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.
Quick Answer. A freshwater ecosystem is a type of aquatic ecosystem with a low salt concentration. It includes lakes, ponds, springs, rivers, streams and wetlands. It may be divided into two categories: the lentic or still water ecosystem and the iotic or the flowing water ecosystem.