鄂西南香蒲科、黑三棱科、眼子菜科和茨藻科植物的分布与生境的关系

鄂西南香蒲科、黑三棱科、眼子菜科和茨藻科植物的分布与生境的关系 ON THE RELATIONSHIPS BETWEEN THE DISTRIBUTION OF TYPHACEAE, SPARGANIACEAE, POTAMOGETONACEAE AND NAJADACEAE AND THEIR HABITAT 何景彪 first-author 周凌云 王徽勤 鄂西南这四科植物的分区,在水平方向上表现为:种类主要集中于宜昌—远安和利川—恩施两个区域。这与本区池塘和稻田等生境的分布状况密切相关。在垂直方向上,随海拔升高,眼子菜科和茨藻科植物种数和各个种的分布量减少,它们主要分布于海拔800米以下;但其余两科植物在一定海拔高程内,随海拔升高种数和各个种的分布量均有增加趋势。这与各科植物的生境密切相关联。水体类型、水的静流状态、水位涨落、水底基质、pH值、温度和人为因子是影响四科植物分布的重要生态因子。 As to the horizontal distribution, the number of the species of four families studied is chiefly concentrated in two areas- Yichang-Yuan’an and Lichuang-Enshi, Which is closely related to the distribution of such habitats as ponds and paddy fields etc.. In regard of the vertical distribution, the number and distributional amount of the species of Potamogetonaceae and Najadaecae tends to decrease with the altitude increasing, mainly, occurring below 800m alt., but the rest two exhibit the negative tendency to that of the first two within a certain range of alt., which also correlated to the habitat of each family. Finally,seven factors affecting the distribution of the families studied were discussed. 香蒲科 黑三棱科 眼子莱科 茨藻科 分布 生境 鄂西南 Typhaceae Sparganiaeeae Potamogetonaceae Najadaceae distribution habitat southwestern Hubei 1987-04-01 2021-04-01 4