7 Dissolved copper levels, copper complexing capacities and conditional stability constants have been 8 determined in the Tagus estuarine waters and one of the saltmarshes located in this estuary, the 9 Rosario saltmarsh. Tagus estuarine waters show a constant and around 20 nM copper concentration 10 during the estuarine mixing. Most of this copper is organically complexed by a strong ligand (L...

[1] Magnitudes of terrestrial (fresh) and marine (saline) sources of submarine groundwater discharge (SGD) are estimated for a transect across Indian River Lagoon, Florida. Two independent techniques (seepage meters and pore water Cl concentrations) show terrestrial SGD decreases linearly to around 22 m offshore, and these techniques, together with a model based on the width of the outflow face...

After decades of strict pollution control and municipal sewage treatment, the water quality of the Tanshui River increased significantly after pollution mitigation as indicated by the River Pollution Index (RPI). The pollution level of the estuarine region decreased from severe pollution to mostly moderately impaired. The most polluted waters are presently restricted to a flow track length betw...

We have previously shown that primary productivity in San Francisco Bay, USA, is highly correlated with phytoplankton biomass B (chlorophyll a concentration) and an index of light availability in the photic zone, Z,I, (photic depth times surface irradiance). To test the generality of this relation, we compiled data from San Francisco Bay and 5 other USA estuarine systems (Neuse and South Rivers...

The carbon dioxide flux through the air-water interface of coastal estuarine systems must be quantified to understand the regional balance of carbon and its transport through adjacent coastal regions. We estimated and calculated the emissions of carbon dioxide (FCO₂) and the partial pressure of CO₂ (pCO₂) values in 28 estuarine environments at a variety of spatial scales in the northern and nor...

Dynamics of heavy metals such as Fe, Mn, Co, Ni, Cu, Zn, Cr, Pb and Cd in surface water of Brahmani river-estuarine system were studied taking 25 samples from different sampling locations along the complete stretch. Irrespective of season, Fe was most abundant in both river (avg. 260.15 μg / l ) and estuarine (avg. 119.9μg / l) samples, whereas Cd (avg. 1.59 μg / l) and Co (avg.1.55μg / l) were...

Contents INTROD UCTI ON 1 Backgro und 1 Analy tical and historical notes 1 2 LOCATION 3 Proposed delineation ofocean and estuarine areas 3 Proposed level of p rotection in estuarine and non-estuarine waters 4 The effects ofintakes within and outside the littoral zone 5 3 FLO\V AN D VO LUM E 7 Effects of volume p ump ed on fi sh impi ngement and entrainment 7 The choice of2 to 30 million gallons...

Ammonia oxidation-the microbial oxidation of ammonia to nitrite and the first step in nitrification-plays a central role in nitrogen cycling in coastal and estuarine systems. Nevertheless, questions remain regarding the connection between this biogeochemical process and the diversity and abundance of the mediating microbial community. In this study, we measured nutrient fluxes and rates of sedi...

The newly described heterotrophic estuarine dinoflagellate Pfiesteria piscicida has been linked with fish kills in field and laboratory settings, and with a novel clinical syndrome of impaired cognition and memory disturbance among humans after presumptive toxin exposure. As a result, there is a pressing need to better characterize the organism and these associations. Advances in Pfiesteria res...

Natural patterns of zooplankton variability (temporal and spatial) in the Kromme Estuary have broken down due to persistent euhalinity (salinity values above 28‰) throughout the estuary. These conditions occur as a consequence of freshwater retention by a large reservoir. Only 2 x 10 m (<2% of the mean annual runoff (MAR) from the catchment) is allocated to the estuary per annum, and the presen...