Wetlands serve as some of the most complex and important ecosystems on Earth, providing habitat for many plants and animals, collecting and filtering water, and reducing the amount of damage from floods and heavy rainfall. Wetlands go by many alternative names, including swamps, marshes and bogs. They vary slightly in physical composition; some wetlands contain primarily trees, while others contain brush and shrubs, but all perform equally important ecological roles.Know More
In the United States, wetlands serve as homes and form critical habitats for nearly 50 percent of the nation's federally endangered plant and animal species. Fish, birds, amphibians and many types of plants require the resources found only in wetlands for survival. In addition to protecting threatened and endangered species, wetlands control flooding by acting as large sponges, filling with excess water when heavy rains fall. A single acre of wetlands might store over 1 million gallons of water, making them ideal natural sources of flood control. The trees and brush in wetlands anchor soil and vegetation to the ground, which ultimately reduces wind and soil erosion.
Wetlands provide humans with recreational opportunities and offer economic benefits as well. They supply ample amounts of shellfish along with cranberries, blueberries and wild rice. Waterfowl hunting within wetland boundaries proves lucrative, and some medicines derive from ingredients found only in wetlands.Learn more about Earth Science
A sea cave, also called a littoral cave, begins as a small crack or weak spot in a cliff beside the sea. Ocean waves – salty water full of gravel and sand pound against this spot for centuries, slowly enlarging it and hollowing out a cave in the side of the cliff.Full Answer >
The tundra is a large habitat that is both the coldest and the driest of all biomes. The tundra biome is found in the Arctic Circle and Antarctica.Full Answer >
The ocean ecosystem, also known as the pelagic zone, is the largest collective ecosystem on Earth. Open waters have the greatest volume and depth of any living zone on the planet. The basis of ocean life is plankton, which are microscopic plants that move along ocean currents. Small animals such as krill eat plankton, and then progressively larger animals eat krill. Ocean ecosystems cover 70 percent of the Earth.Full Answer >
According to the U.S. Geological Survey, about 71 percent of the Earth is covered in water. The total volume of all the water is equal to around 332.5 million cubic miles.Full Answer >