Wetlands are dynamic systems that undergo a variety of chemical reactions depending greatly on the specific physicochemical properties of the area, such as temperature, pressure, dissolved organic matter, pH, salinity, and dissolved gases (CO and O). The qualities that have the largest effect are salinity and pH. An increase in flooding (a result of dredging) increases the salinity of wetlands, as it allows saltwater to intrude, neutralizes the pH, and provides more anaerobic soil conditions. The conditions then effect the nutrient availability and redox reactions.