The phrase "are linked to variation" is correct and usable in written English.
It can be used when discussing relationships or connections between different factors or elements that exhibit variation.
Example: "The results of the study indicate that several environmental factors are linked to variation in species populations."
Alternatives: "are associated with variation" or "are connected to variation".
Collectively the results reinforce the view that individual differences in hand preference and performance are linked to variation in the motor-hand area, not just in humans but also in chimpanzees.
Further discussion of CNVs is important, as they are linked to variation among rice varieties, and are likely to contribute to subspecific characteristics.
Whereas many quantitative traits are linked to variation in gene expression, the initial sequencing of the pig genome revealed that individual pigs also harbour significant numbers of potentially deleterious protein-coding mutations [ 12].
Variations in electrical resistivity are linked to variations in moisture content and temperature.
Critically, the significant correlation with task performance involving the rSTG clearly indicated that GM decreases in the rSTG are linked to variations in unicycling performance.
The increases and decreases are linked to variations in both fishing mortality and reproductive success, which itself is related to climatic-hydrographic variations and abundance of predators of cod eggs and larvae.
By this he meant that a substantial fraction of the variation among individuals within a culture can be linked to variation in their genes.
The rock often shows variations of up to a metre which has been linked to variation in the climate at the time of deposition.
A large body of research has demonstrated that variation in competitive behavior across species and individuals is linked to variation in physiology.
Geographic (Gibbons et al. 2005; Grunebaum et al. 2004) and temporal (Olfson et al. 2003) variation in suicide rates has also been linked to variation in antidepressant prescription patterns.
