The Impact of Global Warming on Marine Ecosystems Global warming has become a major issue that affects various aspects of life on Earth, one of which is the marine ecosystem. As the planet’s average temperature rises, the impact on the ocean is very real and dangerous. One of the main impacts is an increase in sea surface temperatures. Higher temperatures cause stress on marine organisms, such as coral reefs, which experience bleaching. This coral bleaching results in the mass death of coral reefs, which serve as important habitats for many marine species. In addition, global warming causes polar ice to melt and sea levels to rise. As water levels rise, threats to coastal areas become greater. These areas are habitats for a variety of species, including fish and seabirds. This habitat destruction leads to population decline and reduced biodiversity. Meanwhile, increasing levels of carbon dioxide (CO2) in the atmosphere result in increased absorption of CO2 by the ocean. This process causes a decrease in the pH of seawater, which is called ocean acidification. Acidification negatively impacts organisms that have shells, such as clams and mollusks, because it can weaken their shells. This impacts the marine food chain, putting predators and other species at risk. Changes in ocean currents due to global warming also change fish migration patterns. The movement of fish species to cooler regions creates an imbalance in the ecosystem. For example, predators looking for certain fish may not be able to find enough food, causing a decline in their population. This disrupts the entire marine food web. Higher temperatures also trigger an increase in the frequency and intensity of tropical storms. Stronger storms can damage marine ecosystems, such as coral reefs and seagrass beds that function as coastal protection. This further exacerbates the vulnerability of beaches to erosion and damage. The sustainability of marine resources is now threatened. With increasing pressure from global warming and continued exploitation, many species are in danger. For example, tuna and salmon, which are highly sought after by the fishing industry, are starting to decline in some areas. This could potentially result in a global food crisis, given the importance of fish in the human diet. Interventions to mitigate the impacts of global warming are urgently needed. Further conservation efforts should focus on protecting natural habitats such as coral reefs and seagrass beds. In addition, sustainable fisheries management must be implemented to ensure that fish populations do not continue to decline. Public education about the importance of marine ecosystems is also key in maintaining the sustainability of natural resources. The impacts of global warming on marine ecosystems are long-term, and effective mitigation efforts are a must. Without appropriate action, threats to marine ecosystems will increase, and have the potential to directly affect human life. Collaborative steps to face these challenges will be decisive for the future of marine ecosystems.