This paper evaluates the chemical composition of reed stands grown in different riverine habitats. In addition to the total concentrations, we first present data on the bio-available element fractions of the sediment of reed stands.

The results demonstrate clear separation between the plant and sediment samples and reveal the same concentration order of organs in all of the investigated sites irrespective of the water depth and water level fluctuation of the habitats.

In reed stands with static water depth gradient, both the total and the bio-available element concentrations of the sediment increase towards the deep water. In habitats regularly flooded by the river, the deposition of suspended matter homogenizes the surface layer of the sediment and, therefore, total element concentrations in that layer is not influenced by the deepening river bed. After the flood event, however, the water depth gradient does influence the bio-available fractions. Finally, it is also demonstrated that chemistry in reed stands can indicate redox conditions in the rhizosphere and anthropogenic pollution sources.

本文评估了在不同河流生境中生长的芦苇林的化学成分。除了总浓度外，我们首先提供有关芦苇林沉积物生物可利用元素分数的数据。

结果表明，植物和沉积物样品之间的分离清晰，并揭示了所有调查地点的器官浓度顺序相同，而与生境的水深和水位波动无关。

在具有静态水深梯度的芦苇林中，沉积物的总和生物利用元素浓度都朝着深水增加。在经常被河水淹没的栖息地中，悬浮物的沉积使沉积物的表层均匀，因此，该层中的总元素浓度不受加深河床的影响。但是，在洪水事件发生后，水深梯度确实会影响生物可利用部分。最后，还证明了芦苇林中的化学物质可以指示根际和人为污染源中的氧化还原条件。