凌河高等植物初步调查

通过2013年6月末、10月末2次调查,在大凌河、小凌河的上、中、下游共采集到水生高等植物有15种,沿岸湿生植物34种。水生植物主要以单子叶植物纲眼子菜科的沉水植物为主。小凌河高等植物种类明显少于于大凌河。大凌河的高等植物种类呈现从上游到下游越来越少的变化规律,在一定程度上体现出大凌河从上游到下游环境质量下降的特点。河流沿岸的湿生高等植物物种丰富度低,且绝大多数为一年生植物,没有明显的优势种,说明凌河高等植物群落处于受干扰后恢复的演替初期。由于凌河受多种因素干扰的历史较长,群落结构亟待恢复。建议通过进一步的环境管理和工程措施促进水生、湿生植被的良性发展。

A survey on advanced plants of Linghe River

A survey of advanced plants on the upper reaches,middle reaches and lower reaches of Da Linghe River and Xiao Linghe River was carried at the end of June and October in 2013.15 hydrophyte and 34 hygrophyte species were collected in total.Hydrophytes which belong to potamogetopaceae were dominant.Plant species in Xiao Linghe River were less than in that of Da Linghe River which meant that the human interferences were more serious in Xiao Linghe River.Plant species decreased from upper reaches to lower reaches of Da Linghe River and this phenomenon showed that water environment changed from upper to lower reaches.Hygrophyte richness was low along the Linghe River and no obvious dominant species.Most of them were annual plant.Because of the long term disturbance the plant community of Linghe River was in the preliminary stage of success.A further environmental administration and ecological engineering should be taken to promote the development of plant community both in water and along the bank of Linghe river.