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If you do the forestry right you create many plots in there and aim to cut down e.g. 2% in a given year. That mean you will get the whole forest replaced in 50 years. If you're careful to not cut too much in a single space then the animals and plants can move around and it should be ok for biodiversity.

Now for the energetic biomass - this is more like 5-10 year rotation so while the animals can move around the plants can't. Those will be mono-cultures to sustain energy demand until we have enough of some other energy sources.