First, let's clarify what biotic factors are - these are all the living things in an ecosystem, like species, populations, and communities. It's like they're all attending a big party with different relationships and interactions. Let's get to know the six types of interactions!

Think of predation like a high-stakes game of tag - one animal (the predator) chases and eats another (the prey). When the predator's it, the prey population drops. If prey becomes scarce, predator numbers might decrease too. It's a constant balancing act, much like a seesaw, thanks to a process known as negative feedback mechanisms.

Real-world example: Take lions and zebras on the African plains. Lions (predators) hunt zebras (prey). If lions overhunt, zebra numbers will decrease, meaning less food for lions and a subsequent decrease in lion population.

The herbivory interaction is like a vegan party-goer nibbling on the veggie platter. Herbivores, like caterpillars, munch on plants. The number of these plant-eating guests depends on the abundance of plant food available - more food equals higher 'carrying capacity'.

Real-world example: In a forest full of delicious leaves, there's plenty of food for caterpillars (herbivores), so we'll see more of them!

Picture parasitism as an unwelcome party-crasher enjoying the feast while giving nothing in return. The parasite benefits, but the host pays the price. This relationship can reduce the carrying capacity of the host, as the host is being harmed.

Real-world example: Consider Rafflesia plants that grow giant flowers but no leaves. Unable to make their own food, they tap into a vine (the host), stealing nutrients and impacting the vine's health.