English to French Science Livestock / Animal Husbandry animal nutrition / nutrition animale

The document I'm translating is about gut health in broiler chickens.

"Consequently, the microbial populations in the ceca established based on relative ability to compete for nutrients could become imbalanced resulting in overgrowth of organisms that while normally present are not actively growing in a normal nutrient restricted environment."

It's urgent and I'm tired: my brain will only come up with:

"En conséquence, les populations microbiennes dans les caeca qui s’établissent sur la base de leur capacité relative de concurrencer / rivaliser pour des nutriments..."

OR "En conséquence, les populations microbiennes dans les caeca qui sont fondées sur la base de leur capacité relative..."

Thank you for your suggestions