Stream functioning is affected by allochthonous and autochthonous energy sources, organic matter decomposition and the structure and composition of the aquatic community. The presence of non-native tree species in the riparian zone may affect stream functioning. Thus, we quantified the allochthonous organic matter input to streams from native tree species and Hovenia dulcis, a non-native species, over a year, and we evaluated litter colonization and decomposition by aquatic invertebrates. The input of native organic matter was greater in Winter and Spring. On the other hand, the input of H. dulcis was higher in Autumn. The annual contribution of native organic matter was twofold greater than that of H. dulcis and was correlated with rainfall. H. dulcis leaf litter had decomposition rates that were three- to fourfold greater than those of native leaf litter. The invertebrate abundance and richness, and functional feeding groups did not vary between native and non-native leaf litter. We conclude that the presence of H. dulcis in the riparian zone changed the input patterns of allochthonous organic matter into streams. Furthermore, H. dulcis litter broke down faster than that of native species and did not directly affect the associated invertebrate community. However, the dominance of this species in riparian zones causes homogenisation of environment, resulting in changes in the composition of other biological communities (e.g., fungi and fish).

河流功能受外地和本土能源、有机物分解以及水生群落结构和组成的影响。河岸带非本地树种的存在可能会影响河流功能。因此，我们量化了一年多来本地树种和枳椇（一种非本地物种）输入溪流的外来有机物质，并评估了水生无脊椎动物的凋落物定植和分解。冬季和春季天然有机质的输入量较大。另一方面，H. dulcis的输入在秋季较高。原生有机质的年贡献是H. dulcis的两倍，并且与降雨量相关。H. dulcis枯枝落叶的分解率是原生枯枝落叶的三到四倍。无脊椎动物丰度和丰富度以及功能性摄食组在原生和非原生落叶之间没有差异。我们得出结论，河岸带中H. dulcis的存在改变了外地有机物质进入溪流的输入模式。此外，H. dulcis凋落物的分解速度比本地物种快，并且不直接影响相关的无脊椎动物群落。然而，该物种在河岸带的优势导致环境同质化，导致其他生物群落（例如真菌和鱼类）的组成发生变化。