7. A keystone predator most often increases community diversity by: (A) Preventing competitive dominance by a few species. (B) Eliminating all herbivores from the system. (C) Increasing net primary production directly. (D) Converting producers into consumers.

2.Which of the following statements about the River Continuum Concept is incorrect? (A) From upstream to downstream, FPOM is gradually replaced by increasingly abundant CPOM. (B) Many fishes in headwater streams require well-oxygenated water. (C) Microbes are significant consumers throughout much of the river continuum. (D) Benthic invertebrates can be classified into functional feeding groups (e.g., collectors, grazers/scrapers, shredders) based on how they acquire organic matter.

7. A keystone predator most often increases community diversity by:
(A) Preventing competitive dominance by a few species.
(B) Eliminating all herbivores from the system.
(C) Increasing net primary production directly.
(D) Converting producers into consumers.

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