Five ocean currents run close to the coasts at mid-latitudes-the Canary Current off northwest Africa, the Benguela Current off southern Africa, the California Current off California and Oregon, the Humboldt Current off Peru and Chile, and the Somali Current off Somali and Oman.These currents all support major fisheries.These regions are likely so productive because
A) they receive fresh water from rivers.
B) their clear water allows light to penetrate to great depths.
C) the temperature is warmer here than in the open oceans.
D) humans supplement the water with nutrients to maintain the fisheries.
E) they receive nutrients from coastal upwelling.

Question

Quizplus · Accepted Answer

These regions are likely productive because they receive nutrients from coastal upwelling. Upwelling occurs when strong offshore winds push water away from the coast, allowing nutrient-rich water from the ocean's depths to rise to the surface. This nutrient-rich water supports the growth of phytoplankton, which are the foundation of the marine food web. The phytoplankton then support higher trophic levels, including the major fisheries found in these regions.

Five Ocean Currents Run Close to the Coasts at Mid-Latitudes-The