In this field observation we also find an important fact that , even during storm surge period , high tidal flat can still be in sedimentation in some place , no erosion occurred . to tell the typhoon storm surges from cold wave storm surges , 12 monthly sedimentary samples are collected from the modern tidal flat surface at dafeng , jiangsu . palynological analysis of these samples indicates that the seasonal palynological features of the tidal flat sediment are very obvious and some palynological indexes , such as taxon percentage of arboreal , herbaceous pollen and spore , are good indicators to tell the seasonality of the tidal flat deposits 为区分风暴潮沉积是由台风引致还是由寒流或冷锋引致，对长期处于淤积状态的江苏中部大丰县斗龙港附近潮滩，采集了一年中每月小潮期间滩面表层泥样，并在启东茅家港滩面分别采集了6月、 9月与12月的表层泥样，在实验室中，对这些样品进行孢粉等分析，认为在以粉砂、泥为主的潮滩沉积中，孢粉种类百分比，尤其是木本种类占孢粉总种类的百分比是判别季节性潮滩的重要指标，通过启东茅家港工程建设区淤积状况的观测记录对这一判别指标进行了验证。
The paper investigated the monthly biomass dynamics of grass layer of different plant communities in dafeng national david ' s deer nature reserve , which increased from may to september , the percentages of pennisetum virdis ( l . ) beauv . biomass were from 61 . 15 % to 85 . 57 % during may to september 摘要测定了大丰国家级麋鹿保护区圈养区内不同类型植物群落草本层总生物量随月份变化动态，结果表明，植物群落的总生物量从5月份至9月份呈增加趋势，其中狼尾草种群生物量占总生物量的比例从5月份的61 . 15 %增加到9月份的85 . 57 % 。
