Climate-warming-driven sea level rise may change the vegetation composition of coastal wetlands, influencing ecosystem functions including photosynthetic activity, biomass production, litter decomposability and nutrient cycling. Litter decomposition rates of the most dominant macrophytes, Phragmites australis, Carex sp. and Schoenoplectus tabernaemontani, in two nearby freshwater and oligohaline peatlands were compared to determine the impact of salinity on litter decomposition. Electrical conductivity difference of 1.2–8.0 mS cm^-1 (mean difference = 4.8 mS cm^-1) between freshwater and oligohaline peatlands did not significantly affect the decomposition of macrophyte litter. Between species, S. tabernaemontani lost a significantly higher mass (29%) in the first month of decomposition compared to P. australis and Carex sp. Overall, litter decay rates for S. tabernaemontani was k = 0.0064–0.0078 d^-1 while P. australis and Carex sp. both had k = 0.0017–0.0028 d^-1. After one year, S. tabernaemontani litter was totally decomposed while the other species had 40–60% mass remaining relative to their initial dry mass confirming that P. australis and Carex sp. contribute to peat formation while S. tabernaemontani does not. Apparent differences in decomposition kinetics between S. tabernaemontani and the other species tested indicated that litter quality, especially C:P, C:N, N:P and C:Ca, is of great importance for both microbial colonization (initial phase) as well as for sustaining decomposition after colonization. This study shows that litter quality controls litter decomposition more than narrow salinity ranges. Hence, we suggest that sea level rise, combined with increased precipitation, may not have significant impact on the decomposition of these macrophytes in the future. However, sea level rise may lead to changes in vegetation composition replacing the peat-forming species by S. tabernaemontani which favors relatively deep, oligohaline wetlands. This would eventually affect carbon sequestration rates.

气候变暖导致的海平面上升可能会改变沿海湿地的植被组成，影响生态系统功能，包括光合活动、生物量生产、凋落物可分解性和养分循环。最主要的大型植物，芦苇，苔草属植物的凋落物分解率。和Schoenoplectus tabernaemontani，在两个附近的淡水和贫盐泥炭地中进行了比较，以确定盐度对凋落物分解的影响。淡水和贫盐泥炭地之间1.2-8.0 mS cm ^{-1 的}电导率差异（平均差异= 4.8 mS cm ^-1）对大型植物凋落物的分解没有显着影响。物种之间，与P. australis和Carex sp.相比，S. tabernaemontani在分解的第一个月损失了显着更高的质量 (29%) 。总体而言，垫料衰减率S. tabernaemontani是ķ  = 0.0064-0.0078 d ^-1而芦苇和苔草属。两者都有k  = 0.0017–0.0028 d ^-1。一年后，S. tabernaemontani垃圾完全分解，而其他物种相对于其初始干重剩余 40-60% 的质量，这证实了P. australis和Carex sp。有助于泥炭的形成，而S. tabernaemontani才不是。S. tabernaemontani和其他测试物种之间分解动力学的明显差异表明，垫料质量，尤其是 C:P、C:N、N:P 和 C:Ca，对于微生物定植（初始阶段）也非常重要至于定植后的持续分解。这项研究表明，凋落物质量比狭窄的盐度范围更能控制凋落物分解。因此，我们认为海平面上升，加上降水增加，未来可能不会对这些大型植物的分解产生重大影响。然而，海平面上升可能导致植被组成发生变化，以取代S. tabernaemontani的泥炭形成物种这有利于相对较深的少盐湿地。这最终会影响碳封存率。