Factories create equipment that destroys species in the ocean. When these species are destroyed the food chain is ruined and this threatens the ocean. Over Fishing is also harming the ocean. Entire populations of fish are being killed. Over fishing occurs when there are more fish caught than fish in the ocean to sustain fish stock.
Elevated pH can in turn ‘blind' organisms that rely on perception of dissolved chemical cues for their survival by impairing their chemosensory abilities (Figure 3) (Turner & Chislock 2010). When these dense algal blooms eventually die, microbial decomposition severely depletes dissolved oxygen, creating a hypoxic or anoxic ‘dead zone' lacking sufficient oxygen to support most organisms. Dead zones are found in many freshwater lakes including the Laurentian Great Lakes (e.g., central basin of Lake Erie; Arend et al. 2011) during the summer. Furthermore, such hypoxic events are particularly common in marine coastal environments surrounding large, nutrient-rich rivers (e.g., Mississippi River and the Gulf of Mexico; Susquehanna River and the Chesapeake Bay) and have been shown to affect more than 245,000 square kilometers in over 400 near-shore systems (Diaz & Rosenberg 2008).
The dead zone is littered with the carcasses of dead sea animals. There are 405 dead zones reported world-wide. Natural and Human Impact Dead zones can be caused by both natural and human impact on the environment. High levels of chemical nutrients (nitrogen and phosphorus) cause algae blooms to flourish. After the algae accumulate, it dies, decomposes and depletes the oxygen in the ocean creating a dead zone.
A process called mass bleaching has also become a danger to coral reefs. Mass bleaching happens when water temperatures rise to unusual levels, which then causes the coral to release colorful microscopic algae that usually provide the coral polyps with food. This process affects plankton and other small organisms, which in turn affects the fish that typically feed on such organisms. The affect of climate change on coral reefs is only one prime example of how climate change can affect marine life. Phytoplankton populations have also been affected by the warming temperatures in the ocean.
The large population centres near coasts has led to silting of reefs, pollution by nutrients that lead to algal growth that smothers the coral, and overfishing that has led to increase in number of predators that eat corals. Warming of the ocean causes corals to sicken and die. Even a rise of one degree in the average water
Below the vast swelling body of water lays another world filled with many species of sea animals from the dawn of creation and more that are still left to be discovered. However, this fascinating place is also contaminated with horrifying inventions against nature which must be sought to be protected and conserved. There is a tremendous amount of trash produced each day that can end up in the ocean and further pollute it. A specific focus is placed on the many particles of plastic debris that end up maneuvering through the water. Shockingly, there will result in more plastic in the ocean than fish by the year 2050.
The production of these toxic-filled substances continues to lead the human race on a path of natural destruction; with thousands of animal sea-life dying annually from plastic consumption. It's time we wake up to the fact that our oceans are in need of critical help. How did the plastic get into our oceans to begin with? The oceans are enormous but they are not infinite. Today, as in the past, oceans are being treated as giant disposal areas for all types of refuse (plastics, tins, bottles etc.)
Besides global warming there is another problem with this beautiful structure and that is the result of several local natural and human factors such as over fishing. Silt from deforested lands and pollution from crowded coastlines choke them, and overuse and destroy coral reefs. There are many other factors which if they are not stopped it will destroy all coral reefs. Corals are animals, not plants; sunlight is the key to their survival. They need it to power the millions of microscopic algae, called zooxanthellae, that live in their tissues.
The Consequences of Overfishing Overfishing has been identified across the world as a prominent environmental issue. Fish and other marine animals, such as sharks, sea turtles and dolphin, are retrieved from the oceans through indiscriminate fishing practices at a rate that cannot be sustained by natural reproduction (Jackson, 2001). Systematic overfishing with bottom trawling, dredges, and drift nets depletes the ocean of innumerable species at an alarming rate and alters the ecological balance in marine environments. The actions of shortsighted commercial fishermen have brought tremendous adverse environmental and economic consequences upon the entire world. The continuation of unrestricted fishing will worsen world hunger among impoverished coastal communities, many of whom depend on the abundance of fish to feed themselves and their families, and result in ultimate environmental chaos and the extinction of thousands of In recent years, the demand for fish, a healthy food rich in omega-3 fatty acids and lean protein, has sky-rocketed.
Coral reefs are home to more than a quarter of all marine life and provide the foundation that many ecosystems need to survive. These reefs are known to be extremely fragile and slow-growing. But due to a number of threats, the world's coral is being harmed and destroyed at an alarming rate. When a reef is found unable to maintain an ecological balance, the effect fishing has on the reef can be detrimental. Humans have been known for destroying coral reefs through unlawful fishing habits.