Siliceous protozoan plates in lake sediments
Siliceous protozoan plates in lake sediments
复制标题
湖泊沉积物中的硅质原生动物板块
作者：
M. Douglas;J. Smol
某些有壳变形虫的硅化板块具有成为有用的古指示物的必要特征。这些板块通常在沉积矿床中储量丰富且保存完好，可以使用与其他硅质微体化石相同的制备技术进行研究。个别板块通常可以确定的属，在某些情况下，物种的水平。对38个阿迪朗达克山（纽约州）湖泊表层（顶部厘米）沉积物中记录的板块进行的初步调查表明，这些甲壳类动物可能比湖水特征更能反映集水特征（例如沼泽发育）。硅质，种特异性的规模的太阳虫也被证明保存在沉积剖面。
The silicified plates of certain testate amoebae have the necessary characteristics to be useful paleoindicators. These plates are usually abundant and well preserved in sedimentary deposits, where they can be studied using the same preparation techniques developed for other siliceous microfossils. Individual plates can usually be identified to the generic and, in some cases, to the species level. A preliminary survey of plates recorded in the surficial (top centimetre) sediments of 38 Adirondack Mountain (NY) lakes suggests that these testaceans may reflect catchment features (e.g. bog development) more closely than lakewater characteristics. The siliceous, species-specific scales of heliozoans are also shown to preserve in sedimentary profiles.