水深梯度下湿地植被空间分布与生态适应  

Spatial distribution and ecological adaptability of wetland vegetation in Yellow River Delta along a water table depth gradient.

作　　者：谭学界[1] 赵欣胜[1] 

机构地区：[1]北京师范大学环境学院环境模拟与污染控制国家重点联合实验室,北京100875

出　　处：《生态学杂志》2006年第12期1460-1464,共5页Chinese Journal of Ecology

基　　金：国家自然科学基金重点资助项目(50239020)。

摘　　要：采用模糊数学排序方法对黄河三角洲国家级自然保护区不同水深梯度下芦苇湿地植被进行了研究,揭示了水深对植被空间分布的影响。结果表明,不同水深梯度下植物生境和群落类型都表现出较大差异,水深-30~40 cm,为水陆过渡地带,旱生、水生植物并存,物种最为丰富,该段水深上植被盖度最大;水深在-30^-50 cm,由于地下水深较低,该段水深是研究区盐碱化程度最大处;水深低于-50 cm时,地表较为干旱,盐碱化程度有所降低,植被类型被耐干旱植被代替。不同水深梯度影响了土壤水分、空气和土壤的生物、物理、化学过程,引起植被生长环境中土壤水分、盐碱化程度的改变,进而对植被空间分布和植被生态特征产生影响。The study with fuzzy set ordination （FSO） showed that in the National Nature Reserve in Yellow River Delta, there was a greater difference in plant habitat and vegetation type along a water table depth gradient. At the place with 40 cm to - 30 cm water table depth, a transitional belt from water body to land, xerophiles and hydrophytes coexisted, plant species were most abundant, and vegetation coverage was the largest. At the place of - 30 cm to - 50 cm water table depth, soil salinization and alkalization had the highest degree because of the lower ground water level, while at the place with 〈 - 50 cm water table depth, soil surface was relatively dry, salinization and alkalization had a lower degree, and drought-tolerant vegetation took dora inant place. Water table depth gradient had significant effects on soil moisture and air condition and soil physical, chemical and biological processes, and accordingly, affected the spatial distribution and ecological characters of the vegetations in the test region.

关 键 词：黄河三角洲 水深梯度 模糊数学排序 生态适应 

分 类 号：Q948[生物学—植物学]