tailieunhanh - WATER POLLUTION AND ITS IMPACT ON FISH AND AQUATIC INVERTEBRATES

Stormwater runoff reduces water clarity and lowers the value of lakeside properties. Florida Friendly landscaping helps reduce stormwater from entering the lake by helping it soak into the ground, preventing damage to lake water quality and loss of property value. Examples of improvements HOAs might find they need are: mulching a pathway, planting ground covers, establishing a buffer zone of shrubs and other plants along the shore of their retention pond, diverting stormwater water away from a driveway or building, and pumping the septic system regularly. All of these and other practices are known to reduce erosion or. | INTERACTIONS FOOD AGRICULTURE AND ENVIRONMENT - Vol. I - Water Pollution and its Impact on Fish and Aquatic Invertebrates - Shesterin Ivan Semenovich WATER POLLUTION AND ITS IMPACT ON FISH AND AQUATIC INVERTEBRATES Shesterin Ivan Semenovich All-Russian Research Institute of Freshwater Fish Culture Russia Keywords heavy metals pollution water bodies fishes invertebrates oil products hydrocarbons toxicity accumulation. Contents 1. Heavy Metals 2. Organic Compounds Glossary Bibliography Biographical Sketch Summary This chapter describes the influence of heavy metals on hydrobionts presenting generalized information on heavy metal distribution in the atmosphere atmospheric precipitation bottom sediments of rivers and lakes of different regions of the world. Data on metal concentrations in water of a number of water bodies in Russia are compared and some water quality criteria for heavy metals in different countries are discussed. Special attention is given to the danger of mercury. It is shown that the most globally widespread organic pollutants are oil and oil products chlorinated organic hydrocarbons and polycyclic aromatic hydrocarbons. The highest levels of hydrocarbon content are typical for inland seas as well as for near-coastal and shelf zones and for seas where oil production and transportation are carried out. A general scheme is presented for development of biologic effects of oil pollution including acute and chronic impact on hydrobionts. It is noted that chlorinated hydrocarbons as well as oil products and heavy metals have become toxicants of global abundance. 1. Heavy Metals Of the many different toxic compounds present in aquatic ecosystems the heavy metals are considered by some to be the most hazardous. It is clear that the anthropogenic input of heavy metals is much higher than the natural input. For example anthropogenic input is almost double the natural input of mercury and for copper lead and zinc it is greater by an order of magnitude. This is