Final answer:
In the Northern California ecosystem, Giant Sequoia trees represent a genetic adaptation to wildfires with serotiny, promoting forest regeneration.
Step-by-step explanation:
A genetic adaptation that has developed in the Northern California ecosystem for resistance to wildfire is seen in the Giant Sequoia tree species. These trees display serotiny, where their cones require the heat from fire to open and release seeds, ensuring germination as it also clears the litter on the forest floor for seed contact with the soil. This adaptation facilitates the regeneration of forests after a fire, thus contributing to the ecosystem's resilience.
An observed behavioral adaptation in response to wildfires within the same ecosystem is that some animals have evolved to recognize the approach of fire and move to safer areas, or they have adjusted their breeding cycles to avoid the fire seasons. Additionally, certain bird species may benefit post-wildfire by having easier access to prey in the altered landscape.