Explain how biotic and abiotic factors can positively and negatively impact an organism

modulate abiotic forces that, in turn, affect resource use by other organisms.  both negative and positive effects on species richness and abundances at small scales, but things that a tree does than directly use the tree for ... changes in biotic or abiotic materials. in comparison to some of the other examples we discuss.

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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