Natural aquatic bodies are being polluted due to untreated effluents released from agricultural, industrial and sewage waste waters. These pollutants are harmfully affecting the aquatic life, including fish (Gagnaire et al., 2004). Among aquatic pollutants, there exist organic and inorganic compounds such as combustible substances, petroleum products, phenol, textile dyes and heavy metals. Among inorganic contaminants, heavy metals are the prominent ones (Jadhavet al., 2010). Fish are more susceptible to the harmful impacts of pollutants and serve as an excellent tool for understanding the health status of aquatic ecosystem (Donohue et al., 2006).
The roots of the riparian vegetation are also significant for it sips most of the nutrient pollutants dissolved in groundwater before reaching the river. If the riparian vegetation was disturbed, the nutrients coming from soil goes to the river, the water temperature increases, and there will be not enough trees that evaporate the running water that directly goes to the river resulting to soil erosion and excess of nutrients such as phosphate and nitrate that result in eutrophication. (Mihov, S. WWF) Eutrophication leads to degradation of oxygen and it causes death of fishes and other aquatic organisms. Disturbance of flora and fauna caused by deficiency of oxygen then follow poor water quality and greatly affects diversity. According to Covich, A.P et al, the presence or absence of a
Water pollution caused by heavy metals is a global problem. The discharge of toxic metals into the ecosystem may severely affect the biotic as well as abiotic components of the environment. These metals are generally derived from different industrial activities such as mining, metal finishing, battery manufacturing, electroplating, etc. and are responsible for contaminating the receiving water bodies even when present in trace amounts. This is due to their carcinogenic and toxic properties (ATSDR, 2013).
Aquatic plants as biological indicator for aquatic pollution One of the major concern in the environmental pollution is heavy metal accumulation in the natural ecosystems. The elucidation of the pollution can be explained by the analysis of water, sediment and surrounding flora and fauna. Especially it has been concerned mostly with the biological flora which is act as an indicator of the pollution. Plants are mostly used, especially the aquatic macrophytes as the water quality indicators in aquatic environments. The flow regimes of the watersheds, the chemical composition of water and the morphological characteristics of the aquatic plants are important features of the water quality.
[Type text] [Type text] [Type text] 1 Human Impact on the Enviroment Human Impacts on the Environment Gary Pace Excelsior College Biology 110 Professor Simmons Our impact as humans on the environment has been drastic, especially for water pollution. Water pollution is the contamination of the water bodies, such as lakes, rivers, oceans, and groundwater caused by our activities. Water Pollution can be deadly for organisms and plants that live in these bodies of water. There are several known ways that humans pollute water, such as dumping garbage in or near the bodies of water, and from spilling oil,, to name a few. Improper disposal of waste can and will have a drastic effect on public health.
Makheraet.al (2010) did the study on monitoring 0f microcystin-LR in Luvuvhu River catchment: Implication for human health. Cyanotoxins in surface drinking water sources are known to pose a threat to human health, of which microcystin-LR is the most investigated. The main aim of the research was to assess the levels of microcystin-LR in Luvuvhu River catchment and to assess the physiochemical parameters that may promote the growth of cyanobacteria. The level of microcystin-LR in some of the sampling sites was<0.18 µg/l. The water quality of the shallow hand dug wells and reservoir water were almost similar.
The ecosystem is suffering from the water use in various industrial processes that comes from the toxic chemical and also from heavy metals and even the radioactive sludge, when they use these kind of mineral they polluted the water because it thrown into the ocean or maybe other water bodies without any treatment, so this process is bad and unhealthy for human and agricultural use ! . The second effect is really a horrible, believe it or not ! It can be on the water for many decades!! , the radioactive sludge at the bottom of the water bodies can remain a highly radioactive , so this process can lead to a serious health risk for people living nearby.
Humanity also received it full harmful effect. The aspect of human society that are affected by pollution of water in the ocean are economic and health. And let’s talk about human health effect throughout the spread of water contamination and pollution since health is vital factor of a human life. From the article “Water pollution and human health”, there are a lot of different diseases that caused by dirty and contaminated water. Like the bacteria called Campylobacter Jejuni, this bacteria is found mostly in untreated fecal water source and it also the cause of 4% to 15% of the world diarrhea cases.
In many aquatic ecosystems, the ability of both prey and predator to detect each other is frequently impaired by turbidity ( Abrahams and kattenfield, 1996).Thus, highly turbid water will affect the aquatic diversity resulting to loss habitat and organism. Water pollution is one of the effects of human activities coming from agricultural run-off, mining run-off, domestic run-off, quarry run-off and so on. Turbidity is affected by several factors in water: presence of dissolved and
Turbidity is finding if the water is clear or not. Turbidity is caused by suspended solid matter in the water and high can be caused by numerous things such as: soil erosion, algal growth and urban runoff. High levels are tubidity is bad because the water losses the ability to support life in the water as the solid matter can block out sunlight . Nitrates and nitrites are chemicals mainly from fertilizers which come from sewage discharge or run-offs from farms nearby. Excessive algea growth can be caused by the presence if nitrates in water which can cause a loss of aquatic life as the algea will block off sunlight into the water  .