When do invasive species -meditated changes become environmental damage or benefit?what is the difference between negative impacts and significant negative impacts?

Is the cane toad a direct or indirect threat?

How are invasive species introduced into a new environment or ecosystem? Provide some examples of invasive species.

What is an indicator species and what does this have to do with parasites?

8)Which of the following questions would be considered ecological questions? choose all that apply a)How does the availability of rainfall affect pollen production in mulberry trees? b)How do the population dynamics of hawks affect the population dynamics of lizards? c)How does elevation affect the amount of rainfall? d)How did the mouse species present in the Mojave Desert arise? e)How does a mutation in a gene for amylase affect nutrient absorption in white-tailed deer? f)None of these are ecological questions