To understand the mechanism of how Phragmites australis makes valuable floating mat biotopes under oligotrophic conditions, we investigated the environmental (water chemistry) and vegetational characteristics (growth, plant species richness, and floristic composition) of a floating mat consisting of three main mat-forming species with a zonal distribution (P. australis on the land side of the floating mat, Zizania latifolia on the middle area, and Typha angustifolia on the water side). Although they showed relatively low growth in the floating mat, compared to those in land-based wetlands, P. australis grew better than other mat-forming species in terms of shoot height and biomass production. Specifically, P. australis made more below-ground parts (593 ± 38 g/m²) than other mat-forming species (Z. latifolia, 100 ± 10 g/m²; T. angustifolia, 167 ± 8 g/m²) and more companion species were found in P. australis-dominated plots (8.5 ± 1.0 species/m²) than other plots (Z. latifolia-dominated plots, 2.7 ± 0.6 species/m²; T. angustifolia-dominated plots, 1.0 ± 0.0 species/m²). The larger amount of below-ground P. australis parts could contribute to thicker and denser mat structures, possibly providing more favorable habitats for neighboring plant species, thus facilitating more companion species within the P. australis-dominated area of the mat.

为了了解芦苇如何在贫营养条件下形成有价值的漂浮垫生物群落的机理，我们研究了由三种主要形成垫的漂浮垫组成的环境（水化学）和植被特征（生长，植物物种丰富度和植物组成）具有带状分布的物种（在浮垫的陆地侧为澳大利亚野猪，在中部区域为Zizania latifolia，在水侧为香蒲）。尽管它们在浮垫上的生长速度相对较低，但与陆基湿地相比，在枝条高度和生物量生产方面，澳大利亚P. australis的生长要好于其他形成垫的物种。特别，芦苇更加地下部位（593±38克/米²）比其它垫形成种类（菰，100±10克/米² ; T.沙枣，167±8克/米²）和与其他田地（以阔叶木兰为主导的样地，2.7±0.6种/ m ²）相比，在其他以P. austtralis为主的样地（8.5±1.0种/ m ²）中发现了更多的伴生物种;由T. angustifolia为主的样地，1.0±0.0种/ m ²）。大量的地下P. Australis某些部分可能会导致垫子结构更厚，更密，可能为邻近的植物物种提供更有利的栖息地，从而有利于在以澳大利亚对虾为主的垫子区域内更多的伴侣物种。