Ferreira Fernando Alves, Mormul Roger Paulo, Thomaz Sidinei Magela, Pott Arnildo, Pott Vali Joana
Postgraduate Program in Ecology of Continental Aquatic Environments, Universidade Estadual de Maringá- UEM, Av. Colombo 5790, bloco H-90, CEP 87020-900, Maringá, Paraná, Brazil.
Rev Biol Trop. 2011 Jun;59(2):541-56.
Neotropical aquatic ecosystems have a rich aquatic flora. In this report, we have listed the aquatic flora of various habitats of the upper Paraná River floodplain by compiling data from literature and records of our own continuous collections conducted during the period 2007-2009. Our main purposes were to assess the macrophyte richness in the Paraná floodplain, to compare it with other South American wetlands and to assess whether the number of species recorded in South American inventories has already reached an asymptote. We recorded a total of 153 species of macrophytes in the Upper Paraná River floodplain, belonging to 100 genera and 47 families. In our comparative analysis, a clear floristic split from other South American wetlands was shown, except for the Pantanal, which is the closest wetland to the Paraná floodplain and, therefore, could be considered a floristic extension of the Pantanal. The species accumulation curve provides evidence that sampling efforts should be reinforced in order to compile a macrophyte flora census for South America. The high dissimilarity among South American wetlands, together with the lack of an asymptote in our species accumulation curve, indicates that the sampling effort needs to be increased to account for the actual species richness of macrophytes in this region.
新热带水生生态系统拥有丰富的水生植物群。在本报告中，我们通过汇编文献数据以及我们在2007 - 2009年期间持续采集的记录，列出了巴拉那河上游洪泛平原不同生境的水生植物群。我们的主要目的是评估巴拉那河洪泛平原大型植物的丰富度，将其与其他南美湿地进行比较，并评估南美植物清单中记录的物种数量是否已达到渐近线。我们在巴拉那河上游洪泛平原共记录了153种大型植物，隶属于100属47科。在我们的比较分析中，除了潘塔纳尔湿地外，与其他南美湿地呈现出明显的植物区系差异，潘塔纳尔湿地是离巴拉那河洪泛平原最近的湿地，因此可被视为潘塔纳尔湿地的植物区系延伸。物种积累曲线表明，为了编制南美大型植物区系普查，应加强采样工作。南美湿地之间的高度差异，以及我们的物种积累曲线中没有渐近线，表明需要增加采样工作，以反映该地区大型植物的实际物种丰富度。
