The phrase "a concurrent decrease in" is correct and usable in written English.
It can be used when discussing two or more events or trends that are happening at the same time and are decreasing in quantity or intensity.
Example: "The study found a concurrent decrease in both air pollution levels and respiratory illnesses in the city."
Alternatives: "a simultaneous decline in" or "a parallel reduction in".
Feed intakes increased as the proportion of concentrate in the diet increased, despite a concurrent decrease in silage intake.
An irreversible shear modulus increase and a concurrent decrease in sound attenuation were observed in the temperature region from ∼350 to 450 K on the first heating of specimens.
Protein folding is often depicted as a motion along descending paths on a free energy landscape that results in a concurrent decrease in the conformational entropy of the polypeptide chain.
WOF was found to involve the development of lipid oxidation derived nuance off-flavour and odour notes, e.g. rancid-like flavour and linseed oil-like odour, in association with a concurrent decrease in cooked pork meat-like flavour.
WOF was found to involve the development of lipid oxidation derived nuance off-flavour and odour notes, e.g. rancid-like flavour and linseed oil-like odour, in association with a concurrent decrease in 'meatiness' as described by, e.g. cooked pork meat-like flavour.
Plasma hemoglobin levels increased markedly on separation from cardiopulmonary bypass with a concurrent decrease in haptoglobin.
In vitro, Ngn1 expression in mES cells leads to rapid and specific neural differentiation, and a concurrent decrease in proliferation.
RightScale also found an increase in the number of enterprises planning for multiple public clouds (up from 16%to20%0%) and a concurrent decrease in those planning for multiple private clouds (down from 11% to 7%).
One recent study showed that Bacteroidetes was significantly increased with a concurrent decrease in Proteobacteria in the salivary microbiota of IBD patients.
Both counties saw an increase in woody vegetation, particularly in the shrubland category, and a concurrent decrease in herbaceous land cover.
If our initial hypothesis is correct, we expect to see an increase in overall patchiness (more, yet smaller patches) and decrease in spatial connectedness (contiguity) of herbaceous vegetation and a concurrent decrease in patchiness and increase in spatial connectedness of the woody vegetation classes, particularly on State Trust Lands.
