Grazing by microzooplankton on phytoplankton in Manukau Harbour was measured by size-fractionated dilution experiments at monthly intervals from October 1994 to October 1995. Grazing rates were always highest on the < 5 urn size fraction, the smallest size fraction measured. These rates ranged from 0.3 to 1.3 d" and were highest in November and March; values did not appear to vary with grazer a...

Phytoplankton and water quality of Marathonas drinking-water Reservoir were examined for the first time. During the study period (July-September 2007), phytoplankton composition was indicative of eutrophic conditions although phytoplankton biovolume was low (max. 2.7 mm³ l⁻¹). Phytoplankton was dominated by cyanobacteria and diatoms, whereas desmids and dinoflagellates contributed with lower bi...

[1] We present new empirical and mechanistic models for predicting the export of organic carbon out of the surface ocean by sinking particles. To calibrate these models, we have compiled a synthesis of field observations related to ecosystem size structure, primary production and particle export from around the globe. The empirical model captures 61% of the observed variance in the ratio of par...

Concurrent changes in ocean chemical and physical properties influence phytoplankton dynamics via alterations in carbonate chemistry, nutrient and trace metal inventories and upper ocean light environment. Using a fully coupled, global carbon-climate model (Climate System Model 1.4-carbon), we quantify anthropogenic climate change relative to the background natural interannual variability for t...

PETROVA, D., 2008. Major bloom producing phytoplankton species in the lakes along the Bulgarian Black Sea Coast. Bulg. J. Agric. Sci.; 14: 201-208 Archive data analysis shows that during the different periods of anthropogenic impact phytoplankton production reaches pathologically high levels. Thus, phytoplankton is assumed as an indicator of marine water quality and ecological health. Its long-...

Factors that control the distribution of marine phytoplankton are critical to our understanding of the primary productivity and global carbon cycling. In addition, the pigmentation of phytoplankton and the exudates of phytoplankton (colored dissolved organic matter) are two of the major factors influencing ocean optical properties. The cyanobacteria, including Prochlorocococcus marinus, are amo...

Seasonal variability of phytoplankton in two lentic habitats of the Chalakkudy river basin viz. Parambikulam and Peringalkuthu reservoirs were studied during 20092011. Qualitative and quantitative analysis of phytoplankton were analysed using standard methods. A total of 102 species of phytoplanktons were recorded from the lentic habitats of the study area during the study period. A higher abun...

Dilution experiments were performed to estimate phytoplankton growth and microzooplankton grazing rates during two Lagrangian surveys in inner and eastern locations of the Eastern North Atlantic Subtropical Gyre province (NAST-E). Our design included two phytoplankton size fractions (0.2-5 µm and >5 µm) and five depths, allowing us to characterize differences in growth and grazing rates between...

Cerebral language lateralization can be assessed in several ways. In healthy subjects, functional MRI (fMRI) during performance of a language task has evolved to be the most frequently applied method. Functional transcranial Doppler (fTCD) may provide a valid alternative, but has been used rarely. Both techniques have their own strengths and weaknesses and as a result may be applied in differen...

What is the relationship with environmental factors of phytoplankton community dynamics in saline lakes? We analyzed a data set of phytoplankton community and environmental parameters in seasonal periods (i.e., summer and autumn) in order to describe seasonal variations within the phytoplankton community and its relationship with environmental variables in Chagan Nur Lake on the Ordos Plateau i...