图1. 潮汐作用下氮(N)输入对盐沼湿地碳(C)循环关键过程的影响。周期性潮汐作用将近岸富营养水体中的氮带入滨海盐沼湿地生态系统中, 改变盐沼湿地土壤营养元素的化学计量关系, 进而对盐沼植物的光合作用及光合产物分配、植物呼吸作用、土壤有机碳分解、可溶性有机碳(DOC)流失等碳循环关键过程产生重要影响。DIC, 可溶性无机碳; POC, 颗粒有机碳。

Fig. 1. Effect of nitrogen (N) input under tidal action on key processes of carbon (C) cycle in a salt marsh. Periodic tides bring N from nearshore eutrophic water into coastal salt marsh ecosystems, changing the stoichiometric relationship of soil nutrient elements in salt marsh wetland. The exogenous N input could have important impacts on the key processes of carbon cycle, such as photosynthesis and respiration of plants, distribution of photosynthetic products, decomposition of soil organic carbon and loss of dissolved organic carbon (DOC). DIC, dissolved inorganic carbon; POC, particulate organic carbon.