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No. Many are under that impression, but it is not the case. Some fungi form mutualistic relationships with plants, where the plant gives the fungus sugars and the fungus gives the plant water and nutrients that would be difficult or impossible for it to get. These types of fungi are called mycorrhizal fungi. Then there are endophytes, which are similar to mycorrhizae except that they are not limited to the roots, and their mycelium (the main part of the fungus, if you are talking about the so called "higher fungi" that produce mushrooms. That's my area of expertise, so I'm sorry if you mean all fungi! :( ) weave between the plant's cells throughout the plant. Then there are fungal parasites. These start by living off a tree, then eventually use different methods to kill their host (which is in the case if higher fungi usually a tree) such as deadly toxins, or damaging the trees' vital systems and then proceed to decompose it, so parasites are a bit of a mix. Some parasitic fungi live solely off the tree for a long time before killing it, so that would be predatory, not decompositional. Then, of course, there are the saprophytes, which are decomposers. I hope I answered your question, but I realize I might not have because you might have meant all fungi! :) Have a good day.

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13y ago

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