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.
There are two impacts to the concept of supplying a limiting  nutrient to an ecosystem. The first is negative, when a nutrient  that is currently limiting algal growth (usually nitrogen or  phosphorus) is added to a body of water, you get an algal bloom or  red tide.