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The present study conducted at the mangrove ecosystem of Kali estuary. Samples were collected from the three fixed stations for the period of thirteen months from January 2008 to January 2009 at regular monthly interval to identify and quantify the abundance, taxonomy and relative ratio of phytoplankton and zooplankton. In the present study of species diversity of zooplankton groups in the mangrove area, composed of twelve groups comprising fifty two species major share comes from the copepods which comprises about seventeen species. Protozoa taxa comprised by five species, coelenterata and cladocera by two species each, ctenophore comprised by single species whereas the larval forms comprised by fourteen species.

Present work was pertaining to studies conducted at one lentic perinial water body at Talaguppa viz., Gourikere pond Tq:Sagar Karnataka.  The period of study undertaken it one year from May - 2007 to April - 2008. This study is intended to monitor the water quality of Gourikere pond of Talaguppa, Sagar Tq: Shimoga District and also helpful for using this water for making fisheries activity. The present investigation encompassed collection of data pertaining to various aspects such as meteorological condition, physicochemical parameter of water body of Gourikere pond. Air and surface water temperatures varied from 29.7oC to 37.5oC and from 20.6oC – 24.8oC. And the pH ranged between 8.1 to 9.1. Variation in dissolved oxygen content was from 6.4 mg/l to 10.8 mg/l  and variation in CO2 was observed from 7.4 mg/l to 12.00 mg/l.  Concentrations of nutrients viz. nitrates (0.69 mg/l to1.30 mg/l), phosphates (0.30 mg/l to 0.63 mg/l) Magnesium (11.79 mg/l to 88.64 mg/l) sulphate (2.45 mg/l to 5.16 mg/l) Calcium (33.41 to 138.10mg/l), also varied independently. The results of the study revealed that hydrographical conditions fluctuated moderately throughout the year. Keywords: Physico-chemical parameters, lentic, Nutrients, Gourikere pond.

Estuarine mangroves give natural support to the protection of the riverbanks, due to their accumulative nature. To study this effect, it is necessary to measure sedimentation rates under estuarine mangroves. Sediment plays an important role in the storage and release of nutrient into the water column, the mineralization of organic carbon deposits by various kinds of microbes. In association with other parameters, the sediment is responsible for the variations in densities of majority of benthic organisms. Regular monthly collections of bottom water and sediment were made for a period thirteen months from January 2008 and January 2009 at five different study sites using the motorized outrigger canoe. The present investigation encompassed collection of data pertaining to various aspects of sedimentology. Sediment temperature varied from 25.100c to 30.450c. The pH ranged between 6.18 to 8.30. Organic carbon Varied between 2.06 to 29.45%, moisture content varied from 20.10% to 41.88.Values of interstitial water content is varied between 1.60% to 30.95%. Wide variation in the percentage composition of sand (28.45% to 80.10%), silt (12.78% to 54.28%), and clay (3.66% to 33.63%) was observed.Keywords: Sedimetology , Ecosystem, Mangrove, Kali river, Karwar.