通过对呼兰河口湿地自然保护区内植被区系进行的研究，结果表明：以禾本科、莎草科的中生、湿生、沼生及水生植物为优势的草甸、沼泽、水生植被类型是该区的主要类型；群落结构与生态系统组成相对森林简单，植物种类也较森林少，共计70科，244属，465种，其植物种类约占黑龙江省植物种类的28．28％左右；种子植物区系成分东北植物区系占第一位，华北植物区系占第二位，东北平原亚区占第三位，少许大兴安岭植物区和东蒙古草原亚区种类；该区属的地理分布区类型以温带成分占优势，世界广布种亦占有较大比重。其优势植物是中生的禾本科植物小叶章、湿生的莎草科植物修氏苔草及沼生的禾本科植物芦苇、莎草科植物毛果苔草、漂筏苔草等，形成了独具特色的草本湿地。%Vegetation flora in Hulan estuarine wetlands area was studied .Meadow ,marsh & aquatic vegetation types are the main types for mesophyte ,hygrophyte & marsh plants of poaceae & sedge ;community structure & ecosys-tem components in this nature reserve is relatively simple than that of forest ,and its plant species are less than that of forest ;a total of 70 families ,244 genera and 465 kinds ,which accounts for about 28 .28% in plant species of Hei-longjiang Province .Seed flora:northeast flora accounted for the first one ;north flora is in the second place ;the northeast plain sub-region accounted for the third place ,and there is a little Daxing’anling flora and the species in sub-region of Eastern Mongolian prairie .The temperate zone of the geographical distribution types belonged to Hu-lan Estuary Wetlands Nature Reserve is dominant .The world’s widely distributed species also account for a large proportion .The advantaged plants are Deyeuxia angustifolia (mesophytic grass family) ,Carex schmidtii (hygric sedge family) ,Phragmites australis (marsh sedge family) ,Carex lasiocarpa(sedge family) ,Carex pseudocuraica (sedge family) etc .,forming a unique herbaceous wetland characteristics .
展开▼
