that protect fish from bacteria and parasites‚ and can damage the gills of the fish (Detergents occurring in freshwater‚ n.d.). Detergents also will reduce the breeding ability of the aquatic organisms in the river. Besides‚ detergents will reduce surface tension of water and increases the probability of organic chemicals to be absorbed by the aquatic organisms (Detergents occurring in freshwater‚
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The world’s population is growing at 1.1 per cent per year‚ having surpassed 7 billion people in late 2011. It is expected to rise to 9.1 billion people by 2050. This growth is unprecedented and is being felt mainly in the developing world. Due to the unprecedented growth rates being experienced and uneven distribution of population growth occurring it is resulting in huge amounts of pressure on the natural environment‚ drastic global inequalities and is affecting age structure and employment in
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However‚ the most familiar turbellarian is the freshwater planarian Dugesia. 3. Planarians have a spade-shaped anterior end and a tapered posterior end. 4. They move through the water by swimming with a wave-like motion of their body. 5. Over solid surfaces‚ planarians glide on a layer
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14(1):57-72. Matz‚ C.J.‚ Treble‚ R.J.‚ and Krone‚ P.H. (2005). Accumulation and elimination of cadmium in larval stage zebrafish following acute exposure. Ecotoxicology and Environmental Safety 66:44-48. Memmert‚ U.‚ (1986). Bioaccumulation of zinc in two freshwater organisms (Daphnia magna‚ Crustacea and Brachydanio rerio‚ Pisces). Water Research 21(1): 99-106. Misra‚ S.‚ Zafarullah‚ M.‚ Price-Haughey‚ J.‚ Gedamu‚ L. 1988. Analysis of stress induced gene expression in fish cell lines exposed to heavy metals
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WWF’s mission………………………………………………………7 2.3. WWF guiding principles……………………………………………8 3. Danube-Carpathian Region………………………………………………….9 3.1. WWF Danube-Carpathian Programme……………………………...10 3.2. WWF solutions……………………………………………………...11 3.2.1. Danube/Freshwater Programme…………………………..…..11 3.2.2. Carpathians/Forests & Protected Areas ……………………..12 3.2.3. Green Public Funds…………………………………………..13 3.2.4. Climate Change……………………………………………….14 Conclusion……………………………………………………….…………..……16 INTRODUCTION
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1. Threats to the Great Barrier Reef \What are the threats to the Great Barrier Reef?\ In contemporary‚ the Great Barrier Reef has emerged numerous threats to the situation‚ in spite of the fact that it fetches billions of dollars into national economy from over two million tourists and over 700 tourism operators every year and supports more than 50 000 jobs. Furthermore ‚ (“Great Barrier Reef‚”2009) 2.1 Threats to the Great Barrier Reef of human factor One of the part of the risk
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growing more; Americans can’t afford to lose food‚ it’s too valuable. Getting food to houses in the US takes up to 10% of the US total energy budget uses 50% of US land and takes 80%of freshwater consumed in US. But stilll40% of the food in US remains uneaten. People are throwing away $165 billion and 25% of freshwater and large amount of chemicals‚ energy and land away causing 25% of US methane emissions. Food saved by decreasing losses to 15% can feed more than 25milllion people in U.S a year‚ when
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1. An area of the forest that experiences very little change in species composition is a climax community/primary succession. Climax community 2. The amount of oxygen in a fish tank is a tolerance zone/limiting factor that affects the number of fish that can live in the tank. Limiting factor 3. Ecological succession/Secondary succession describes the events that take place on a hillside that has experienced a destructive mudslide. Ecological succession 4. Lack of iron in the photic zone
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Rachel Bohnenberger Professor Van Doorn ENVS 150-002 2 March 2015 Water Quality Lab Report Introduction: When people are asked about how water is characterized‚ they usually will think of saltwater‚ freshwater‚ safe-to-drink freshwater‚ and tap water. Only a few people understand that water and its quality are characterized in several other ways beyond salt‚ fresh‚ and tap water. In 1967‚ the Water Quality Act‚ which was an amendment of the Federal Water Pollution Control Act‚ was passed. The
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plasma K+ A- ClNa+ Cl+ K+ Na+ Cl- Na+ Na+ Gill epithelial cell Intestinal epithelial cells Cl- Cell membrane Anionic proteins (a) Ion concentration inside a single animal cell (b) Ion concentration across gill epithelium of a freshwater fish Blood capillary Intestinal lumen Glucose from meal Cross section of small intestine (c) Glucose transport across intestinal epithelium into the blood system MEMBRANE STRUCTURE Extracellular fluid Glycoproteins and -lipids
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