The streams collect sediment and other fine and particulate material from their watersheds and transport them downstream as fluvial material. Macro-benthos is the most important secondary producers in stream ecosystem ...

Dunaliella salina is a unicellular halophilic green alga dominantly found in salt lakes, and high saline ponds in slatterns all over the world. A rigid cell wall is absent in D. salina while the cells are covered by ...