论文部分内容阅读
分析了TOC、TN和TP在苏北潮滩湿地不同生态带沉积物和植被中的分布状况,结果表明:TOC和TN的水平和垂向平均含量以互花米草滩为最高,其次分别为盐蒿滩、芦苇滩和光滩。TP的平均含量以光滩为最高,依次由海向陆逐渐减小。在生物量最大期间(秋季),单位面积上互花米草体内TOC、TN和TP的累积量远大于盐蒿和芦苇。互花米草主要通过以下4个方面对研究区潮滩湿地TOC、TN和TP的分布产生影响:(1)互花米草滩面较高的沉积速率;(2)互花米草对整个潮滩湿地不同植被分布格局的改变;(3)互花米草有着高生产力以及巨大的地下生物量;(4)互花米草的生长特性使其在生长过程中对磷的需求量很大。
The distribution of TOC, TN and TP in the sediments and vegetation of different ecological belts of tidal flat wetlands in northern Jiangsu were analyzed. The results showed that the horizontal and vertical average contents of TOC and TN were the highest in Spartina alterniflora, followed by Sallow Sea Beach , Reed beach and light beach. The average content of TP to light beach is highest, followed by the sea to land gradually reduced. In the period of maximum biomass (autumn), the accumulations of TOC, TN and TP in Spartina alterniflora per unit area were much larger than those of Artemisia annua and Phragmites communis. Spartina alterniflora affects the distribution of TOC, TN and TP in tidal flat wetlands mainly in the following four aspects: (1) higher sedimentation rate of Spartina alterniflora; (2) (3) Spartina alterniflora has high productivity and huge underground biomass; (4) The growth characteristics of Spartina alterniflora has a great demand for phosphorus in the growth process.