Fig. 1
Temperate rainforest ecohydrology and seasonal conditions. a Conceptual model of seasonal and ecohydrological effects on carbon flux in a temperate rainforest landscape, including carbon pool and net gas flux ranges. Range (min to max) provided for key measurements. Major changes between dry and wet periods are indicated with arrows shaded by effect type: blue arrow, carbon concentration or flux rate; green arrow, relative abundance of putatively-active microbial groups. Arrows facing up indicate net positive change from dry period to wet period. Ecohydrological sites correspond to typical landscape positions, with bog forests occupying poorly drained slopes and ombrotrophic peatlands occupying flatter sites on higher slope positions. b Mean monthly DOC flux from seven adjacent watersheds averaging 6.7 km2 (data from [22]). c Soil microclimate variables: mean monthly temperature, air temperature at sampling; mean monthly rainfall, 24-h rainfall at sampling, mean monthly water table depth (WTD), WTD at sampling. d Soil chemistry variables which did not have a significant seasonal variation component (Supplementary Figure 3) provided by depth and ecohydrology (site). Variables with significant seasonal effects provided as the mean of three depths. e Mixed-chamber net soil CO2 and CH4 flux. Samples corresponding to soil microbial sampling highlighted in gray. Full soil microclimate, chemistry, DOC, and gas flux data, and analysis in Supplementary Figures 2–6. p Values following ANOVA are denoted by asterisks for differences between bog forest and peat bog sites at each date or depth (*p < 0.05)
