The ocean is one of our best examples showing us that natural phenomenon like droughts don’t just affect the specific place that it is occurring. Take for example the drought in the Murray River, the very low flow has not only affected life in the river, but it is reducing the amount of phytoplankton in the water, which make up the base of all ocean life.
This not only shows how far the influence of places like rivers reaches but also how necessary they are in maintaining the balance between different ecosystems. This happens because these phytoplankton depend on nutrients brought to them by the freshwater currents. With the river dropping extremely below where the water sits normally it is not able to carry those nutrients to the local marine life.
This began in the early 2000s, during early 2001 a dry period began where a minimal amount of water was leaving the mouth of the river. By the year 2007, water had stopped leaving the mouth completely. This just shows how quickly we need to make changes in order to conserve water or we could throw our entire planet out of balance.