Understanding the Primary Purpose of the Passage

In the excerpt from a nature documentary, the narrator describes a thriving coral reef ecosystem: "The vibrant underwater world of coral reefs is not only a visual spectacle, filled with myriad species of fish and lush, colorful corals, but it also plays a crucial role in maintaining the health of our oceans. These ecosystems are vital for biodiversity and provide shelter for countless marine creatures. However, the delicate balance of this underwater paradise is under threat from climate change and coral bleaching. It is essential for us to understand the complexity of these ecosystems to foster better conservation efforts."

Based on this passage, what is the primary purpose of the author?