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Types Of Plant Material The Ruminant Ingests

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Ruminants are a group of mammalian herbivores – including cows, goats, and deer – that ferment their nutrients in a specialized stomach prior to digestion. This organ is called a rumen, and is host to millions of bacteria, protists, and fungi. A calf is born with a sterile rumen and microbial populations are introduced in the days following birth through exposure to the environment, consuming forage, and interactions with its mother. A typical rumen population is established around 2 weeks after the calf begins to intake dry matter and forage. Each of these organisms found in the rumen play a role in breaking down the various types of plant material the ruminant ingests. The rumen maintains a neutral pH so the microbes it contains can thrive and effectively break down anything the animal eats. These microbial populations exhibit a type of community succession based on seasonality and availability of different food sources; various microbes thrive when certain types of foods are being consumed and that same type of food can cause other microbe populations to die off. Deer for example, rely on woody food in the winter, greenery in the spring, and acorns in the fall. The rumen adjusts the bacterial populations to those suited to best digest whatever type of material is being consumed. Many of microbes in the rumen are digested and passed on to the next part of the digestive tract with the cow’s food. The microbes maintain their populations in the rumen by having a

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