The phrase "affect the variety" is correct and usable in written English.
It can be used when discussing how certain factors influence or change the diversity or range of something, such as products, species, or experiences.
Example: "The climate change can significantly affect the variety of plant species in the region."
Alternatives: "influence the diversity" or "impact the range".
The disinvestment will also affect the variety of topics offered to students.
Evidently, lifestyle, dietary habits, and the use of antimicrobial agents may affect the variety of bacterial species and the microbial load, modulating the composition of commensal microbiota.
Moreover, the functional complexity of β-chain repertoire is resolved by other mechanisms such as alternative cis- and trans-splicing and recombinational diversification that seems to affect the variety of the constant region.
As the increment of the number of TRBD and TRBJ genes produces larger variation in TR β chain, particularly in CDR3 region as expected, similarly, the presence of an additional TRBC gene seems to affect the variety of the β chain repertoire.
Geological processes significantly affect the varieties and characteristics of karst caves, and therefore engineering geological and hydrogeological conditions of Shangjiawan Tunnel were analyzed firstly.
Although, no single factor can account for the observed diversity, again salinity and temperature are the major factors affecting the variety of marine fungi.
This reflect the fact that environmental data are affected the wide variety of natural and anthropogenic influences.
The question of how expression of ISR affects the large variety of mutualistic and antagonistic plant-microbe and plant-insect interactions cannot yet be answered.
Oil and gas development in polar bear habitat can affect the bears in a variety of ways.
We identified small molecules that affect the development of a variety of structures such as heart, vasculature, brain, and body-axis.
These changes could affect the expression of a variety of downstream genes such as those involved in the cell cycle, apoptosis, adhesion, and angiogenesis [ 3].
