Answer to Question #282020 in English for lei

Question

What will be the effects of climate change on agriculture and fishery to globalization?

Answer 1

Climate change is projected to have a considerable influence on freshwater fisheries and aquaculture. The productivity of rivers, lakes, and floodplains will be impacted by greater variability in precipitation and changes in air and water temperatures. Increased carbon dioxide emissions are linked to climate-related physical and chemical changes. Aquatic ecosystems are absorbing a huge portion of these emissions, causing significant changes in aquatic ecosystems and impacting the vital services they provide for food security and livelihoods.

Changes in salinity and freshwater content; oxygen concentration; carbon uptake and acidification; temperature and thermal stratification; sea levels; ocean circulation; surface wind, storm systems, and waves are examples of climate-related changes that affect ecological functions and the frequency, intensity, and location of extreme weather events. These changes are likely to have a variety of direct and indirect effects on fisheries and aquaculture. Individual climate causes have varying degrees of scientific knowledge, and information on the combined effects of various drivers is scarce. This unpredictability makes it difficult for the sector to plan for adaptation. Pollution, dam development, and irresponsible fishing are all contributing to the detrimental effects of climate change. Climate change is altering the distribution of marine organisms, according to evidence. To find their perfect ecological circumstances, many species are migrating to the poles and deeper oceans. Changes in interaction dynamics among species, trophic linkages, and food webs result from these migratory patterns. Many aquatic species are likely to change in size, reproductive cycles, and survival rates if migration is not possible. The good and negative effects will vary depending on the region and latitude. Certain commercial species are likely to migrate offshore and away from typical fishing grounds, leaving a vacuum for other invasive species to occupy. Novel livelihood options may exist in some areas if these new species are fit for human or animal food. Ecosystem productivity is anticipated to be lowered in most tropical and subtropical marine settings, seas, and lakes, notwithstanding the incursion of species that are tolerant of higher temperatures and changes in the chemical content of coastal waters. Capture fisheries production is expected to grow in high-latitude systems, but to decline in low- and mid-latitude systems, according to projected scenarios. Temperature rises, hypoxic zones, acidification, and extreme weather events are all threats to coastal systems.

Climate change is projected to have a considerable influence on freshwater fisheries and aquaculture. The productivity of rivers, lakes, and floodplains will be impacted by greater variability in precipitation and changes in air and water temperatures. Non-climatic causes, such as invasive species, pollution and habitat change, and river fragmentation by dams, often amplify climatic drivers (e.g., greater temperatures) affecting inland ecosystems and species distribution. Freshwater reservoirs will be more stressed at the regional level to fulfill the growing demand for irrigation. In general, inland fisheries will be threatened in locations where water stress is severe and water supplies are scarce.