The phrase "a discernible effect" is correct and usable in written English.
It can be used when discussing an observable or noticeable impact of a particular action, event, or phenomenon.
Example: "The new policy had a discernible effect on employee productivity, leading to improved performance across the board."
Alternatives: "a noticeable impact" or "an observable influence".
But the plundering of natural resources was having a discernible effect on the land.
Nor did the federally financed Healthy Marriage Initiative have a discernible effect.
Thanks to Peabody's prominence, her example had a discernible effect in beating back ignorance and fear in New York.
QE2, in which the Fed bought long-term government bonds, did not have a discernible effect on long-term government interest rates.
Yes it is, but you'd need to use vast quantities of it to have a discernible effect on the natural pH of the ground.
"She would have said that it would not have a discernible effect on anybody's behavior, that it would alienate people," Ken Moy, a friend at Spellman and at Princeton, recalled.
In a double-blind study, cocoa butter was not shown to have any discernible effect on stretch marks In a double-blind study, cocoa butter was not shown to have any discernible effect on stretch marks.
They had urged supporters to tick "No Vote" on the ballot, but amid an impressive 75% turnout of eligible voters, this had a barely discernible effect.
At this point, instead, new economic news will often have a more discernible effect on the forecast than new polls, since they affect the numbers in every state.
Environmental conditions and benthic grazing in the deep water channel had a less discernible effect on system-wide phytoplankton blooms although persistent water column stratification did increase bloom magnitude.
But that did not change Russia's stance in Ukraine, either, or have a real and discernible effect on Putin's popularity at home, as Russians, not generally big believers in coincidence, are ready to listen to calls to band together against outside conspiracies.
