The present study investigates the macrophytes diversity from selected aquatic ecosystems in South‐Western Nigeria using quadrat method. The survey revealed two major aquatic ecosystem types (mangrove and freshwater swamp) and recorded a total of 83 species belonging to 77 genera and 41 families. Three species (Sacciolepis africana, Ipomoea asarifolia and Commelina diffusa) were found present in all the surveyed areas. However, species such as Acrostichum aureum, Avicennia germinans and Rhizophora racemosa were restricted in its distribution. Poaceae and Ludwigia were the dominant family and genus, respectively. In addition, our study recorded Hallea ledermannii classified as vulnerable by IUCN Red List. Diversity analysis revealed high species richness in all the studied locations especially in Lagos State. Similar diversity pattern was observed for Osun and Oyo States. Further, our results reflect that macrophytes assemblages in South‐Western Nigeria could be influenced by human activities. Hence, we recommend further studies that would test hypothesis on how human activities affect the diversity and distribution of flora in the area. Additionally, conservation of the aquatic environments of the region appears necessary. The findings of this study provide insights on the patterns of macrophyte diversity in South‐Western Nigeria, thus, forms a guideline for initiating effective conservation policies in the area.

中文翻译：

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尼日利亚西南部某些生态系统中水生植物的多样性和分布模式

本研究使用正交方法研究了尼日利亚西南部某些水生生态系统中的大型植物多样性。该调查揭示了两种主要的水生生态系统类型（红树林和淡水沼泽），并记录了属于77属41个科的总共83种。在所有调查区域中发现了三种物种（非洲沙门氏菌（Sacciolepis africana），细叶番薯（Ipomoea asarifolia）和白花Commelina diffusa）。但是，诸如金黄色奇缘菌，Avicennia microinans和Rhizophora racemosa的分布受到限制。禾本科和路德维希分别是主要的科和属。另外，我们的研究记录被世界自然保护联盟红色名录归类为易受伤害的哈雷。多样性分析显示，在所有研究地点，特别是在拉各斯州，物种丰富度很高。在奥孙州和奥约州观察到类似的多样性格局。此外，我们的结果反映出尼日利亚西南部的大型植物群落可能受到人类活动的影响。因此，我们建议进行进一步的研究，以检验关于人类活动如何影响该地区植物群落多样性和分布的假设。另外，保护该地区的水生环境似乎是必要的。这项研究的发现提供了对尼日利亚西南部大型植物多样性模式的见解，从而为在该地区启动有效的保护政策提供了指导。