy of Arts and Sciences (KNAW, Chinese Exchange Programme grant 12CDP007) for research exchange travels to China. We thank the Liaohe Estuary National Nature Reserve for the research permit and thank Jing Li and Xiufang Xie for the manuscript preparation. Many thanks to Ye Liu, Baodi Sun, Kai Li and Xiaoquan Na for the field assistant. We also thank the anonymous referees for constructive comments on an earlier version of this manuscript. The authors have no conflicts of interest to declare.

语种：英文

外文关键词：Aboveground and belowground processes; Carbon and nutrient cycling; Ecosystem engineer; Litter decomposition; Plant encroachment; Salt marsh

摘要：Suaeda salsa is a pioneer species in coastal wetlands of East Asia and recently an ecosystem engineer species, Phragmites australis, has started to enter into S. salsa communities owing to either autogenic or external drivers. The consequences of this phenomenon on the ecosystem functions of coastal wetlands are still unclear, especially for decomposition processes. Here we compared the decomposition rate of S. salsa litter, and associated litter chemistry dynamics, between sites with and without P. australis encroachment. We conducted a litter transplantation experiment to tease apart the effects of litter quality and decomposing environment or decomposer community composition. Our results showed that P. australis encroachment led to higher carbon and phosphorus losses of S. salsa litter, but equal losses of total mass, lignin, hemicellulose and nitrogen. Phragmites australis encroachment might affect decomposition rate indirectly by making S. salsa produce litter with higher lignin concentrations or via increasing the fungal diversity for decomposition. Moreover, P. australis as an ecosystem engineer might also alter the allocation of total phosphorus between the plants and the soils in coastal wetlands. Our findings indicate that P. australis could impact aboveground and belowground carbon and nutrient dynamics in coastal wetlands, and highlight the important consequences that encroaching plant species, especially ecosystem engineers, can have on ecosystem functions and services of coastal wetlands, not only in East Asia but probably also elsewhere in the world. (C) 2019 Elsevier B.V. All rights reserved.