Estuarine nitrifiers: New players, patterns and processes

Estuarine Nitrifiers: New Players, Patterns and Processes

Role of estuarine natural processes in removal of trace metals under emergency situations

Estuaries are well known for their potential in removing metal from fresh water to provide micro-nutrients to aquatic life. In the present investigation, we have tried to bring out the metal removal potential of estuaries during accidental spills. For this purpose artificial river water containing high concentration of Mn, Cu, Zn, Ni and Pb were mixed with sea water at different salinity regime...

New methods for quantifying macroevolutionary patterns and processes

—This paper documents a series of methodological innovations that are relevant to macroevolutionary studies. The new methods are applied to updated faunal and body mass data sets for North American fossil mammals, documenting several key trends across the late Cretaceous and Cenozoic. The methods are (1) A maximum likelihood formulation of appearance event ordination. The reformulated criterion...

Estrogens Receptors-New Players in Spermatogenesis

The mammalian testis is a complex organ that serves two important functions, synthesis of steroids, with significant amount of estrogenic hormones produced and production of spermatozoa. Estrogen receptors (ERs) are expressed in cells of the testis as well as the epididymal epithelium. We have demonstrated that estrogen receptor expression is higher in reproductive tissues as compared to non-re...

Ecosystem Patterns and Processes

Ecosystems are complex entities composed of diverse organisms expressing a myriad of life histories, body sizes, and metabolic pathways embedded in a dynamic physical and chemical environment. A suite of internal processes create an intricate web of relationships that control the flow of energy and materials within and between ecosystems. Contributing to the complex nature of ecosystems is the ...