From 1983 to 2011, dissolved oxygen (DO) conditions in the Tapi Estuary changed from normoxic to hypoxic due to increased and untreated discharge of sewage. Both tidal and day-night variations of DO were best explained by hydrographic factors, sewage pollution and phytoplankton dynamics in upper, middle, lower estuary and the coastal water. Hypoxia/anoxia was associated with low-flow periods du...

Major ions and nutrient chemistry of surface water from the Devi river estuary, eastern India has been studied in order to understand governing biogeochemical processes. Concentration Na, K, Ca, Mg, Cl, SO4 PO4 increases toward higher salinity; however, NO3 dissolved silica (DSi) decreases upper lower estuary. All major ions, except DSi, show highest lowest concentration summer monsoon season, ...

Habitats along migratory routes may provide key resources for migratory species (e.g. stopover habitat). For example, migratory juvenile salmon transit through estuaries on their way from freshwaters out to the ocean, but they may also reside and feed in these habitats. Here we examined the amount of time that juvenile salmon feed and reside in the estuary of the Skeena River (British Columbia,...

Speciation and reactivity of mercury were examined in Berry's Creek estuary downstream of a highly mercury-contaminated U.S. EPA Superfund site during the summers of 2002 and 2003. Surface water samples from Berry's Creek estuary, its confluence with the Hackensack River, and upstream of that confluence were analyzed for total (THg), particulate (PHgT), and dissolved (DHg) mercury, total and pa...

Monitoring sediment quality and total mercury concentrations over the period 1993-2001 at 26 stations in San Francisco Estuary has shown the seasonal cycling of mercury sediment concentrations, as well as a significant (P < 0.05) decrease in those concentrations at eight stations across the estuary. This decrease in sediment mercury concentrations is attributed to the transport of relatively cl...

.................................................................................................... 1 1.0 Introduction .............................................................................................. 2 2.0 Methods ..................................................................................................... 3 2.1 Cockburn Sound fishing trials .................................

About this Report This publication represents a new style of reporting for the San Francisco Estuary Regional Monitoring Program (RMP). The fundamental purpose of the RMP is to provide information to improve the management of the San Francisco Estuary and protect what we value about the Estuary (SFEI 1998a). The intent of The Pulse of the Estuary (hereafter referred to as The Pulse) is to help ...

In the present study, we analyzed variations in bacterial community structure along a salinity gradient tropical monsoonal estuary (Cochin [CE]), on southwest coast of India, using Illumina next-generation sequencing (NGS). Water samples were collected from eight different locations thrice year to assess variability and determine physico-chemical factors influencing diversity. Proteobacteria wa...