New Delhi, May 23 -- Dredging in a lake may transform its micro-ecology, according to a new report.

Researchers from the National Institute of Oceanography and Fisheries in Cairo studied Lake Manzala, a coastal lake of Egypt, for seven years during 2015-2022.

They found that dredging increased salinity and reduced nutrients in the lake considerably in 2022 compared to 2015. This, in turn, changed the chemical parameters and zooplanktons in the lake's northern and the middle regions.

The findings were published in Evaluating the restoration of Lake Manzala after dredging using water quality parameters and zooplankton changes in the journal Nature in May 2025.

Manzala is situated in the northern part of Egypt, with the Mediterranean Se...