Babies born at less than 37 weeks gestation (premature) have different nutritional needs than babies born at full term (after 38 weeks). Premature babies will often stay in the neonatal intensive care unit. There they are watched closely to make sure they are getting the right balance of fluids and nutrition.
Indeed, hypotension may result in low flow or so-called watershed infarctions, and more significantly, it may augment injury from other causes. Due to the limitation of retrospective design, the study did not review the link between postoperative hypotension and the occurrence of stroke.
However, a watershed is more than just a piece of land that collects the rainwater and dumps it into the river. Anything that ends up in a watershed ends up in a body of water, including pollutants like discarded motor oil or paint, or sediments from trees cut down due to construction. These and other pollutants can contaminate a water supply, erode the land surrounding the body of water and disrupt aquatic habitats.