Multiple Choice
Which of the following is a way that groundwater depletion affects streams?
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48. Ecology
Introduction to Ecology
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In a simple grassland food web consisting of grass, grasshoppers, frogs, and hawks, which organism is a primary consumer?
A
Hawk
B
Grass
C
Frog
D
Grasshopper
Verified step by step guidance1
Step 1: Understand the concept of trophic levels in a food web. Producers (like grass) are at the base of the food web, converting sunlight into energy through photosynthesis. Consumers are organisms that feed on other organisms, and they are classified as primary, secondary, or tertiary consumers based on their position in the food chain.
Step 2: Identify the producer in the food web. Grass is the producer because it uses sunlight to create energy and serves as the base of the food web.
Step 3: Define a primary consumer. Primary consumers are herbivores that feed directly on producers. They obtain energy by consuming plants or other autotrophs.
Step 4: Examine the organisms in the food web. Grasshoppers feed on grass, making them herbivores and primary consumers. Frogs and hawks are higher-level consumers because they feed on other animals.
Step 5: Conclude that the grasshopper is the primary consumer in this food web, as it directly consumes the producer (grass).
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