Multiple Choice
Insects are most likely found in which aquatic zone?
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48. Ecology
Introduction to Aquatic Biomes
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As the depth of ocean water increases, which of the following changes occurs?
A
Temperature increases and salinity decreases.
B
Oxygen concentration increases and light availability increases.
C
Light availability decreases and pressure increases.
D
Pressure decreases and temperature remains constant.
Verified step by step guidance1
Understand the relationship between ocean depth and environmental factors: As depth increases, several physical and chemical properties of the ocean change, including pressure, temperature, light availability, and salinity.
Analyze pressure changes: Pressure increases with depth due to the weight of the water above. This is a direct relationship governed by the formula \( P = \rho g h \), where \( P \) is pressure, \( \rho \) is the density of water, \( g \) is gravitational acceleration, and \( h \) is depth.
Examine light availability: Light availability decreases with depth because sunlight is absorbed and scattered by water molecules and particles. This is why deeper parts of the ocean are dark and lack photosynthetic activity.
Consider temperature changes: Temperature generally decreases with depth in most parts of the ocean, especially in the thermocline layer, where there is a rapid drop in temperature. However, in deeper layers, temperature may stabilize near freezing.
Summarize the correct answer: Based on the analysis, the correct changes that occur as ocean depth increases are that light availability decreases and pressure increases.
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