A small bowl of yogurt with blueberries and granola on top. Probiotics are not necessary for human health, according to Mayo Clinic nutritionist Katherine Zeratsky. Nevertheless, they might possess many health benefits. Although research is limited, some studies suggest that probiotics may help prevent or treat a number of conditions and improve overall health and wellness. Probiotics are found in food sources as well as dietary supplements.
In mutualism, both organisms benefit. In commensalism, one benefits and the other is unaffected; in parasitism, one benefits and the other is harmed. Some of these relationships are so close that we speak of the composite of two species as one unit; for example, we speak of the composite of algae and fungi as lichens.n commensalism, one benefits and the other is unaffected; in parasitism, one benefits and the other is harmed. Some of these relationships are so close that we speak of the composite of two species as one unit; for example, we speak of the composite of algae and fungi as lichens.
The final species interaction we will discuss is symbiosis, or the interaction where two species live in the same location, and one or both receive a benefit from the other. Under this definition, predation could also be considered a type of symbiosis.n fact, as you will see below, one of the types of symbiosisâ parasitism âis actually just a special form of predation. Despite this, ecologists generally classify predation and symbiosis as two different kinds of interactions. Donât ask us why.