Limnology powerpoint presentation
Download as PPTX, PDF7 likes15,928 views
The document introduces limnology as the study of inland waters, including their physical, biological, and chemical aspects. It notes there are three main branches: physical limnology covers properties like water movement and basin geology. Biological limnology focuses on photosynthesis and productivity. Chemical limnology examines inorganic and organic compounds. The document provides examples of limnology studies on lakes, noting their formation, depth, residence time, zones, and trophic classification. It outlines the importance of limnology for conservation and understanding impacts of changes to watersheds.
Limnology powerpoint presentation
- 2. Presented By Nusrat Jahan (MUH1819039F) Arnima Aich (BKH1819014F) Shatabdi Dhar Bithi (BKH1819019F) Shahadat Hossain (ASH1819043M)
- 4. Introducing To Limnology • Limnology is the study of inland waters and their many aspects • It covers all inland waters, which may be lakes, rivers and streams but also reservoirs, groundwater and wetlands.
- 5. Branches of Limnology There are three Branches of Limnology 1.Physical limnology 2.Biological limnology 3.chemical limnology
- 6. Physical Limnology Unique properties of water-important role in penetration, distribution of light, heat. Water movements( waves, currents) Geology of basin(origin, morphology, leaching, minerals).
- 7. Biological Limnology Base is photosynthesis-primary productivity. Regulated by and may regulate,physical and chemical factors
- 8. Chemical Limnology Inorganic,Organic compounds Closely allied to geology(leaching) Distribution often related to water movements
- 9. Example of Limnology We can describe lake.There are three types of Lake. 1. Glaciated lake 2. Reservoirs 3. Oxbows. The lake differs from 2 sides 1. Depth 2. Residence Time
- 10. Formation of Lakes Most natural Midwestern lakes were formed by glaciers>10000 years ago Glaciers scoured out lake basins Ice Blocks formed depression that filled and became lakes(kettle or ice block lakes)
- 11. Chemical Aspect The importance of chemical factors, is owing to their lethal and sublethal effects on cultural organisms, and also owing to their effect on biological productivity. productivity of the organism in the food chain. This aspect is discussed separately under '' Biological Productivity ‘’.
- 12. Nutrition Aspect Of Limnology Nutrients are redistributed from the upper water to the lake bottom as the dead plankton gradually sink to lower depths and decompose. In contrast to DO, essential nutrients such as the bioavailable forms of phosphorus and nitrogen (dissolved phosphate, nitrate and ammonium)
- 14. Producers : producers is primary productivity of lakes.the major threat to lakes involves the excessive growth of primary producers due to nutrient inputs caused by poor landuse management consumer: the best known group of aquatic consumers is fish.tertiary consumers that prey on the smaller fish include larger fish and other carnivorous animals(loons,grebes,herons and otters) Decomposer : Decomposers are organisms such as bacteria and fungi that break down the organic matter in the dead bodies of plants. Decomposers are hetetrophic, meaning that they use organic subtrates to get their energy, carbon and nutrients for growth and development
- 15. Lake Zone A typical lake has three distinct from zones. 1. Limetice 2. Littoral 3. Benthic This zones are usally determind by depth and distinct from the shoreline
- 17. Importance Of Limnology Cconversation from manmade lentic reservoirs to natural lotic rivers Dam removal completely alters watershed biogeochemical processes. Large- scale distributance that results in variety of ecosystem impacts.