哈萨克斯坦北部轮藻植物的分布与生态学研究(英文)

DISTRIBUTION AND ECOLOGY OF CHAROPHYTA IN THE NORTHERN KAZAKHSTAN

哈萨克斯坦北部已发现 2 6种轮藻植物 ,其中以 Kockchetav丘陵地区最为丰富。轮藻植物生长的盐度范围为0 .2— 4 4 .9g/L,一般生长于盐度不超过 1— 5 (8) g/L 的淡水或微咸水环境。在盐度高达 4 1.1— 4 4 .9g/L 的水体中 ,仅发现 L amprothamnium papulosum。轮藻植物生长的最大水深为 7m,多数种生长的水深不超过 1m。轮藻生长的主要底质类型为砂及粉砂质。一些种类如 Chara kirghisorum,C.glopbularis,C.tomentosa和 N itellopsis obtusa构成稳定的植被 ,而其它种类构成湖区周期性干涸环境中短时间生长的水生大型植物群落的一部分。

In the Northern Kazakhstan are known 26 species of Charophyta,with the most rich occurrence in Kockchetav Hills. Total range of salinity of the algal ecotopes is 0.2—44.9g/L, but most of the species develop in fresh or slightly saltish water with salinity not exceeding 1—5(8)g/L. Under hyperhaline conditions with salinity of 41.1—44.9g/L only Lamprothamnium papulosum was found. The maximum depth of Charophyta occurrence is 7 meters, and most of the species do not spread to the depth of 1 meter. The main types of sediments in the algal habitats are sand and gray silt. Some species such as Chara kirghisorum, C. glopbularis, C. tomentosa, and Nitellopsis obtusa form stable vegetations. The rest of the species are part of temporary groupings of hydromacrophytes on periodically drying parts of lakes.