文献类型：期刊文献

英文题名：Climate and soil nutrients control the geographical variations in anaerobic CH4 and CO2 emissions from coastal salt marshes

作者：Xiong, Jing[1,2,4] Shao, Xuexin[1,3,4] He, Genhe[2] Chen, Jiahao[2] Xu, Haidong[5] Wu, Ming[1,3,4]

第一作者：Xiong, Jing

通信作者：Shao, XX[1];Wu, M[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Wetland Ecosyst Res Stn Hangzhou Bay, Hangzhou 311400, Peoples R China;[2]Jinggangshan Univ, Sch Life Sci, Key Lab Jiangxi Prov Funct Biol & Pollut Control R, Jian 343009, Peoples R China;[3]Zhejiang Prov Key Lab Wetland Intelligent Monitori, Hangzhou 311400, Peoples R China;[4]State Key Lab Wetland Conservat & Restorat, Beijing 100093, Peoples R China;[5]Shandong Univ Aeronaut, Yellow River Delta Ecol Environm Res Ctr, Binzhou 256600, Peoples R China

年份：2026

卷号：222

外文期刊名：MARINE POLLUTION BULLETIN

收录：;EI(收录号：20254519468388);Scopus(收录号：2-s2.0-105020944687);WOS:【SCI-EXPANDED(收录号:WOS:001616135500001)】；

基金：This study was financially supported by the Zhejiang Province Commonwealth Projects (LTGS24C160001); the Zhejiang Provincial Science and Technology Program (2024C02002, 2023C03120); the Foundation of Research Institute of Subtropical Forestry, Chinese Academy of Forestry (RISFZ-2023-01); the National Natural Science Foundation of China (31870597); the Key Laboratory of Jiangxi Province for Functional Biology and Pollution Control in Red Soil Regions (2023SSY02051).

语种：英文

外文关键词：Coastal land-use; Climate warming; Climate zones; Carbon decomposition; Temperature sensitivity; Anaerobic respiration

摘要：As powerful greenhouse gases, CH4 and CO2 are actively produced in coastal wetlands that are vulnerable to climate warming and land use change, yet current CH4 and CO2 estimations, as well as future shifts in CH4 and CO2 predictions, have high uncertainties. Here, we incubated 480 soils from natural wetlands, reclaimed wetlands, invasive wetlands, and bare mudflats along the Chinese coastal line at three temperature levels (15 degrees C, 25 degrees C, and 30 degrees C) to determine the influence of climate and land use on CH4 and CO2 and their temperature sensitivities (Q(10)). We found that average CH4 and CO2 emissions were significantly higher at 25 degrees C than those at 15 degrees C and 30 degrees C, and Q(10) values of CH4 and CO2 were significantly higher at 25-30 degrees C than those at 15-25 degrees C and 15-30 degrees C, and all of these patterns remained consistent with increasing soil depth. Across all coastal wetlands studied, the average of CH4 and CO2 emissions (1.87 +/- 0.67 mu gg(-1)d(-1) and 1.23 +/- 0.47 mu gg(-1)d(-1), respectively) and Q(10) values of CH4 (Q(10)-CH4) and CO2 (Q(10)-CO2) (1.23 +/- 0.47 and 1.09 +/- 0.53, respectively) were obviously lower in coastal wetlands than those in freshwater wetlands, indicating a relatively lower risk of coastal ecosystems to global warming. We also observed that CH4 emission and Q(10)-CH4 increased, but CO2 emission and Q(10)-CO2 decreased as latitude increased, and these patterns were strongly correlated with mean annual temperature (MAT) and precipitation (MAP). The average CH4 and CO2 first increased and then decreased significantly along the hydrological gradients from bare mudflats to invasive wetlands, natural wetlands, and reclaimed wetlands; In contrast, Q(10)-CH4 and Q(10)-CO2 increased slightly, and all of these patterns were strongly affected by the soil C, N, and P conditions. However, these changes and key driving factors varied greatly across climate zones. These findings emphasized the importance of a comprehensive multi-site approach for understanding the effect of land-use and of current and future climate changes on anaerobic CH4 and CO2 emissions in coastal wetlands.