aquatic ecosystems determined by the salinity of water determined by the salinity of water – 2...
TRANSCRIPT
![Page 1: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/1.jpg)
AQUATIC ECOSYSTEMS
• Determined by the salinity of water–2 types:• Freshwater : lakes, ponds, rivers,
streams, wetlands
•Marine: coastal marshes & swamps, coral reefs, oceans
![Page 2: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/2.jpg)
CHARACTERISTICS
• TEMPERATURE• SUNLIGHT*• OXYGEN• NUTRIENTS
Determines which organisms live where
*Photosynthetic organisms live near the surface
![Page 3: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/3.jpg)
Three types of organisms:based on location & adaptations
• Plankton– Phytonplankton– zooplankton
• Nekton
• Benthos
![Page 4: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/4.jpg)
Plankton – microscopic drifters
Phytoplankton: photosynthethicAlgae (base of food chain)
Zooplankton: heterotrophic microscopic organisms – jellyfish
![Page 5: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/5.jpg)
Nekton – free-swimming
![Page 6: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/6.jpg)
Benthos – bottom dwelling
![Page 7: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/7.jpg)
Decomposers
![Page 8: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/8.jpg)
7-1 Freshwater Ecosystems
![Page 9: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/9.jpg)
• These include rivers, streams, lakes, and ponds.
• Rivers and streams have moving water. The water may be moving fast or slow.
• Lake are usually larger and deeper than ponds.• Just like in the oceans, plants and animals live
in the shallow (less deep) parts. The sun shines more in the shallow parts.
![Page 11: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/11.jpg)
Lakes & Ponds
• Littoral zone: near shore– Nutrient rich– Diverse life– Plants rooted in mud, stems above water
![Page 12: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/12.jpg)
Littoral zone
![Page 13: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/13.jpg)
Lakes & Ponds
• Open water:– Further from shore– No rooted plants– Phytoplankton starts
food chain
![Page 14: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/14.jpg)
![Page 15: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/15.jpg)
Lakes & Ponds
• Deep Water:– No light– Bacteria &
decomposers live on dead things that drift down
– Fish adapted to cool water
![Page 16: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/16.jpg)
Lakes & Ponds
• Benthic Zone:– Bottom– Decomposers, insect larva, clams
![Page 17: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/17.jpg)
![Page 18: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/18.jpg)
![Page 19: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/19.jpg)
How nutrients affect lakes• Eutrophication= an
increase in the amount of nutrients in an aquatic ecosystem.
• Plants & algae grow• Bacteria feeding on
decaying plants grow• Bacteria use oxygen in
water• Reduced oxygen levels
kills fish • Run-off increase nutrients
![Page 20: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/20.jpg)
Freshwater WetlandsSwamps – woody plantsPoorly drained land,
Marshes – non-woody plants (cattails, grasses)
![Page 23: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/23.jpg)
![Page 24: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/24.jpg)
Function of Wetlands
• Trap & filter sediments, nutrients, pollutants• Reduce flooding• Buffer shoreline against erosion• Spawning grounds & habitat for fish &
shellfish• Provide habitat for rare, threatened,
endangered species• Recreation
![Page 25: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/25.jpg)
Human Impact
• Considered wasteland & breeders of disease carrying insects. Drained, cleared & developed.
• Now we recognize importance as water purifiers & flood prevention.
![Page 27: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/27.jpg)
% of Wetlands lost . 22 states have lost 50% of wetlands7 have lost 80% (Indiana, Ill, Miss, Ky, Iowa, Calif, Ohio
![Page 28: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/28.jpg)
Rivers
• Headwaters – origin may be snowmelt or rain• Full of oxygen, runs swiftly through shallow
riverbed• Becomes wider, warmer, slower, contains
more vegetation & less oxygen• Communities & industries affect health of
rivers.
![Page 29: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/29.jpg)
![Page 30: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/30.jpg)
Flint River
![Page 31: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/31.jpg)
Lake Lanier
![Page 32: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/32.jpg)
Atlanta’s drinking water
![Page 33: AQUATIC ECOSYSTEMS Determined by the salinity of water Determined by the salinity of water – 2 types: Freshwater : lakes, ponds, rivers, streams, wetlands](https://reader035.vdocuments.site/reader035/viewer/2022062314/56649da35503460f94a8ffdb/html5/thumbnails/33.jpg)
Characteristics of Aquatic Ecosystems