Phytoplankton biomass, diversity, functional groups (FGs), and environmental parameters in three shallow lakes were evaluated to show the inter-annual fluctuations in precipitation, lake surface area, and wind speed which might affect the community structure and distribution of phytoplankton. Three lakes (Taşkısığı, Little Akgöl, and Poyrazlar) in Sakarya province (Turkey) were sampled taking into account two periods (Period A and Period B). Monthly (PRE)–daily (dPRE) total precipitation, lake surface area, and monthly (WD)–daily (dWD) average wind speed values were obtained higher in Period B. Moreover, in Period B, probably due to increased runoff, high total phosphorus values were recorded which slightly triggers the increase in biomass. Besides, higher WD and dWD values have also caused biomass increase due to the reinforcement of nutrients to the water column from the sediment in this period. It is thought that the increase in the species richness and diversity values in Period B is related to the unstable environmental conditions as well as their relationship with water temperature, total phosphorus, orthophosphate, specific conductance, soluble silica, and pH. During the studied periods, 16 phytoplankton functional groups (FGs) were prominent in the total biomass; however, FGs F, N, X1, X2, Lo, and T were abundant during Period A, while Y, E, W1, and H1 were important components of phytoplankton during Period B. Light availability was low in both periods; therefore, FGs that prefer or are tolerant to low light conditions were dominant in the lakes. However, elevated light availability in some months of Period B has selected coda W1 and H1. Higher nutrient levels in Period B have also determined the distribution of the FGs, and FGs that prefer or are tolerant to high nutrient conditions were prominent in this period.

对三个浅水湖泊中的浮游植物生物量、多样性、功能组（FGs）和环境参数进行了评估，以显示降水、湖泊表面积和风速的年际波动，这可能会影响浮游植物群落结构和分布。考虑到两个时期（时期 A 和时期 B），对萨卡里亚省（土耳其）的三个湖泊（Taşkısığı、Little Akgöl 和 Poyrazlar）进行了采样。B期获得的月(PRE)-日(dPRE)总降水量、湖面面积和月(WD)-日(dWD)平均风速值较高。此外，在B 期，可能是由于径流增加，记录了高总磷值，这略微触发了生物量的增加。此外，较高的 WD 和 dWD 值也导致生物量增加，这是由于这一时期沉积物对水柱的养分增强。认为B期物种丰富度和多样性值的增加与不稳定的环境条件以及它们与水温、总磷、正磷酸盐、比电导、可溶性二氧化硅和pH值的关系有关。在研究期间，16 个浮游植物功能组（FGs）在总生物量中占主导地位；然而，FGs F、N、X1、X2、Lo和T在A 时期丰富，而Y、E、W1和H1是B期浮游植物的重要组成部分。两个时期的光照可用性都很低；因此，喜欢或耐受低光条件的FG在湖泊中占主导地位。然而，在B 期的某些月份中，光照可用性的提高选择了尾声W1和H1。B期较高的营养水平也决定了FG的分布，偏好或耐受高营养条件的FG在这一时期较为突出。