Abstract Coral bleaching caused by ocean warming is leading to worldwide coral decline. The physiological processes underlying this ecological event are still incompletely understood, although previous research has suggested oxidative stress as major player in the impairment of symbiont thylakoid membranes and symbiosis breakdown. Lipids interesting targets investigation, given their susceptibility thermal stresses. Here, an untargeted lipidomic approach was employed examine changes lipidome...

The contribution of the polluted São Vicente and Santos estuarine channels to eutrophication bay was assessed through quantification instantaneous transport salt, dissolved inorganic nitrogen (DIN) phosphate, organic matter (OSM ISM) chlorophyll-a (Chl-a), during dry (austral winter- August/ 1999) rainy summer- January/2000) seasons. Samplings were carried out spring neap tides, in flood ebb phases, two transversal sections at mouths channels. Instantaneous values generally indicated...

Samplings were undertaken on the basis of a grid 40 oceanographic stations distributed along eight sections with same point origin: in middle portion mouth Santos Bay (Fig. 1). Surface water samples collected using Niskin bottle. The filtered through AP-40 Millipore filters for chlorophyll-

Abstract Background Energy demand by mankind has become one of the most important aspects our society. A promising technology that seeks to provide part energy and obtain high-value products is thermochemical conversion microalgae biomass. Inorganic species presented in biomass may act as catalysts for reactions are responsible notorious ash-related issues during decomposition. Results In this study, freeze-dried Scenedesmus sp. was used evaluate lipid extraction methodology regarding a...

Plankton community and hydrological conditions were assessed as a part of ao environmental diagnosis in São Sebastião Channel, before the building submarine outfall produced water from oil maritime terminal PETR08RÁS. Samples collected twenty oceanographic stations located neighboring area, during springtime 1991. Oissolved inorganic nutrients chlorophyll-a concentrations observed indicate an oligo-mesotrophic environment. Phenols sulfides absent, 800 values, except for three sampling...

The vertical mixing between South Atlantic Central Water (SACW) and Coastal (CW) was simulated through microcosm experiments using the autochthonous phytoplankton community (fraction < 150 mm), without nutrient enrichments. SACW is cold (T< 18°C) rich, while CW warmer (T> 20°C) oligotrophic. growth potential of SACW, an equivalent mixture both (SACW+CW) compared, under 100, 30 10% sunlight, at surface seawater temperature, in winter summer conditions. Results demonstrate importance...

This study assessed the effect of non-thermal plasma (NTP) on Nannochloropsis gaditana cell rupture and subsequent lipid extraction. Micrograph images showed that surface original N. cells appeared smooth had no apparent holes, whereas after NTP a non-uniform apparently fractured with many pores large splits. Maximum recovery from (~19%) for NTP-assisted was observed at 10 min, similar to extraction min sonication (19.0%). The both pretreatments (average 19.0%) 2-fold higher than control...

Primary production is essential in shaping biogeochemical cycles and microbial ecosystem dynamics. The distribution of chemosynthetic rates pelagic zones their participation the carbon cycle, especially when compared to photosynthetic Southwestern Atlantic Ocean, are poorly constrained. This study aimed measure photo- productivity analyze spatial abiotic drivers. Samples for photosynthesis experiments collected at surface deep chlorophyll maximum (DCM) were incubated with 14C-bicarbonate...

Optical characterizations of coastal water masses are important tools for a better understanding physical and biochemical processes aid the optimization ocean color algorithms. In this study we present three optical classes observed during October/2005 March/2006 on inner continental shelf adjacent to Santos Bay (Brazil), based remote sensing reflectance. ANOVA indicated crescent estuarine influence in 1 3. Class 3 presented highest chlorophyll-a nutrient concentration light absorption...

Iron is a limiting nutrient for Symbiodiniaceae (colloquially known as zooxanthellae), with low solubility in seawater. The use of stable, soluble, and chemically defined iron complexes proposed strategy to control the supply this metal target organisms. In work, we investigated effect iron(II) derivatives iron(III) (desferrioxamine, deferiprone, deferasirox, HBED) over growth loading five species. supplementation did not affect or load species high stocks. contrast, stocks, hydrophobic...

Barrera-Alba, J.J., Gianesella S.M.F., Saldanha-Correa F.M.P., and Moser G.A.O., 2007. Influence of an Artificial Channel in a Well-Preserved Sub-Tropical Estuary. Journal Coastal Research, SI 50 (Proceedings the 9th International Symposium), 1137 – 1141. Gold Coast, Australia, ISSN 0749.0208 The Estuarine-Lagoon System Cananéia-Iguape is located on southeast coast Brazil, with extension 10000 ha. It complex naturally eutrophicated ecosystem associated to broad relatively well-protected...

Abstract Reverse osmosis is currently the most promising method for addressing freshwater scarcity in numerous nations, enabling production of drinkable water human consumption. This process, however, generates a byproduct stream, known as desalination concentrate (DC), that enriched with high concentrations salts such Na + and Cl − , moderate levels SO 4 2− Mg 2+ Ca K trace Si, Fe 3+ NO 3 PO 3− which can be suitable valuable microalgal metabolism growth. Salt concentration DC significantly...

Abstract Dissolved nutrients and phytoplankton distribution in the Bertioga Channel, São Paulo State, were studied over a neap spring tide during austral winter of 1991. Tidal influence freshwater flow main forcing agents on water column structure, nutrient availability as pointed out by principal component analysis. The channel was vertically stratified tide, but almost fully homogeneous especially flood phase. inner area had high concentrations (up to 25 μM ammonium) low dissolved oxygen...

Short-term variability of nutrients, chlorophyll-a (Chl-a) and seston (TSS) concentrations were followed up at a fixed station in the Bertioga Channel (BC), Southeastern Brazil, over two full tidal cycles neap spring tides, during winter 1991. Simultaneous data on hydrographic structure, level currents allowed computation net transport those properties. Tidal advection freshwater flow main forcing agents water column nutrient availability Chl-a distribution. Dissolved inorganic nitrogen...

Chlorophyll-a (Chl-a) is a ubiquitous photosynthetic pigment in phytoplanktonic species, which include eukaryotic and prokaryotic organisms (cyanobacteria).Thus it has been used commonly as reliable proxy for total phytoplankton biomass (Gregor & Marsálek, 2004) since the early 1930s (Phinney Yentsch, 1985).Glass fiber filters have traditionally to concentrate cells extract pigments spectrophotometric measurements.However, after discovery of photoautotrophers smaller than 1 µm, such...

The aim of the current study was to evaluate productive capacity phytoplankton community and other environmental variables in estuarine area Suape; while considering constant morphological, sedimentological hydrological changes, site has been facing due implementation expansion an industrial port complex. comprised 6 campaigns: 3 dry season rainy season. Water samples were collected from surface layer internal external portions bay during low spring tides. salinity ranged 32.20 37.10, water...

<title>Abstract</title> Zinc is an essential metal to living organisms, including corals and their symbiotic microalgae (Symbiodiniaceae). Both Zn(II) deprivation overload are capable of leading dysfunctional metabolism, coral bleaching, even organism death. The present work investigated the effects chemically defined Zn species (free Zn, ZnO nanoparticles, complexes Zn-histidinate Zn-EDTA) over growth dinoflagellates <italic>Symbiodinium microadriaticum, Breviolum minutum</italic>,...