Mapping the US: Exploring Natural Heritage Beyond State Boundaries
A new Smithsonian exhibition invites us to view the United States through its natural landscape rather than state lines. By analyzing biomes, fossils, and animal migrations, we can better understand the deep, interconnected natural heritage that spans the American continent.
Highlights
- •The Smithsonian exhibition “From These Lands” examines the U.S. through natural, rather than political, boundaries.
- •Pine cone diversity reveals the influence of fire, climate, and soil on regional biomes.
- •Fossils of ammonites in the Great Plains confirm the existence of the ancient Western Interior Seaway.
- •Animal migrations and specialized habitats, like those for Appalachian salamanders, illustrate deep environmental connectivity.
State borders in the United States are often defined by human history, yet the nation's true character is etched by the natural world. By moving beyond man-made political lines, we can gain a deeper understanding of the country's natural heritage. Examining the nation through its biomes, watersheds, and ancient geological history reveals how interconnected our ecosystems truly are.
Exploring US Natural Heritage Beyond State Boundaries
The Smithsonian’s National Museum of Natural History recently unveiled an exhibition titled, “From These Lands: Sharing Our Natural and Cultural Heritage.” This project, launched for the 250th anniversary of the nation, encourages visitors to view the United States as a tapestry of landscapes rather than a collection of states. From the resilient pine forests of the Southeast to the rugged terrains of the Appalachian Mountains, our environment is shaped by complex biological and geological forces.
Pine trees serve as a perfect example of this natural diversity. With 43 native species, they occupy varied biomes where factors like wildfire cycles and soil quality dictate their growth. For instance, the sand pine relies on fire to release seeds, while the Coulter pine in Southern California produces massive cones that ensure seedling survival. These physical traits are markers of the distinct environments across the continent, reminding us that natural heritage is deeply rooted in local climate and conditions.
Furthermore, the geological history hidden beneath our feet illustrates a vastly different past. During the Mesozoic Era, much of the central plains were submerged under the Western Interior Seaway. Today, fossils of ammonites—predatory relatives of the octopus—found in regions like South Dakota serve as evidence of that ancient ocean. These findings highlight that our current landscapes are merely the latest iteration of a dynamic, shifting world.
Migration and Biodiversity in American Landscapes
The movement of species further demonstrates how nature ignores political demarcations. Shorebirds like the ruddy turnstone undertake incredible journeys, timing their arrival in Delaware Bay to coincide with the spawning of horseshoe crabs. This critical refueling stop is essential for their migration to the Arctic, showing a delicate dependency between species.
Similarly, the high biodiversity of salamanders in the Appalachian Mountains is a result of unique topography. The variety of shaded hollows, streams, and caves allows for specific evolutionary paths, confirming the existence of multiple distinct species. Additionally, the American shad migration highlights the link between aquatic life and human culture. For over 12,000 years, the Pamunkey Indian Tribe has stewarded these fish, proving that nature and culture are inextricably linked. By studying these connections, we better appreciate the vast, complex systems that define the United States beyond any map.
,
