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The question that best relates to the ecologist's observations and the scientific data collected on river ecosystems is:
The previous question that the ecologist very possibly must ask is due to the overabundance of rainbow trout and the very low number of native species.
In order for rainbow trout to adapt and reproduce quickly, it has had to feed on macroinvertebrate species, affecting the native fauna of this ecosystem and causing the displacement of other native species and even death due to lack of food.
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https://brainly.com/question/9718639