National Geographic Society on Instagram: "Many of the world’s most biodiverse and productive ecosystems thrive in the dynamic interface where land meets water. These “Blue Boundary” environments — freshwater wetlands, coastal systems and reefs — form a web of deeply connected ecosystems that balance, depend on and sustain one another, creating stability and resilience. They provide vital habitat for nearly half of all species on Earth and support fisheries, clean water and shoreline integrity t