Apentix/AP Environmental Science/Unit 1: The Living World: Ecosystems/Question

AP Environmental Sciencemediummcq1 pt

An invasive plant species enters a lake and doubles producer biomass. The most likely ecological consequence is

A.initial consumer boom, then oxygen depletion as biomass decomposes

B.permanently higher oxygen levels

C.no change at all

D.instant fish extinctions only

Explanation

Core Concept

Extra biomass feeds more consumers briefly, but the eventual decomposition spike consumes dissolved oxygen, stressing the whole system.

Correct Answer

Ainitial consumer boom, then oxygen depletion as biomass decomposes

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