On the other hand, the importance of Daphnia in the food chain is significant as Daphnia is preyed upon by several aquatic organisms such as tadpoles, salamanders, aquatic insects, and many of small fish species. Ultimately, and by the end of the chain, food fish for human consumption could be affected as a result of the negative changes in Daphnia
Algal blooms will “reduce light availability, which often leads to losses in submerged aquatic vegetation which are important nursery habitats for many finfish and shellfish species” according to the Woods Hole Oceanographic Institution (2018). Given these points, aquatic life has negatively
If human being consumes these contaminated organisms, toxic compound will be accumulated in human body. Deeper approach of natural science such as biomedicine is important related to marine contamination. Biomedicine knowledge particularly in anatomical, physiological, genetic and biochemical models are proven to be very useful to explain the impact of contamination in life organisms in marine ecosystem. Furthermore, it can also develop explanation about what kind of disease that might be created because of the toxic compound entering the food chain (Hansen, 2007). For example is the case of Minamata in Niigata prefecture, Japan, where heavy metals produced by chemical factories pollute marine area can enter the food chain and accumulate in marine organism and even human
Water pollution is a very prevalent problem throughout the world. It affects ecosystems, deters the natural food chain, and can cause disease in both animals and humans. But is water pollution affecting natural lakes and ponds in local areas? In this experiment, Daphnia magna will be used in a bioassay to find if water from local areas is habitable for aquatic organisms. Daphnia magna are small freshwater invertebrate organisms.
As mentioned in an article named, “Causes of Drought: What 's the Climate Connection?” different types of droughts and how they are created is explained. It is mentioned that “agricultural droughts can occur for a variety of reasons, including low precipitation, the timing of water availability, or decreased access to water supplies” (UCSUSA). All of these aspects are affected by climate change, therefore, increasing the risks of droughts. Water is a vital source for agriculture; in fact, many of the world’s water supply already goes to agriculture. To be specific, 70% of fresh water goes to agriculture and this can increase up to 90% in drier regions (Gilman).
As observations were conducted on multiple reefs, however, a major decline in the water quality and coral coverage of reefs worldwide had declined dramatically. It was upon these observations that the reefs ability to self sustain was questioned (P. Harris, 2012). Their structure is resilient to most natural disturbances, however, they are extremely vulnerable to human interference such as the nutrient contamination of their water quality that has occurred. The contamination this study focuses on is as a result of fertiliser and other nutrient rich pollution which have contaminated these coral sanctuaries. This contamination has lead to great loss of coral coverage.
The nature of aquatic systems is in a very delicate balance that is easily altered when chemicals and nutrients are added to the water. One example of this are the Cladophora, which are attached green algae in Lake Ontario. It grows during the summer and lives on nutrients such as phosphorous that make their way into both naturally and through pollution in the form of soaps and fertilizers . The more pollution that flows into Lake Ontario the faster the decline in aquatic health. These contaminants that flow into the water system effect the food web to a large extent.
The excess nutrients may induce pathogen and provide the elements required by the pathogen to proliferate or become directly toxic to the coral making them more susceptible to the disease.The imbalance in the exchange of nutrients between the zooxanthellae and the host coral reduces light penetration to the reef due to nutrient-stimulated phytoplankton growth, and, most harmful of all, may bring about proliferation of seaweeds (Dubinsky, 1996).Nevertheless, the study had discovered that the coral capable to recover and revive once the nutrients supplies stopped. Last but not least, various chemicals of pesticides and fertilizers from agriculture practices are flowing into the water cycle via soil infiltration and surface run-off. One of the most critical threats
The coastal margins are seen to be potential sources of hazardous trace elements, as the effluents are discharged into waterbodies and finally flushed out to the open ocean. About 17104 m3/day of effluents reach the Sea from various small and large scale industries situated along the southwest coast (Udayakumar et al., 2014). The symptoms are there to show considerable impact of deterioration of estuarine waters on the coastal ecosystem (Jayakumar et al., 2001). Hence, determining the level of metals in the coastal margins could provide a better understanding of possible sources, ecological risk, and transport
However, mild climate related disasters are quite frequent to happen lately. These refer to the occurrence of floods and droughts that caused significant socio-economic impacts to the nation while the occurrence of landslides due to excessive rainfall and strong winds happened at the hilly and the latter, at the coastal areas caused minimal damage. In agriculture, one of the matters that affected continuously is flood. Sometimes water levels can rise slowly and unnoticed. Other time, flooded can be rapid, sudden and unexpected.