Download - LIM-13-7a-Ek Sg & Danau.ppt
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
1/12
Freshwater L i fe Zones
Salt concentration of less than 1%
Standing bodies (lakes, ponds, inlandwetlands)
Flowing bodies (streams and rivers)
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
2/12
Rain and snow
Water
Sediment
LakeGlacier
RapidsWaterfall
Tributary Flood plain
Oxbow lake
Salt marsh
Delta
Ocean
DepositedsedimentSource Zone
Transition Zone
Floodplain Zone
Major
Character ist ics o f Freshwater
Streams and Rivers
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
3/12
Water f low s downh i ll
Surface water
Runoff
Watershed
Drainage basin
River basin
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
4/12
Types of organisms
Phytoplankton cyanobacteria and algae
Zooplankton primary and secondary consumers
Nekton Swimming consumers (fish, turtles, and whales)
Benthos bottom dwellers
Barnacles and oysters Worms Lobsters and crabs
Decomposers bacteria
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
5/12
Food
Drinking water
Irrigation water
Hydroelectricity
Transportation
corridors
Recreation
Employment
Climate moderation
Nutrient cycling
Waste treatment
Flood control
Groundwater
recharge
Habitats for many
species
Genetic resources
and biodiversity
Scientific
information
Economic
Services
Freshwater Systems
Ecological
Services
Natural Capital
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
6/12
Factors Limiting Life in AquaticLife Zones
1) Temperature2) Access to sunlight
Euphotic zone3) Dissolved oxygen
5 ppm
4) Available nutrients Shallow water upwelling
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
7/12
L i fe Zones Found in Freshwater
Littoral zoneconsists of shallow waternear the shore to the depth at whichrooted plants quite growing.
Limnetic zone
the open sunlite watersurface away from the shore. The mainphotosynthetic body of the lake.
Profundal zone
deep, open water, toodark for photosynthesis.
Benthic zoneat the bottom of the lake.
Cool temperatures and low oxygen levels.
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
8/12
Sunlight
Painted
turtleGreen
frog
Pond
snail
Blue-winged
teal
Muskrat
Plankton
Northern
pike
BloodwormsYellow
perch
Diving
beetle
Littoral zone
Limnetic zone
Profundal zone
Benthic zone
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
9/12
Seasonal Changes in Lakes
Epilimnion
Thermocline
Hypolimnion
Fall overturn
Spring
overturn Fig . 7-22 p. 159
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
10/12
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
11/12
Effec ts o f Plan t Nutr ien ts on
Lakes:
Too Much of a Good Thing
Cultural eutroph icat ion:
Human inputs of nutrients from the
atmosphere and urban and agricultural areas
can accelerate the eutrophication process.
-
8/10/2019 LIM-13-7a-Ek Sg & Danau.ppt
12/12