The phrase "and decrease in quantity" is correct and usable in written English.
It can be used when discussing a reduction in the amount or number of something, often in contexts related to statistics, economics, or resource management.
Example: "The recent changes in policy have led to an increase in demand, but we also anticipate a decrease in quantity available for distribution."
Alternatives: "and reduction in amount" or "and decline in number".
Precipitation is frequent and decreases in quantity southward, with snow common in the far south.
This erosion of genetic diversity was paralleled by the accumulation of mutations leading to a decrease in quantity and viability of pollen and seeds, as well as a reduction in the number of flowers per individual and an increase in phenotypically discernible mutants.
Due to the scarcity of MSCs, especially the apparent decrease in quantity and quality with age and diseases, as well as the fact that patient-derived MSCs have the same genetic defects as the patient, it is sometimes desirable to consider using allogeneic MSCs for therapy.
Lowest values are consistently encountered on the central abyssal plains of major ocean basins The shift of biomass dominance groups with depth is shown to be affected by the decrease in average body size rather than abundance, presumably due to decrease in quantity and quality of food supply.
The overall picture of antibody responses in old age seems to be one of changes in specificity and quality rather than a decrease in quantity (Howard et al., 2006).
The World Health Organization has recommended that advertising of unhealthy food to children decrease in quantity (exposure) and efficacy (power).
Paracetamol toxicity was evidenced by increase in MDA quantity and decrease in cell GSH levels and antioxidant defence system.
That could lead to a decrease in quantity — but perhaps an increase in quality.
Probably, this occurs due to a decrease in quantity of hydroxyl groups on a surface of Fe3O4/HA nanocomposite in comparison with a surface of initial magnetite.
A study published in Organizational Behavior and Human Decision Processes found that upper-level managers who used their phones after 9 p.m. experienced a decrease in quantity as well as quality of sleep.
