Multiple Choice
Which of the following is the primary cause of surface currents in the world's oceans?
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48. Ecology
Introduction to Ecology
Multiple Choice
Which of the following is an example of an abiotic change in an ecosystem?
A
A new predator species migrating into the area
B
An increase in the population of herbivores
C
A prolonged drought reducing water availability
D
The spread of a plant disease among local flora
Verified step by step guidance1
Step 1: Begin by understanding the term 'abiotic.' Abiotic refers to non-living components of an ecosystem, such as sunlight, temperature, water, and soil. These factors influence the living organisms within the ecosystem but are not themselves alive.
Step 2: Analyze each option provided in the question. Determine whether the change described is caused by a biotic (living) factor or an abiotic (non-living) factor.
Step 3: Option 1: 'A new predator species migrating into the area' involves a living organism (predator), so this is a biotic change.
Step 4: Option 2: 'An increase in the population of herbivores' also involves living organisms (herbivores), making this a biotic change.
Step 5: Option 3: 'A prolonged drought reducing water availability' involves water, which is a non-living component of the ecosystem. This is an abiotic change. Option 4: 'The spread of a plant disease among local flora' involves living organisms (plants and pathogens), making this a biotic change.
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