Presentation on theme: "EQ: How can we determine the safety and drinkability of our water supplies? LT: I can describe and analyze the methods of water filtration & water quality."— Presentation transcript:
EQ: How can we determine the safety and drinkability of our water supplies? LT: I can describe and analyze the methods of water filtration & water quality testing. LT: I will explain the Water Quality Tests. I will explain the importance of bioindicators in determining water quality.
Welcome! Warm Up 3/26/13 1.Define pH 2.What is the optimum level? 3.What are the different ways we can test pH? Go to goo.gl/vta7d1 to record your response
Review Water Quality Data: Open in Google Drive 39: Water Quality Data Analysis Activity
Just like we, humans, like to live in certain places so do other organisms Limnology is the study of fresh water environments to learn about water quality and study trends of human influence Our water quality indicators that deal with nonliving measurements are abiotic Biotic (living) are the bioindicators
Table of Contents 1 Title Assignment Water on Earth Notes11 River Basin Notes 12 River Basin Vocab13 River Basin Scavenger Hunt14 Estuaries Notes 15 Wetlands16 Diagram River Basin to Estuary17 Wetlands and Estuaries Vocab 18 Estuary Ecosystems 19 Ocean Food Webs20 Ocean Properties 21 Ocean Zones and Layers 22 Groundwater Notes and Soil Testing 23 Water Filtration Notes and Vocab 24 Water Quality Indicators (Handout)25 Water Quality Lab (Handout) 26 Bio-indicators 27
Bio-Indicators 27 Fresh Water Studies: Water Quality & Living Organisms
Bio-indicators: macroinvertebrates found living in water (they tend to remain in one place) that are sensitive to pollution. The range in size from dragonflies to crayfish
How do abiotic factors affect freshwater organisms? Temperature
How do abiotic factors affect freshwater organisms? Optimal Temperature Range OrganismTemp(°C) Trout5-20 Smallmouth Bass5-28 Caddisfly larvae10-25 Mosquito larvae10-25 Carp10-25 Catfish20-25 Temperature: Optimal range for Biodiversity is 5-25 ‘C.
How do abiotic factors affect freshwater organisms? Dissolved Oxygen
How do abiotic factors affect freshwater organisms? Dissolved Oxygen The higher the levels of D.O. the more diversity in organisms Minimum DO Requirements OrganismDO (mg/l) Trout6.5 Smallmouth Bass6.5 Caddisfly larvae4.0 Carp2.0 Catfish2.5 Mosquito larvae1.0
How do abiotic factors affect freshwater organisms? pH
How do abiotic factors affect freshwater organisms? pH: Optimal range for bio-indicators Is between 6.5-8.2 Effects of pH on aquatic life pH___________Effect__________________ 4.0-4.5 All fish, most frogs, insects absent 5.0-5.5 Bacteria die. Detritus accumulates, locking up essential nutrients. 6.5-8.2 Optimal for most organisms 11.0-11.5 Rapidly lethal to all species of fish
How do abiotic factors affect freshwater organisms? Total Dissolved Solids (TDS)
How do abiotic factors affect freshwater organisms? Total Dissolved Solids (TDS) Natural TDS come from rocks and soil from the watershed that drains into the stream, river, pond or lake. Changes in TDS can indicate a problem. If salts are high, dehydration occurs. Solids cause a laxative effect. Dissolved minerals can affect the pH, raising or lowering depending on the ions present. Range: 50-250 mg/l
How do abiotic factors affect freshwater organisms? Turbidity
How do abiotic factors affect freshwater organisms? Turbidity High turbidity decreases sunlight which decreases the rate of photosynthesis. Water that is highly turbid will warm faster, decreasing the dissolved oxygen available for respiration of all organisms.
Group A: Very sensitive to Environmental Stresses StonefliesMayfliesCaddisfliesDobsonfliesWater penny Group B: Somewhat sensitive to Environmental Stresses DragonfliesCranefliesDamselfliesCrayfishScuds Group C: Tolerant to Environmental Stresses Midges LeechesSnailsPouch SnailsBlackfly larva
Conclusion: Freshwater organisms-the Biotic part of the Freshwater environment- have “Limits” or “Optimal ranges” in water quality where they prefer to live. The quality of water can be determined by what and how many organisms are living in that environment. Macro invertebrates are used to evaluate the quality and history of the water environment.