This is the accepted version of the article: Li, Xiaofei; Sardans i Galobart, Jordi; Hou, Lijun; [et al.]. «Climatic temperature controls the geographical patterns of coastal marshes greenhouse gases emissions over China». Journal of Hydrology, Vol. 590 (Nov. 2020), art. 125378. DOI 10.1016/j.jhydrol.2020.125378 This version is avaible at https://ddd.uab.cat/record/232211 under the terms of the license Table 1. Site locations and climatic temperatures. Site Longitude Latitude Distance July December MAT Climatic type (E) (N) (km) (°C) (°C) (°C) DD 123°11' 39°47' 39 31.5 -2.2 9.0 Temperate TS 118°42' 39°30' 82 32.3 5.2 12.5 Temperate WF 119°10' 37°32' 50 33.6 2.1 12.3 Temperate QD 121°24' 36°37' 35 26.8 3.5 12.7 Temperate DF 120°10' 34°09' 32 27.3 8.4 14.1 Temperate SH 121°52' 31°08' 15 32.4 10.6 17.6 Subtropical WZ 121°19' 27°58' 29 36.6 14.7 18.0 Subtropical FZ 119°28' 25°35' 32 36.8 19.3 19.3 Subtropical ST 115°42' 23°07' 20 33.2 23.8 21.3 Subtropical ZH 113°05' 21°48' 34 32.3 22.6 22.5 Subtropical BH 108°35' 21°52' 11 31.6 26.1 22.9 Subtropical DD, TS, WF, QD, DF, SH, WZ, FZ, ST, ZH and BH are abbreviations for the cities of Dandong, Tangshan, Weifang, Qingdao, Dafeng, Shanghai, Wenzhou, Fuzhou, Shantou, Zhuhai and Beihai, respectively. Distance, the spatial distance of sampling site to city. MAT, mean annual temperature. 1/6 Table 2. Soil Abiotic and Biotic Characteristics of the Marshes at the Sites. DD TS WF QD DF SH WZ FZ ST ZH BH Jul. Dec. Jul. Dec. Jul. Dec. Jul. Dec. Jul. Dec. Jul. Dec. Jul. Dec. Jul. Dec. Jul. Dec. Jul. Dec. Jul. Dec. SD (g cm-3) 1.30 1.20 1.23 1.15 1.15 1.28 1.28 1.19 1.20 1.17 1.22 1.30 1.16 1.14 1.22 1.41 1.27 1.24 1.13 1.19 1.39 1.30 SWC (%) 58.8 55.9 59.8 58.9 54.7 54.0 50.3 52.8 56.5 64.9 69.2 67.4 57.7 65.2 63.8 65.6 56.4 62.6 57.1 63.4 58.8 70.8 pH 7.76 7.72 7.94 7.92 8.00 8.07 7.84 7.90 7.91 8.05 7.89 7.82 8.01 7.87 7.87 7.75 8.00 7.96 7.70 7.83 7.90 7.80 Eh (mV) -83 -61 -101 -54 -64 -32 -58 -43 -115 -89 -157 -108 -139 -87 -150 -110 -120 -81 -158 -109 -122 -120 Salinity (‰) 11.8 13.6 23.1 24.7 25.7 27.9 21.2 24.2 14.8 13.3 7.5 12.4 19.7 17.8 6.3 12.9 23.6 27.4 16.7 19.3 19.3 22.3 TOC (mg g-1) 2.93 3.41 3.14 2.62 1.09 1.34 2.00 1.84 6.09 5.04 7.04 7.97 5.25 6.24 10.2 9.43 8.00 4.00 8.00 8.61 7.89 7.94 - DOC (mg g 0.31 0.31 0.35 0.29 0.14 0.11 0.26 0.18 0.70 0.67 0.66 0.79 0.66 0.56 0.76 0.67 0.65 0.21 0.75 0.81 0.64 0.93 1 ) TN (mg g-1) 0.24 0.36 0.25 0.29 0.14 0.15 0.28 0.23 0.57 0.57 0.73 0.66 0.82 0.77 1.15 1.02 0.40 0.31 0.39 0.33 0.48 0.52 MBC (µg g-1) 60.6 49.6 50.5 43.3 16.8 25.3 29.4 19.8 22.1 11.7 84.3 60.8 87.9 49.6 113 81.6 105 61.3 94 71.0 113 40.7 -1 MBN (µg g ) 6.10 5.37 3.93 3.07 6.0 4.37 2.77 2.27 5.07 6.10 17.5 11.8 13.6 8.1 17.3 14.2 11.8 8.9 9.37 10.8 6.10 6.17 C/N 12.2 9.38 12.7 9.14 7.76 9.16 7.06 8.13 10.6 8.9 9.6 12.1 6.4 8.1 8.8 9.3 20.2 12.9 20.7 25.8 16.4 15.3 NH4+-N (µg 5.81 6.38 8.14 6.98 5.23 3.24 1.53 2.12 5.73 5.25 7.24 6.34 9.9 12.0 12.1 10.2 6.10 8.11 5.05 5.15 5.24 8.25 g-1) NOx–-N (µg 1.08 1.53 1.53 1.23 1.25 1.03 0.73 0.61 1.07 1.25 1.42 1.04 1.33 1.21 2.13 1.38 0.85 0.82 1.63 1.13 1.62 1.03 g-1) SO42- (mg g- 0.22 0.51 0.51 0.78 0.30 0.61 0.42 0.96 0.21 0.75 0.11 0.31 0.46 0.56 0.31 0.62 0.45 0.87 0.60 0.41 0.39 0.49 1 ) δ13C (‰) - - - - - - - - - - - - - - - - - - - - - - 26.1 25.1 24.4 24.2 22.3 21.6 23.2 22.3 23.2 25.3 20.4 24.2 23.3 20.3 24.1 20.9 22.4 23.6 23.5 22.2 21.3 21.0 δ15N (‰) 6.44 7.15 6.40 6.19 5.57 5.25 5.12 4.93 5.54 6.13 5.60 5.23 6.22 6.24 5.23 4.57 5.44 6.27 4.35 5.12 5.21 6.25 BA (×109) 3.7 4.1 5.2 5.2 7.0 2.9 4.3 2.6 4.0 1.3 3.8 6.4 9.0 11.3 5.7 5.4 4.1 6.7 7.2 1.1 3.9 6.4 –, – –; SD, soil density; SWC, soil-water content; Eh, redox potential; TOC, total organic carbon; DOC, dissolved organic carbon; TN, total nitrogen; NOx NO3 plus NO2 BA, bacterial abundance (copies g-1). Values are means of three replicates. See Table 1 for the site abbreviations. 2/6 Table 3. Emissions (means ± standard errors (n = 3)) of CH4, N2O and CO2 in the Marshes. CH4 (µg m-2 h-1) N2O (µg m-2 h-1) CO2 (mg m-2 h-1) Site December July December July December July DD 23.6±1.5 59.6±5.3 2.0±0.6 5.1±0.3 71.9±7.3 93.1±12.2 TS 38.1±6.3 96.2±9.8 4.1±0.8 3.9±0.3 15.9±1.7 59.0±6.0 WF 29.6±2. 8 29.0±4.6 5.4±0.4 10.4±1.2 9.9±1.2 51.4±0.9 QD 27.9±0.9 63.0±8.7 3.4±0.2 22.0±1.9 37.4±3.6 69.4±4.5 DF 48.3±5.9 60.7±3.6 4.7±1.3 6.6±0.7 14.1±2.5 50.9±5.3 SH 118±10.3 345±37.9 6.3±1.0 8.2±0.2 74.5±8.7 116±2.5 WZ 94.2±4.4 206±18.2 15.4±3.6 21.9±3.3 91.9±8.9 153±7.1 FZ 183±7.5 793±51.5 27.7±4.4 85.1±10.5 121±7.8 71.9±7.3 ST 115±5.2 274±30.9 103±9.6 30.7±3.4 258±28.1 115±16.3 ZH 126±9.4 482±36.0 25.0±2.9 56.4±1.7 310±22.4 151±9.0 BH 211±7.5 986±70.1 65.0±3.1 110±6.6 145±12.2 138±3.2 See Table 1 for the site abbreviations. 3/6 Table 4. Summary of the two-way ANOVA of the effects of site, season and their interaction on CH4, N2O and CO2 emissions. CH4 N2O CO2 Sum of df Mean F P Sum of df Mean F P Sum of df Mean F P squares square squares square squares square Intercept 2651579.224 1 2651579.224 4760.2 0.000 52754.038 1 52754.038 3507.524 0.000 722945.433 1 722945.433 5756.536 0.000 Site 2238343.925 10 223834.393 401.8 0.000 52932.993 10 5293.299 351.942 0.000 262718.368 10 26271.837 209.193 0.000 Season 771578.138 1 771578.138 1385.2 0.000 1328.991 1 1328.991 88.362 0.000 0.676 1 0.676 0.005 0.942 Site × Season 1018280.938 10 101828.094 182.8 0.000 16527.877 10 1652.788 109.891 0.000 88500.993 10 8850.099 70.470 0.000 Residuals 24509.414 44 557.032 661.771 44 15.040 5525.823 44 125.587 4/6 Table 5. Direct and partial (controlling for both air temperature and mean annual temperature) correlation analysis (Pearson's r) comparing the effects of the abiotic and biotic factors on the CH4, N2O and CO2 emissions (n = 22). CH4 N2O CO2 Direct Partial Direct Partial Direct Partial r P r P r P r P r P r P Abiotic factor SD 0.31 0.164 0.31 0.184 0.29 0.192 0.26 0.271 0.19 0.401 0.08 0.733 SWC 0.42 0.052 0.19 0.433 0.24 0.274 -0.35 0.134 0.31 0.164 0.05 0.828 pH -0.20 0.378 -0.27 0.246 -0.11 0.638 -0.06 0.809 -0.46 0.030 -0.60 0.005 Eh -0.87 0.000 -0.60 0.006 -0.54 0.009 0.54 0.015 -0.58 0.004 0.01 0.958 Salinity -0.37 0.089 -0.63 0.003 0.04 0.866 0.22 0.354 -0.16 0.488 -0.13 0.580 TOC 0.81 0.000 0.56 0.010 0.59 0.004 -0.31 0.184 0.55 0.008 0.04 0.858 DOC 0.69 0.000 0.32 0.171 0.44 0.041 -0.51 0.022 0.45 0.037 -0.06 0.801 TN 0.58 0.005 0.52 0.019 0.34 0.117 -0.05 0.836 0.25 0.272 -0.08 0.755 NH4+ 0.43 0.047 0.24 0.301 0.31 0.157 -0.02 0.939 0.32 0.147 0.08 0.724 NOx– 0.52 0.013 0.66 0.001 0.21 0.356 0.01 0.969 0.09 0.708 -0.16 0.492 SO42– -0.32 0.145 -0.26 0.267 -0.04 0.845 0.32 0.166 -0.27 0.224 -0.13 0.600 δ13C 0.29 0.191 -0.12 0.604 0.34 0.123 -0.09 0.721 0.22 0.323 -0.09 0.712 δ15N -0.37 0.092 -0.09 0.717 -0.36 0.096 -0.04 0.882 -0.09 0.693 0.29 0.210 C/N 0.42 0.050 -0.19 0.433 0.41 0.059 -0.31 0.189 0.53 0.011 0.23 0.324 Biotic factor MBC 0.88 0.000 0.76 0.000 0.62 0.002 0.004 0.988 0.61 0.003 0.19 0.414 MBN 0.67 0.001 0.39 0.088 0.42 0.049 -0.26 0.276 0.49 0.020 0.11 0.645 BA 0.29 0.193 -0.32 0.167 0.40 0.051 -0.002 0.995 0.64 0.001 0.49 0.029 SD, soil density; SWC, soil-water content; Eh, redox potential; TOC, total organic carbon; DOC, dissolved organic carbon; TN, total nitrogen; NOx–, NO3– plus NO2–; BA, bacterial abundance. 5/6 Table 6. Estimates of the Increases in the Emissions of the Greenhouse Gases in Response to the Scenarios of Global Climate Change (2 and 4 °C) and Associated Increases in the Amplitudes of the Greenhouse-Gas Emissions from the Temperate and Subtropical Marshes. Increased emission Temperate marshes Subtropical marshes 2 °C 4 °C 2 °C 4 °C Gas 2 °C 4 °C Current Current increase increase increase increase scenario scenario emission emission (%) (%) (%) (%) CH4 2.2 5.43 47.6 4.62 11.4 328 0.67 1.66 N2O 1.86 4.78 6.77 27.5 70.6 46.2 4.03 10.3 CO2 4.32 6.1 47.3 9.13 12.9 145 2.98 4.21 Units: µg m–2 y–1 for CH4 and N2O; mg m–2 y–1 for CO2. 6/6