Wheeler J. North studied the effects of El NiÃ±o on this type of ecosystem.
Wheeler J. North studied the effects of El NiÃ±o on this type of ecosystem. Jon M. Erlandson theorized that the Americas were populated by people traveling along a "highway" consisting of these ecosystems. Along with grasslands, this type of ecosystem made its first appearance in the Miocene epoch. The predominant species in these ecosystems are Lessonia, Ecklonia, Laminaria, and the most common, Macrocystis. These ecosystems stay upright with the help of (*) gas-filled pneumatocysts located at the base of fronds near the stipe. These ecosystems are farmed to extract alginic acid. These ecosystems are destroyed due to unchecked grazing by sea urchins, which is why sea otters are a keystone species for them. For 10 points, name these aquatic ecosystems formed by a type of brown seaweed.
Wheeler J. North studied the effects of El NiÃ±o on this type of ecosystem.
kelp forests [or kelp beds] 