文献类型：期刊文献

英文题名：Comparison of methane emissions among invasive and native mangrove species in Dongzhaigang, Hainan Island

作者：He, Yixin[1] Guan, Wei[2] Xue, Dan[1] Liu, Liangfeng[1] Peng, Changhui[3,4] Liao, Baowen[2] Hu, Ji[1] Zhu, Qiu'an[3] Yang, Yanzhen[3] Wang, Xu[2] Zhou, Guanyi[2] Wu, Zhongming[2] Chen, Huai[1,3]

第一作者：He, Yixin

通信作者：Chen, H[1]

机构：[1]Chinese Acad Sci, Chengdu Inst Biol, Key Lab Sichuan Prov, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu 610041, Sichuan, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[3]Northwest A&F Univ, Coll Forestry, State Key Lab Soil Eros & Dryland Farming, Yangling 712100, Shaanxi, Peoples R China;[4]Univ Quebec Montreal UQAM, Dept Biol Sci, Inst Environm Sci, 201 President Kennedy, Montreal, PQ H2X 3Y7, Canada

年份：2019

卷号：697

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20193507379342);Scopus(收录号：2-s2.0-85071401359);WOS:【SCI-EXPANDED(收录号:WOS:000499668600020)】；

基金：This study was supported by Key Research Program of Frontier Sciences, Chinese Academy of Sciences (QYZDB-SSW-DQC007), Strategic Priority Research Program of Chinese Academy of Sciences (XDA2005010404) and National Natural Science Foundation of China (31570480). The authors give special thanks to Ms. Wan Xiong for her editing and valuable comments on the manuscript.

语种：英文

外文关键词：Greenhouse gases; Biogeochemistry; Tropical ecosystems; Methane budget; Mangrove forests

摘要：The strength of methane (CH4) source of mangroves is not well understood, especially when including all CH4 pathways in consideration. This study measured CH4 fluxes by five pathways (sediments, pneumatophores, water surface, leaves, and stems) from four typical mangrove forests, including Kandelia candel without pneumatophores and three species with pneumatophores: Sonneratia apetala, Laguncularia racemosa and Bruguiera gymnorhiza-Bruguiera sexangula. The CH4 fluxes from sediments were 4.82 +/- 1.46 mg CH4 m(-2) h(-1) for K. candel and 1.36 +/- 0.17 mg CH4 m(-2) h(-1) for the other three with pneumatophores. Among the three communities with pneumatophores, S. apetala community had significantly greater emission rate than the other two(P < 0.05). Pneumatophores in S. apetala were found to significantly decrease CH4 emission from sediments (P < 0.01), while those in B. gymnorhiza-B. sexangula were significantly increase it (P < 0.05). CH4 fluxes from waters were 3.48 +/- 1.11 mg CH4 m(-2) h(-1), with the highest emission rate in the K. candel community for the duck farming. Leaves of mangroves except for those of K. candel were a weak CH4 daytime sink, but stems were a weak source. The total 72 ha of mangroves in the Changning river basin emitted about 8.10 Gg CH4 per year, with a weighted emission rate of about 1.29 mg CH4 m(-2) h(-1). Our results suggested that mangroves are only a small methane source to atmosphere with great contribution from sediments and waters, only slight contribution from leaves and stems. Pneumatophores of different mangrove species played different roles in CH4 fluxes from sediments. (C) 2019 Elsevier B.V. All rights reserved.