Crocosphaera watsonii WH 8501 is a marine unicellular cyanobacterium that fixes nitrogen primarily during the dark phase of a light-dark (LD) cycle. Circadian clocks modulate gene transcription and cellular activity in many, if not all, cyanobacteria. A model for circadian control has been proposed in cyanobacteria, called the oscilloid model, which is based on topological changes of nucleoid D...

Safe drinking water is ahealth necessity. This study was for comparing between certain physico-chemical and microbial parameters of two treatment plants (Shebin El-kom conventional plant Shobrabass compact plant) during a period from February 2019 to December 2019. The treated at these had remarkable enhancement as compared with raw one basically the values TDS, conductivity, total alkalinity, ...

The phytoplankton distribution and biochemical composition concerning water quality parameters were studied in the coastal waters off Mangalore, Monthly sampling was carried out from October 2020 to May 2022 at selected stations of Netravathi-Gurupura estuary, latitude 12°50'38.56" N, longitude 74°50'0.23° Padubidri 13° 8'0. 57" N 74°42'9.47° with an average depth 8 meters. Spatiotemporally phy...

The algal groups present in periphyton communities form an important base of autochthonous food webs freshwater streams. Nitrogen (N) and phosphorus (P) are key macronutrients aquatic systems. Excess nutrients benefit some over others. We paired a nutrient-diffusing substrata limitation experiment with high performance liquid chromatography to (a) identify which nutrient(s) limit production, (b...

The purpose of this study was to evaluate the effects limiting nutrients and N: P ratios on growth phytoplankton. In study, we used nutrient enrichment bioassays (NEB), Multivariate analysis variance, regression analysis. results showed that affected change phytoplankton assemblages concentrations nitrogen phosphorous. During same period, response time input external similar. rates were not per...

To understand the interactions among eutrophication, algal bloom, and POPs (persistent organic pollutants) in freshwater ecosystems, cumulative selectivity of PAHs (polycyclic aromatic hydrocarbons) phytoplankton, water, sediment with different eutrophication level waters were identified a typical plain river network region located Nanjing City. Results showed that total 33 species belonging to...

太湖流域地处长江下游，水系发达，是典型的平原水网地区，为明确空间和环境因子对太湖流域浮游植物功能类群分布的影响，本研究于2019年8—9月期间比较太湖流域包括河流、湖泊和水库的85个采样点的浮游植物、空间和环境特征. 首次利用“人工智能图像识别技术”，并结合传统人工镜检，共鉴定浮游植物250个分类单位，隶属于9门13纲28目57科110属，以绿藻门(45.6%)、硅藻门(19.2%)和蓝藻门(16.4%)为主. 共划分功能类群31个，包括M、D、J、S1、C、Y、F、P、MP、H1、SN、W1、G、K和TB共15个优势功能类群. 结果表明：1)太湖流域不同水体功能类群组成差异显著，差异主要来自M、J、S1、Y、P、H1类群；2)浮游植物功能类群分布具有一定的空间异质性，以太湖为中心向外形成3个聚类组，物种组成类型依次为蓝藻型、蓝藻-绿藻-硅藻型、绿藻-硅藻-蓝藻型，主要贡献类群依次为...