Overfishing may help people to get food, but what of the future? The sea has a lot of fish but It is bound to run out of fish to feed humankind or and other living things. Overfishing has been around from 1970 to now. Then some of the fish are high priced that people want them more so the fish that they are becoming increasingly extinct. According to Roney, “calculating that forage fish generate nearly $17,000,000,000 per year in reported catch--$5,600,000,000 for the small fish themselves and $11,300,000,000 in landings of the fish that eat them.”
In the summers the temperature of the water increases and causes a decrease in the amount of food. The warmer waters disturb the normal flow of the nutrients from the cooler water depths. “An El Niño will occur approximately every two to seven years” (wildlife.ca.gov). The effects of an El Niño can be sensed all over the globe for over a year. The last El Niño to have occurred was in the summers of 1997-98 and it resulted in a colossal decrease of young fur seals.
Without these medications, a lot more of the human population will be in danger without medication to have when they are sick. Cho also tells us that reefs provide us with construction materials like limestone, and shoreline protection through waves, storms, and flood. The corals act as a buffer by forming barriers to protect the shorelines. According to The Reef Resilience Network, “500 million people rely on coral reefs for food, coastal protection, and livelihoods. ,”, but, “Losing the coral reefs would have profound social and economic impacts on many countries, especially small island nations like Haiti, Fiji, Indonesia, and the Philippines that depend on coral reefs for their livelihoods. ”(#7)
Furthermore, another ecological hazard that this incredible animal faces is fishing and it’s equipment. According to the text, “Modern fishing methods have created some serious problems for the ocean. The populations of almost all fish species that we eat have shrunken,”(Dignan 14). This proves that another environmental threat that blue crabs faces are fishing because they may not be a type of fish, but, like most crabs, they are fished, caught and sold. This allows overfishing to be a problem.
Ocean acidification leads to a reduction in the amount of carbonate ions in the water. Many marine animals essential carbonate ions for the calcium carbonate essential to form skeletons and shells. This will disturb their development and ability to reproduce – ultimately threatening their populations.. Falling numbers of less well-known species, like pteropods – tiny swimming snails – have important effects further up the food chain. Pteropods are important sources of nutrition for many types of fish, whales and birds in polar and sub-polar regions.
Populations of these animals either increase dramatically or decrease dramatically, e.g. the crabs that would eat these fish in 1992 had their populations increase suddenly, due to the loss of their main predator, whereas shark numbers and other predators of the fish would decrease due to lack of food. As a result, these animals will hunt other fish and decrease the population and etc, resulting in a mass increase and decrease of populations in the ocean. Some major issues surrounding overfishing are environmental sustainability, unemployment and economic loss. The questions that the issue of overfishing poses are ‘do the benefits of overfishing outweigh the disadvantages?’
but it’s endangering to sharks because they don’t breed very quickly due to their biological composition (NewsCurrents Read to Know). Sharks reproduce very slowly and they can’t keep up with the rate that humans are killing them off at. With that inbalance, they’re getting closer and closer to extinction everyday, but with a ban on finning that would cut down over half of those casualties and keep the sharks from dying off. Consequently, because they’re being killed off in large unmoderated amounts there a species of sharks already extinct and in "Bad to the Bone", written by Michael A. Rivlin, he writes “Because of such biological profiles, most shark fisheries have experienced brief booms, followed by long busts. To take one notorious example, in 1961 Norwegian longliners began catching porbeagle sharks in the Northwest Atlantic.
This opened a great zone of carbonate substrate for colonization, therefore coral cover remained low and coral recruitment was decreased through March 2001 (R.B. Anonson et al, 2002). Surveys done in October 22-23 showed that all the Lettuce coral were bleached white and by late October some already died. The skeletons stood in their growth stance showing recent death (“the standing dead”). Other surveys done from 1999-2000 revealed the almost total decline in the Lettuce coral and large death in other species (R.B. Aronson, 2015). At the start of the late 1980’s, white band disease almost destroyed the St. aghorn corals, Aeropora cervicornis from reefs in the central shelf lagoon of Belize.
This is due to what is known as the transitional range of temperatures, which is defined as the range of temperatures at which the sex ratio shifts from 100% male to 100% female (Hanson 1998). The transitional range of temperatures for sea turtles is generally less than 2°C and may be less than 1°C for loggerhead sea turtles. As the mean warming is projected to be over 2°C over the next 100 years, this has serious implications for the sustainability of sea turtle populations (Jribi and Bradai 2014). A rise in 1°C or more in the next fifty years may induce the production of single-sex generations and consequently lead to population extirpation (Hays et al. 2010). If the temperature change is severe enough, the amount of population extirpations may lead to extinction of the entire species.
The loss of land from sea level rise will also cause the population to fall and we can expect the carrying capacity to reach limits. As global temperatures increase by 2.5 Celsius above pre-industrial levels and sea level rise at about 12-37cm, we are expecting to see remaining land area in the keys to decline from 80% to 30%. The loss of the surrounding populations in the Florida Keys is contributing to low economic growth, which provides conservation funding for the Florida Keys. These socio-economic changes would restrict our conservation budgets for the Florida Keys. We can counter these events with good conservation management, strong community support and resilience efforts.
In May 1991, zebra mussels were found in the Hudson River. 500 billion of these mussels were found in the course of a year. They looked seemingly harmless, but over time these mussels became a sort of threat. They were destroying the microscopic animals in the river. On the other hand, they also help out by a ton.
Subject- Deforestation affects majority of the population, including people and animals, across the nation and in my community. Situation or Problem- Deforestation is the action of eliminating trees, in forests, by cutting them down. The objective of deforestation is to create more land for construction and land establishments with the idea of not restoring thee trees back or replacing them. How it affects my community- Deforestation can disrupt the homes of many animals, including birds and fish.
Incredible beaches, marine life, and weather are just a few of the things that make the Florida Keys an amazing place. The Florida Keys are a string of islands located off the tip of Florida, which protrude out into the Gulf of Mexico and into the Atlantic Ocean. The oceanography of the Keys are unique because of several factors, including the geologic history, the tides and waves, and the effects of natural and man made threats to the Keys themselves and the thriving marine life. The map below shows the stretch of islands and the many reefs that are right off the coasts of the islands (Florida Keys Map) Geologic History Thought to have emerged from ancient coral reefs or patch reefs that had eroded, the Keys are a bit of a mystery in terms