- Between the 1970s and 1980s, many Black Sea beach resort in Romania and Ukraine founded 60 million tons of bottom living life rotting from hypoxia.
- The benthic life, or bottom living life fishes, died because there is a little oxygen in the water for them to survive
- Polluted runoff from the land triggers dead zone conditions.
- Most dead zones are created by eutrophication, the overenrichement of the sea by nutrients that help plant growth,
- When phytoplankton increases by the abundance of nutrients, nitrogen and phosphorus, they block off the sunlight and the plants living below them dies because of a reduced amount of sunlight.
- A smaller amount of oxygen when bacteria devour oxygen to break down the masses of organic matter that have died during eutrophication.
- In every dead zone has occurred by eutrophication leading to phytoplankton to grow, overloaded bacterial activity at the bottom, less oxygen, and the death of plants and animals that are living.
- The Millennium Ecosystem Assessment released by the UN in 2005 stated that the supply of nitrogen-containing compounds to the sea grew by 80% from 1860 to 1990.
- Trophic cascading is a sequential process when the loss of top fish species leads to rises in the numbers of small prey fish, resulting fewer zoo plankton and more phytoplankton
- Increased nitrogen poured into Black sea was resulted by modernized farming, intensive use of fertilizers, and establishment of huge animal production facilities
Dead zones are created by eutrophication, a process called eutrophication, it is the overenrichement of the ocean by nutrients, nitrogen and phosphorus. If the phytoplankton increases due to the abundance of the nutrients, they shade the sunlight from the plants that are below them, resulting hypoxia. The oxygen only enters into the ocean by photosynthesis and physical diffusion from the atmosphere but the phytoplankton shade the sunlight making the plants and fishes below dies, making the bacteria to break down organic matter used up amount of limited oxygen. As the bacteria breaks down the organic matter they used up all the oxygen, making the oxygen limited. It all happens when all nutrients are being washed off land and runoff into the streams and ended up in the ocean, it is caused by agricultural runoff, urban and industrial waste water, atmospheric transport, use of fertilizers, and the establishment of huge animal production facilities. The only solution for this problem is that the reduction in agricultural and sewage runoff, controlling of over fishing to cause marine organism to build up
After reading this article, I think that we should taken an action to this kind of a problem, it is not a hard solution to fix this problem regarding to dead zones, its just that we should have have taken into more recognition for this problem. This dead zone problem can be easily fixed but its hard to fix it if it was all to late. We, humans are part of this problem so we should take responsibility to help and reduce to this problem. If this was not taken too recognition today, then when? The article stated that the problem started many years ago, then today, its becoming worse, then what is in us for the future? This problem could lead us to dead zones everywhere causing the fishes and plants to die due to hypoxia, its not good for the ecosystem and for us too.
After reading this article, I think that we should taken an action to this kind of a problem, it is not a hard solution to fix this problem regarding to dead zones, its just that we should have have taken into more recognition for this problem. This dead zone problem can be easily fixed but its hard to fix it if it was all to late. We, humans are part of this problem so we should take responsibility to help and reduce to this problem. If this was not taken too recognition today, then when? The article stated that the problem started many years ago, then today, its becoming worse, then what is in us for the future? This problem could lead us to dead zones everywhere causing the fishes and plants to die due to hypoxia, its not good for the ecosystem and for us too.