The decomposition of a single macrophytes species may not represent entirely the carbon cycling in aquatic ecosystems, as in the freshwater macrophyte-dominant environments several species grow and decay concomitantly. To assess the interaction of the two species in the decomposition process, the temporal variation of particulate organic carbon (POC) of Hedychium coronarium J. König, Typha domingensis Persoon and the mixed sample (50% of each species) was mathematically modeled. Kinetic models were used to verify the temperature and the availability of dissolved oxygen, as regulating factors in decomposition. The aerobic processes favored a faster decay when compared to anaerobic processes. The occurrence of two phases in decomposition was observed: (1) with a rapid mass loss (POC LS ) and (2) with a slow degradation (POC R ). During the aerobic decomposition, independently of variation in temperature, the effect was always antagonistic. However, under anaerobic conditions, the three types were observed (antagonistic, additive and synergic). The mixed detritus always displayed the highest Q 10 coefficient. Modeling mixed detritus decomposition was a reliable predictive framework of litter decomposition at a ecosystemic scale, improving ecosystem response of carbon cycling feedback under an increasing temperature.

中文翻译：

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两种水生大型植物的分解动力学：凋落物相互作用对温度和溶解氧可用性的响应

单个大型植物物种的分解可能并不完全代表水生生态系统中的碳循环，因为在淡水大型植物占主导地位的环境中，几个物种同时生长和腐烂。为了评估两个物种在分解过程中的相互作用，对 Hedychium coronarium J. König、Typha domingensis Persoon 和混合样本（每种物种的 50%）的颗粒有机碳 (POC) 的时间变化进行了数学建模。动力学模型用于验证温度和溶解氧的可用性，作为分解的调节因素。与厌氧过程相比，有氧过程有利于更快的衰减。观察到分解中出现两个阶段：(1) 快速质量损失 (POC LS ) 和 (2) 缓慢降解 (POC R )。在好氧分解过程中，独立于温度的变化，效果总是拮抗的。然而，在厌氧条件下，观察到了三种类型（拮抗、相加和协同）。混合碎屑始终显示最高的 Q 10 系数。模拟混合碎屑分解是生态系统尺度上凋落物分解的可靠预测框架，可改善温度升高下碳循环反馈的生态系统响应。