A general survey of the fertility of 25 estuaries, based on their concentrations of nutrients, phytoplankton and zooplankton assemblage and fish production in each, as far as these are known, has been enumerated. In all 25 estuaries, of both the coasts 8 from the east coast which end up in the Bay of Bengal and the rest which the Arabian Sea have been covered.
The Apodi estuarine located in the north coast of Rio Grande do Norte State; it is a typical and key valley region with apparent upland ecosystem vulnerability and sensitivity.
MUMBAI: The survey of coastal waters suggests that the influx of industrial waste into inner estuarine zones-tidal areas where the sea meets rivers-should be discouraged for new industries. Stringent measures are also suggested for the treatment of effluents that are presently released into the sea without any controls.
The temporal and spatial distribution of salinity, DO, BOD, turbidity, pH, hardness and dissolved nutrients of surface water collected from different points of Dhamra estuary were measured during February-2007 to January-2008. The pH of water was alkaline throughout the year. The salinity, conductance, hardness increased towards the river mouth as compared to inland stations.
Bacterial isolates from water and sediment samples from freshwater, estuarine and marine regions were tested for their growth in the presence of different concentrations of arsenic.
Water characteristics of Kandla creek, monitored seasonally from 2002 to 2006 at four locations (mouth, cargo jetty, oil jetty and junction), indicated significant increases in nutrients, petroleum hydrocarbons (PHc) and phenols from anthropogenic additions, while increases in turbidity, total suspended solids (TSS) and salinity from natural effects.
Manakkudy estuary, located on the South-West coast of India has production of seaweeds to an amount of 15.59 kg/m2/yr. Four different types of seaweeds viz., Chaetomorpha aerea, Enteromorpha compressa, Gracilaria verrucosa and Hypnea musciformis were observed in this estuary. Highest production of biomass (C. aerea = 842.33
This study documents the deteriorating riverine environment of Sindh. Previous studies have also highlighted this issue but the referencing and documentation is generally fragmentary.
