In addition, the hoseâs volume fluctuation decreases the hydraulic system reaction time and efficiency. By comparison, the expansion of metal tube is negligible, which makes it a preferred choice for applications requiring accurate positioning.
Aquatic Ecosystems. Most aquatic ecosystems are limited by salt concentration and the availability of sunlight, oxygen and nutrients. For example The Dead Sea is âdeadâ because the salinity is so high and nothing can grow in it.
Vocabulary. 1  Abiotic: The nonliving components of an ecosystem. 2  Aquatic: Related to water. 3  Biomes: Regions on Earth with similar climate and organisms. Examples: freshwater aquatic, saltwater aquatic, desert, forest, tundra, and grasslands. 4  Biotic: The living components of an ecosystem. Bog: A type of wetland that contains acidic peat, a deposit of dead plants, usually mosses; also called a mire. Ecosystem: An ecological community, including plants, animals, and microorganisms, as well as the abiotic factors in the environment. Fen: A type of wetland fed by surface water, or groundwater, or both. Fens are characterized by their water chemistry, which is neutral or basic.