金藻孢囊在水环境变化研究中的应用

金藻孢囊是金藻生殖过程的特有产物,在淡水环境中广泛存在,其硅质外壳易在沉积物中保存。金藻孢囊的孔、领、环带以及表面纹饰特征是其鉴定分类的主要依据。金藻孢囊对水环境变化响应敏感,因而被广泛应用于水环境变化研究中,包括古温度和古水文重建、水体富营养化和酸化评估等领域。已有的研究主要集中在北美和欧洲地区,其他区域研究相对较少。相比于其他生物指标,金藻孢囊鉴定相对复杂,不利于其广泛应用。因此,未来应优化金藻孢囊鉴定分类方法,提高鉴定统计效率。其次,加强金藻孢囊的现代过程调查,尤其在欧洲和北美以外的地区,以揭示全球不同地区金藻孢囊多样性及其生态属性。在此基础上,加强金藻孢囊在泥炭地环境演变、生物地理学等研究领域的应用。

Applications of chrysophyte stomatocysts in studies of aquatic environmental change

Stomatocysts are produced specifically by chrysophytes and distributed widely in freshwater environments, with siliceous shells well preserved in deposits. The main characteristics for the identification and classification of stomatocysts include pore, collar, annulus, and ornamentation. Because of their sensitivity to aquatic environmental changes, chrysophyte stomatocysts are broadly used in studies of aquatic environmental change, including reconstruction of paleotemperature and paleohydrology and assessment of lake eutrophication and acidification. Existing studies are mainly conducted in North America and Europe but few investigations exist in other regions. Compared with other bioindicators, the identification of stomatocysts is much more complex, probably limiting their broad application. Future studies should improve the identification and classification methods of stomatocysts in order to promote efficiency of identification and counting. Furthermore, modern investigation of stomatocysts should be strengthened to reveal global stomatocyst diversity and their ecological attributes, particularly in regions outside of Europe and North America. On these bases, applications of stomatocysts in the fields of peatland environmental change and biogeography should be strengthened.