Assuming that the concept of a river continuum is correct, how would a second-, third-, and fourth-order river be ranked, in terms of the importance of terrestrial vegetation as a food source for the organisms within it?
A) Fourth order third order second order
B) Third order second order fourth order
C) Second order fourth order third order
D) Second order third order fourth order

Question

Assuming that the concept of a river continuum is correct, how would a second-, third-, and fourth-order river be ranked, in terms of the importance of terrestrial vegetation as a food source for the organisms within it?
A) Fourth order > third order > second order
B) Third order > second order > fourth order
C) Second order > fourth order > third order
D) Second order > third order > fourth order

Quizplus · Accepted Answer

In the river continuum concept, smaller streams (like second-order) rely more on terrestrial vegetation as a food source, while larger rivers (like fourth-order) rely more on aquatic sources.

Assuming That the Concept of a River Continuum Is Correct