文献类型：期刊文献

英文题名：Methane and carbon dioxide emissions from cultivated and native mangrove species in Dongzhai Harbor, Hainan

作者：Sheng, Nong[1] Wu, Feng[2,3] Liao, Baowen[2] Xin, Kun[2]

第一作者：Sheng, Nong

通信作者：Xin, K[1]

机构：[1]Hainan Normal Univ, Haikou 571158, Hainan, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Key Lab State Forestry Adm Trop Forestry Res, Guangzhou 510520, Peoples R China;[3]Zhaoqing Xinghu Natl Wetland Pk Management Ctr, Zhaoqing 526060, Peoples R China

年份：2021

卷号：168

外文期刊名：ECOLOGICAL ENGINEERING

收录：;EI(收录号：20212410514051);Scopus(收录号：2-s2.0-85107899567);WOS:【SCI-EXPANDED(收录号:WOS:000659060600010)】；

基金：This study was supported by National Natural Science Foundation of China (41876094, 31660126) . The authors give special thanks to Mr. Xu Yaowen for his valuable comments on the manuscript.

语种：英文

外文关键词：Greenhouse gas; Mangrove plants; Pneumatophores; Litter; Soil moisture

摘要：The strength of methane (CH4) and carbon dioxide (CO2) fluxes from different mangrove species are not well understood, and the roles that pneumatophores and litter play are especially unclear. For a complete seasonal cycle, we measured CH4 and CO2 fluxes from a cultivated mangrove species (Sonneratia apetala) and three typical native mangrove species: Bruguiera sexangula, Ceriops tagal and Kandelia obovata. Our results demonstrated that The CO2 emission rates of the four mangrove communities and the mudflat showed seasonal changes, and the emission rate was higher in summer than in winter. The CO2 fluxes were significantly higher in the soils of cultivated compared to native mangroves (P < 0.05) but there was no similar trend for CH4 fluxes. Pneumatophores in different mangrove species played different roles in CH4 and CO2 fluxes from soils. Pneumatophores in the B. sexangula and K. obovata communities significantly decreased CH4 emission (P < 0.05), but those in the C. tagal and S. apetala communities did not significantly affect it. The S. apetala with bamboo-like pneumatophores had significantly greater CO2 emission rate than the other three mangrove communities (P < 0.05). Pneumatophores in the S. apetala community significantly decreased CO2 emission (P < 0.05), but those in the other three communities had no significant effect. Litter had a significant effect on CH4 emission from mangrove soils, but not on CO2. Soil moisture content affected the CH4 emission rate; and temperature and other factors jointly affected the CO2 emission rate.