Which two ecosystems are commonly found in Nebraska?

The choice highlighting grasslands and wetlands as commonly found ecosystems in Nebraska is accurate due to the state's geographical and climatic conditions. Nebraska predominantly features mixed-grass prairies, which are a critical aspect of its identity. These grasslands support a diverse array of flora and fauna, serving as essential habitats for numerous species. The expansive prairies are complemented by the presence of wetlands, including marshes, swamps, and floodplains. These wetland areas are vital for water quality, groundwater recharge, and providing habitat for wildlife, especially migratory birds.

While other ecosystems such as forests and rivers do exist in Nebraska, they are not as prevalent in comparison to the grasslands and wetlands. Likewise, deserts, mangroves, and tundras are not naturally occurring ecosystems within the state’s climate or ecological characteristics. Thus, the pairing of grasslands and wetlands distinctly reflects Nebraska's ecological landscape.