Landscape Change Affects Soil Organic Carbon Mineralization and Greenhouse Gas Production in Coastal Wetlands (original) (raw)

Wetlands are considered to be among the most productive but vulnerable ecosystems (Kirwan & Megonigal, 2013; Su et al., 2021; Wen et al., 2019). Despite covering just 4%-6% of the total land area, wetlands hold approximately 450 Pg of the global soil carbon, representing 25%-30% of the terrestrial biosphere carbon pool (Kayranli et al., 2010). Coastal wetlands are a crucial sink in the global carbon cycle due to high sedimentation rate and burial of organic matter (Drake et al., 2015; Packalen et al., 2014; Zhang, Bai, et al., 2021), and it is estimated that coastal wetlands globally store at least 53.7 Tg C yr −1 (Wang et al., 2021). However, wetland habitats have been impacted around the world, and despite international initiative to protect these habitats (e.g., Ramsar Convention on Wetlands), wetland degradation and loss rate remain high in Asia (Davidson, 2014), potentially altering the land's carbon source-sink dynamics over different time and spatial scales (Mitsch et al., 2013).