This study aims to determine the effect of giving different types phytoplankton on survival, abundance bacteria, and water quality white shrimp (Litopenaeus vannamei). research was carried out from October November 2020 at Laboratory Brackish Water Cultivation Center (BBAP) Ujung Batee, Aceh Besar. The larvae tested used were Nauplius stages 5-6. method a Completely Randomized Factorial Design ...

Abstract Marine microalgae are a promising sustainable source of lipids, omega-3 fatty acids, and carbohydrates. Selected species belonging to the Bacillariophyceae, Haptophyceae, Eustigmatophyceae, Prasinophyceae were characterised for cellular content carbon nitrogen, production yields total carbohydrates, ?-glucans. Carbon nitrogen showed hyperbolic decrease with increasing cell numbers Chae...

Nutrients are influenced by anthropogenic activities and consequently change the diversity density of phytoplankton. The spatial distribution dissolved inorganic nutrients phytoplankton were determined in river estuary, Kota Kinabalu, Sabah, Malaysia. Samples water collected from six locations estuary during month May 2019 to October 2019. highest abundances 86% diatoms study period. This was f...

Because of their large population sizes and rapid cell division rates, marine microbes have, or can generate, ample variation to fuel evolution over a few weeks or months, and subsequently have the potential to evolve in response to global change. Here we measure evolution in the marine diatom Skeletonema marinoi evolved in a natural plankton community in CO2-enriched mesocosms deployed in situ...

Nitrate uptake kinetics of different phytoplankton communities exhibit great variability over a 1-year period. Classical saturation kinetics accompanied by an induction phase are shown by blooms of Chaetoceros sp. in low nitrate waters. Biphasic kinetics, with transition points between 10 and 50 ìM, are shown by blooms of Skeletonema costatum and flagellates, while unsaturated kinetics (up to 1...

In a monsoon-affected tropical estuary, oscillations in freshwater discharge during monsoon shifted the phytoplankton blooms from those adapted to low salinities to high salinities and vice versa. Salinity stratification during monsoon (onset and restart after an intermittent break) favored diatom (Skeletonema) bloom in low-saline surface waters. In high-saline, nutrient-rich bottom waters, Fra...

In the context of global warming, changes in phytoplankton-associated bacterial communities have potential to change biogeochemical cycling and food webs marine ecosystems. Skeletonema is a cosmopolitan diatom genus coastal waters worldwide. Here, we grew strain with its native assemblage at different temperatures examined cell concentrations sp. free-living bacteria, dissolved organic carbon (...

Using chlorophyll/P700 ratios, the size and number of photosynthetic units were estimated, as a function of light-shade adaptation in two species of marine phytoplankton: Skeletonema costatum, a diatom, and Dunaliella tertiolecta, a chlorophyte. In the diatom, light-shade adaptation is characterized primarily by changes in the size and not the number of P700 units, whereas in the chlorophyte, o...