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← GeographyWhich perturbation results on kelp forest ecosystems during El Niño?
A)Nutrient upwelling is significantly reduced✓
B)Salinity increases near the surface
C)Increased CO2 absorption capacity occurs
D)Thermocline shallows as trade winds strengthen
💡 Explanation
El Niño suppresses upwelling, decreasing nutrient availability for kelp. This reduction is driven by a weakening of trade winds because this reduces coastal upwelling driven by the Ekman transport, therefore stresses the kelp forests, rather than increased salinity or increased CO2 absorption.
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