潮汐盐沼是海洋边缘海环境的最边缘部分,是海陆过渡的真正边界。盐沼环境因素具明显的垂直分带性,各环境参数变化是典型的海洋或陆地不可相比的,盐沼坡度平缓,由海向陆的环境变化在这里分异清楚;沉积中垂向变化平面上得到极大的放大等。据国外研究,盐沼环境控制着有孔虫的特征和分布,利用盐沼有孔虫的垂直分带恢复古海平面变化,精确到±20cm,甚至±5cm,这在海面变化、环境演变、全球变化研究上有重要意义
The tidal saltmarsh is the most marginal part of the marginal marineenvironments and the exact limit between marine and continent. Saltmarst has some sedimentary environmental Characteristics: the obvious vertical zonation of various environmental factors; greatvariations of every environmental parameter, compared with typical marine or terrene environment; a slight slope, on which the environmental succession from marine to continent is clearly divided and the vertical environmental succession in sediments is greatly amplified in lateral plane and so on. Tidal saltmarsh environment controls the features and distribution of saltmarsh foraminifera. According to the study abroad, the vetical zonation of saltmarsh foraminifera can be used as indicators for relocating former sea levels to an accuracy of ?20cm, even ?5cm. This quite high accuracy is important for studying sea level change, environment evolution and global change.
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