Final answer:
The second phase of succession in wetlands is known as the pioneer species stage. During this stage, grasses and other early colonizers establish themselves in the wetland, followed by the establishment of shrubs and emergent vegetation.
Step-by-step explanation:
The second phase of succession in wetlands is known as the pioneer species stage. Secondary succession occurs in wetlands when there is a disturbance, such as flooding or a natural disaster. During the pioneer species stage, grasses and other early colonizers establish themselves in the wetland.
This is followed by the establishment of shrubs and emergent vegetation which are rooted in the soil but have portions extending above the water's surface. These pioneer species help stabilize the wetland and create conditions for other plant species and wildlife to thrive.