"decrease the availability" is a correct and usable phrase in written English.
You can use it when you want to describe a situation in which something is becoming less available or accessible. For example, "The increasing demand for cars is sure to decrease the availability of cars in the market in the upcoming months."
These changes may decrease the availability of affordable family planning services in Michigan.
The planned construction of Russia-China oil and gas pipelines from Eastern Siberia may decrease the availability of resources for the West and shift the economic center of gravity in Eurasia further East.
Assimilation of seabird-derived nitrogen by coral could then be particularly significant in terms of resilience to climate change, especially as some studies predict that increasing sea surface temperatures will decrease the availability of nitrates61.
With a focus on violence prevention and public safety, he designs and implements innovative programs concentrating on youth, improving the efficiency of law enforcement agencies and policies to decrease the availability of firearms.
"To reduce alcohol-related harm we need to decrease the availability of alcohol through restricting outlet density and trading hours, place stronger restrictions on alcohol marketing and a volumetric tax on alcohol," she said.
Theoretically, antisense oligodeoxynucleotides (ODNs) decrease the availability of signals by blocking the transcription process, thereby offering an opportunity to dissect the relative roles of neurotransmitters that elicit similar biological responses.
This less permissive medium decreases the availability of alternative pathways.
However, its use decreased the availability of P in the soil.
The increased uptake in carbon dioxide has also decreased the availability of aragonite — an essential mineral for many marine species' shells.
Consequently, CD81 depletion results in SAMHD1 increased expression, decreasing the availability of deoxynucleoside triphosphates (dNTP) and thus HIV-1 reverse transcription.
In addition, an increase in the nitrate concentration of fertilised ryegrass could have played an important role in the reduction of methanogenesis by decreasing the availability of hydrogen.
