Zoological Institute of the Russian Academy of Sciences, Universitetskaya emb. 1, St. Petersburg 199034, Russia.
Mar Pollut Bull. 2010;61(4-6):183-8. doi: 10.1016/j.marpolbul.2010.02.013. Epub 2010 Mar 27.
The biomass dynamics of the green alga Cladophora glomerata was studied in the shallow-water littoral zone of the Neva estuary during May-October of 2003-2005. Additionally, the average production rate of C. glomerata, the biomass of drifting algae and oxygen depletion were examined during period of algae decomposition. Two peaks in C. glomerata biomass, in July and in September, were observed during all years studied, reaching a maximum 300+/-100 g DW m(-2). The primary production of C. glomerata varied from 3.6 to 7.9 g C m(-2) contributing to around 90% of the total primary production in this habitat. From the middle of July to late August the biomass of drifting C. glomerata exceeded the biomass of the attached algae, accounting for 62% of the total algal biomass in shallow areas (0-1m). The hypoxia (a minimum oxygen level of 5% or 0.62 mg dm(-3)) in the water was recorded near shore (to 20-m distance from the shore), negatively influencing the quality of shallow-water habitats.
在 2003 年至 2005 年 5 月至 10 月期间，研究了绿藻胶球藻在涅瓦河口浅水区的生物量动态。此外，还研究了藻类分解期间胶球藻的平均生产力、漂流藻类的生物量和耗氧量。在所有研究的年份中，7 月和 9 月观察到胶球藻生物量的两个峰值，达到最大 300+/-100 g DW m(-2)。胶球藻的初级生产力从 3.6 到 7.9 g C m(-2)不等，对该生境的总初级生产力的贡献约为 90%。从中下旬 7 月到 8 月下旬，漂流的胶球藻的生物量超过了附着藻类的生物量，占浅水区（0-1m）总藻类生物量的 62%。在离海岸 20 米以内的近岸水域记录到缺氧（最低氧水平为 5%或 0.62 毫克/分升），对浅水生境的质量产生负面影响。
