BackgroundAlthough intermittent rivers account for over half of the global fluvial network and could increase in length and quantity in Mediterranean climates (in response to climate changes), there is little documentation of organic matter input to them. This study was made possible by the cooperation of the Concepción Chiguayante School community and the Explora project (Chile), with the support of citizen science. The aim was to compare coarse particulate organic matter quantities and types in the Lonquén basin.MethodsSamplings were performed in two perennial rivers and two intermittent rivers. First, the riparian vegetation of the streams was characterized through photointerpretation and subsequently the organic matter accumulated in the selected river beds was quantified and typified. Spearman’s correlation was used.ResultsThe riparian vegetation was similar in both types of rivers, though significantly greater (p < 0.05) plant material accumulation was found in intermittent rivers compared to perennial rivers (1029 and 337 g m− 2, respectively). Likewise, there was a significant relationship among leaves, smaller organic matter, seeds, herbs and shrubs in intermittent rivers.ConclusionsThe results reveal the importance of the intermittent rivers that were sampled as transitory reservoirs of organic matter with high productive potential, especially in the first flood pulses, when this material is transported downstream.

中文翻译：

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在公民科学的支持下，智利地中海间歇性和常年河流中有机质的比较

背景虽然间歇性河流占全球河流网络的一半以上，并且在地中海气候中长度和数量可能会增加（以应对气候变化），但几乎没有关于输入它们的有机物质的记录。在公民科学的支持下，Concepción Chiguayante 学校社区和 Explora 项目（智利）的合作使这项研究成为可能。目的是比较 Lonquén 盆地中粗颗粒有机物的数量和类型。方法在两条多年生河流和两条间歇性河流中进行了采样。首先，河流的河岸植被通过光解来表征，随后在选定河床中积累的有机物质被量化和典型化。使用了斯皮尔曼相关性。结果两种河流的河岸植被相似，但与多年生河流（分别为 1029 和 337 g m− 2）相比，间歇性河流中的植物物质积累显着更多（p < 0.05）。同样，断断续续的河流中的叶子、较小的有机质、种子、草本植物和灌木之间也存在显着的关系。结论结果揭示了作为具有高生产潜力的有机物质的过渡性水库采样的断续河流的重要性，特别是在第一阶段洪水脉冲，当这种材料向下游运输时。