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Planktonic bacteria, often referred to as "plea bacteria" in a colloquial or humorous context, are free-floating microorganisms that drift in water environments, such as oceans, lakes, and rivers. Unlike sessile bacteria that attach to surfaces, these planktonic bacteria remain mobile, allowing them to disperse widely and interact with various nutrients and other microorganisms. They play crucial roles in aquatic ecosystems by participating in nutrient cycling, decomposing organic matter, and serving as a food source for larger organisms. Some planktonic bacteria are also beneficial, contributing to processes like nitrogen fixation and producing essential compounds, while others can be pathogenic, causing diseases in humans and animals.
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