The Sea Grant programs of Connecticut and New York announced Wednesday that they will fund research into the changing conditions that cause hypoxia (low oxygen conditions) in Long Island Sound.

The research is supported by the bi-state Long Island Sound Study with funding from the Environmental Protection Agency. The three projects, totaling $843,424, involve teams of researchers in two states, Connecticut Sea Grant, located at the University of Connecticut’s Avery Point campus, said in a news release.

The researchers will examine nutrient cycling and the impacts of nitrogen pollution on water quality in Long Island Sound. This research will improve the ability to model future conditions and management actions. Projects began in March and should be completed in 2017.

The researchers are:

• Craig R. Tobias of UConn’s Department of Marine Sciences, who will examine biogeochemical processes involving nitrogen loss and recycling in Long Island Sound sediments and the connections to overlying waters.

• Robinson “Wally” Fulweiler of the Boston University Department of Earth and Environment, who will quantify changes in organic matter as it at falls through the water to the sediment in five locations.

• Mark A. Altabet, of the University of Massachusetts Dartmouth Department of Estuarine and Ocean Science, who will use isotope geochemical techniques to examine the impact of recent changes in nitrogen inputs and oxygen levels due to recent upgrades to wastewater treatment plants.