"daunting effects" is correct and usable in written English.
You can use it when you want to refer to something with serious and intimidating ramifications. For example, "The daunting effects of climate change are already being felt around the world."
Did Mr. Sentance really believe, given poverty's daunting effects, that 100percentt of children could pass state exams?
Poor family planning and unsafe abortion practices have daunting effects on maternal health.
Although a large proportion of cases will not progress to a life-threatening state, a diagnosis of PCa can have significant daunting effects on the patient and his family, with concomitant lifestyle changes, particularly due to the high risk of voiding and sexual dysfunction resulting from currently available curative treatment options.
Even if "Khan's rapid success came as a particular shock because it so quickly transformed this runt called Pakistan into something like a runt with a gun," it still had a disproportionately daunting effect.
Metaphysics and megalomania are mixed on a daunting scale, and the effect is overwhelming.
The challenges of implementing small satellites within limited resources can be daunting when faced with radiation effects on delicate electronics that require shielding or unique adaptations for protection, or mass, power and volume limitations due to constraints placed by the carrier spacecraft, or even Planetary Protection compliant design techniques that drive assembly and testing.
It may be a temporary condition — restraint in the face of daunting economic headwinds — but the effect is immediate: very little cake will be served at the Paris Motor Show this year.
But even for Smithingham, a visual effects expert, this project was daunting.
Heat traveling down microscopic girders and beams should behave in a similar way, but until now, daunting technical challenges prevented researchers from seeing quantum effects.
Even if we could measure flow over temporal and spatial scales relevant to developing egg masses, modeling its effects on oxygen levels would be daunting.
Although the composition of these formulations may appear daunting at first, a consideration of the physiological effects of the individual components can help to demystify these complex therapies.
