Difference Between A Marsh, A Swamp, A Bog, And A Fen. In A Nutshell. The worldâs wetlands are ecosystems in themselves, and are defined by the flora and fauna they support. Marshes are nutrient-rich wetlands that support a variety of reeds and grasses, while swamps are defined by their ability to support woody plants and trees. Bogs are characterized by their poor soil and high peat content, while fens have less peat and more plant life than a bog.
Many adult Labradors will sleep for well over half of every 24 hours, and puppies under four months old may sleep as much as 20 hours a day.
How It Is Done. Sleep studies are usually done by a trained sleep lab technician. The studies are usually scheduled for evening and night hours (10 p.m. to 6 a.m.) in a special sleep lab. But if you usually sleep during the day, your test will be done during the hours you normally sleep. You will be in a private room, much like a hotel room.