abiotic control of stream biota: physical, chemical, hydrological and spatial factors kevin kane...
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Abiotic Control of Stream Biota:Abiotic Control of Stream Biota:Physical, Chemical, Hydrological and Physical, Chemical, Hydrological and
Spatial FactorsSpatial Factors
Abiotic Control of Stream Biota:Abiotic Control of Stream Biota:Physical, Chemical, Hydrological and Physical, Chemical, Hydrological and
Spatial FactorsSpatial Factors
Kevin KaneKevin KaneKevin KaneKevin KaneAnimal Ecology 518, Stream EcologyAnimal Ecology 518, Stream Ecology
Dr. Clay PierceDr. Clay PierceAnimal Ecology 518, Stream EcologyAnimal Ecology 518, Stream Ecology
Dr. Clay PierceDr. Clay Pierce
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Topics of DiscussionTopics of Discussion
Describe physical, chemical, hydrological and spatial factors that influence the stream environment.
Illustrate these factors using the Wheeling Creek watershed project in West Virginia.
Illustrate the interdependence of these factors using GIS as a tool for rivers and watersheds in Iowa.
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Background:Background:
The WheelingThe WheelingCreek WatershedCreek Watershed
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Wheeling CreekWheeling CreekBackground InformationBackground Information
Wheeling Creek is a tributary of the Ohio River and drains a portion of northern West Virginia and the southwestern area of Pennsylvania.
Total drainage basin area is approximately 30,000 mi2, and consists of forested, agricultural, urban, and industrial landcover.
Wheeling Creek is typical of the upper Ohio River tributary streams.
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Wheeling Creek Location MapWheeling Creek Location Map
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Watershed Site MapWatershed Site Map
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Streams, Sites, and Sampling Streams, Sites, and Sampling Locations in the WatershedLocations in the Watershed
Sites A-F Wheeling Creek Watershed
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Topographic Map: Sites A-FTopographic Map: Sites A-F
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Site F: High Altitude PhotoSite F: High Altitude Photo
Lower Wheeling Creek Site F: 2.6 km upstream of the Ohio River at Tunnel Green area, Wheeling, WV.
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Site F: Topographic MapSite F: Topographic Map
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Site F: Low Altitude Aerial PhotoSite F: Low Altitude Aerial Photo
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Site F: Stream Level ViewSite F: Stream Level View
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Site of Wheeling Creek Wall in Site of Wheeling Creek Wall in 18901890
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Site of Wheeling Creek Wall in Site of Wheeling Creek Wall in 19961996
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Physical & Physical & HydrologicalHydrological Factors Factors
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Physical & Hydrological FactorsPhysical & Hydrological Factors
Stream Order Current / Discharge Substrate Temperature Human Factors
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Stream OrderStream Order
Stream order is a measure of the relative size of streams.
Stream sizes range from the smallest, first-order, to the largest, the twelfth-order (the Amazon River).
Over 80% of the total length of Earth's rivers and streams are headwater streams (first- and second-order).
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Stream OrderStream Order
Streams gradually increase their widthand depth as theygo from 1st orderto nth order.
Water discharge also increases asorder increases.
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Topography and Stream OrderTopography and Stream Order
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Comparison of 3rd and 4th Order Comparison of 3rd and 4th Order Stream WatershedsStream Watersheds
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Comparison of 3rd and 5th Order Comparison of 3rd and 5th Order Stream WatershedsStream Watersheds
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1st Order Stream1st Order Stream
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2nd Order Stream2nd Order Stream
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3rd Order Stream3rd Order Stream
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4th Order Stream4th Order Stream
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5th Order Stream5th Order Stream
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6th Order 6th Order StreamStream
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Hydrology and Hydrology and Stream OrderStream Order
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Current / DischargeCurrent / Discharge
Water velocity and associated forces are huge factors affecting organisms of running waters food delivery every day physical forces in-stream ecological distributions behavioral adaptations
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Effects of flow on aquatic organisms Flow environments
channel nearbed pools
Boundary layers friction between moving fluid and a
stationary surface organisms attaching to surfaces
Current / DischargeCurrent / Discharge
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Hydrology and Body ShapeHydrology and Body Shape
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SubstrateSubstrate
Bottom, sides, and projecting into streams Mineral Substrate
Current and parent material geology soils
Organic Substrates minute organic fragments fallen trees rooted plants other animals
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Limestone BedLimestone Bed
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SubstrateSubstrate
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Substrate and BiologySubstrate and Biology
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TemperatureTemperature
Natural Influences climatic zone altitude air temp season streamside vegetation water depth flow rate snow melt groundwater mixing
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TemperatureTemperature
Human Activity (Thermal Pollution) coolant discharge storm water (roofs, pavement) removal of streamside vegetation lancover changes
agricultural practices construction recreation erosion (suspended solids)
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Temperature / ChemicalTemperature / ChemicalInteractionInteraction
Chemical processes involved in metabolism growth reproduction behavior
Sensitivity (thermal stress and shock) of organisms to toxic wastes parasites diseases
Dissolved Oxygen Warmer temps decrease the ability of water
to hold oxygen molecules
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TemperatureTemperature
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Temperature and BiologyTemperature and Biology
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Human FactorsHuman Factors
Landcover / Landuse Change
Sewage
Pollution
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Human FactorsHuman Factors
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Landcover Landcover vs.vs.Diversity Diversity
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SewageSewage
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PollutionPollution
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Weather and BiologyWeather and Biology
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Physical Data Physical Data
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Chemical Factors
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Water ChemistryWater Chemistry
Many factors influence the composition of river water
There is much spatial variation of stream water chemistry
The ultimate source of all the constituents of stream water originate from dissolution of the earth’s rocks
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Water ChemistryWater Chemistry
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Chemical FactorsChemical Factors
pH Alkalinity Conductivity Hardness Dissolved Gasses (oxygen, carbon
dioxide, and nitrogen)
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Chemical SettlingChemical Settling
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pHpH The concentration of hydrogen ions in
the solution (acidity and alkalinity) Every unit change in pH represents a
ten fold change in acidity
Factors in pH of Natural Water bedrock and soil type vegetation type nature and discharge of pollutants concentration of carbonates and carbon
dioxide high concent. produce alkaline water (hi pH) low concent. produce acidic waters (low pH)
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pHpHNormal surface waters
range from 5.5 - 8.5
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pHpH
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Chemical reactions within streams can cause a weak buffer
Buffering is the ability of water to resist a change in its pH
As acidity increases, the buffering capacity is consumed
AlkalinityAlkalinityBuffering Action of StreamsBuffering Action of Streams
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Water HardnessWater Hardness
Total concentration of cations calcium magnesium iron manganese
A reflection of the watershed geology and also human activity in the watershed
Important in the formation of cell material in aquatic plants and animals
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ConductivityConductivity
The ability of an aqueous solution to carry an electrical current through the movement of ions
Indicator for dissolved chemicals in water
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Dissolved OxygenDissolved Oxygen
Two main sources in stream water atmosphere
waves and tumbling water mix air into water where oxygen readily dissolves until saturation occurs
photosynthesis oxygen is introduced by aquatic plants
and algae as a byproduct of photosynthesis
Dissolved oxygen decreases with rise in temperature
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Dissolved OxygenDissolved Oxygen
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Dissolved OxygenDissolved Oxygen
Essential for fish, invertebrate, plant, and aerobic bacteria respiration 5-6 ppm - normal fish growth activity 3 ppm - stressful to most aquatic
organisms <1-2 ppm will not support fish
Oxygen deficiency factor examples aquatic organism consumption sewage urban and ag runoff industrial discharge
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Leaf LitterLeaf Litter
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Stream ChemistStream Chemist
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Chemical DataChemical Data
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SpatialSpatial Factors Factors
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Spatial FactorsSpatial Factors
Spatial scale and spatial distribution of physical and chemical factors influence an individual stream dramatically.
The interdependence of these factors and their analysis can predict a given stream environment.
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Spatial FactorsSpatial Factors
Geology Soils Landcover Human activities
landfills industrial areas cities agricultural uses
Maps and GIS - Spatial monitoring and Analysis
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Spatial FactorsSpatial Factors
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Typical Landcover in WatershedTypical Landcover in Watershed
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Geology and BiologyGeology and Biology
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Remote Sensing DataRemote Sensing Data
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Site Topographic MapSite Topographic Map
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Site A: High Altitude PhotoSite A: High Altitude Photo
Lower Wheeling Creek Site A: 12.0 Kilometers upstream of the Ohio River at Elm Grove, W.V.
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Site A: Topographic MapSite A: Topographic Map
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Site A: Low Altitude Aerial PhotoSite A: Low Altitude Aerial Photo
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Site A: Stream Level ViewSite A: Stream Level View
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Scene on Big Wheeling Creek in Scene on Big Wheeling Creek in 19041904
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Sampling SitesSampling Sites
Water quality sampling sites are representative of various sized streams from north to south and east to west.
This allows comparison of water quality at one site with the water quality at other sites within the watershed.
This is a “watershed approach”, which means that it is important to view water quality at any one site within the context of water quality in the overall watershed.
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Streams, Sites, and Sampling Streams, Sites, and Sampling Locations in the WatershedLocations in the Watershed
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Sampling LocationsSampling Locations
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Physical Data From Sampling Physical Data From Sampling LocationsLocations
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Chemical Data From Sampling Chemical Data From Sampling LocationsLocations
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Biological Data From Sampling Biological Data From Sampling LocationsLocations
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Biological Data From Sampling Biological Data From Sampling LocationsLocations
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Spatial Factors and BiologySpatial Factors and Biology
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Affect on Stream Biota
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Volunteer Monitoring GroupVolunteer Monitoring Group
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StoneflyStonefly
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BiomonitoringBiomonitoring
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MolluskMollusk
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Biological DataBiological Data
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River Continuum ConceptRiver Continuum Concept
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Interdependence of Interdependence of Abiotic Factors:Abiotic Factors:
Using GIS As a Tool for Using GIS As a Tool for Streams and Watershed Streams and Watershed
Analysis in IowaAnalysis in Iowa.
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Iowa’s Native LandscapeIowa’s Native Landscape
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Surveying CrewSurveying Crew
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Iowa’s PrairieIowa’s Prairie
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Prairie StreamPrairie Stream
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Plowing the PrairiePlowing the Prairie
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Tiling the Prairie for AgricultureTiling the Prairie for Agriculture
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Tiling the Prairie for AgricultureTiling the Prairie for Agriculture
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Straightening a Prairie StreamStraightening a Prairie Stream
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Abiotic Factors:Abiotic Factors:Visualization and AnalysisVisualization and Analysis
in a GISin a GIS
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SummarySummary
Stream environment is very dependent on the physical and chemical factors of the watershed.
A specific stream environment is very dependent upon the spatial distribution of these factors in the watershed.
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References References
Allan, J.D. 1995. Stream Ecology -- Structure and Function of Running Waters. Chapman and Hall, UK.
Andersen, K., et al. 1997. Historical Land Use and Surface Hydrology Alterations in Iowa Agricultural Watersheds. ISU Dept. of Animal Ecology, Ames.
Roth,N.E., J.D. Allan, and D.L. Erickson, 1996, Landscape influences on stream biotic integrity assessed at multiple spatial scales. Landscape Ecology 11: 141-156.
Myers, Robert. 1998. NASA Classroom of the Future: Exploring the Environment - Water Quality. Wheeling, WV. http://www.cotf.edu/ete/main.html
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References (cont.) References (cont.)
Anderson P. F. 1997. GIS Research to Digitize Maps of Iowa 1832-1859 Vegetation from General Land Office Township Plat Maps. Iowa Department of Natural Resources.
Iowa Department of Natural Resources. 1998. Natural Resources Geographic Information System Library. Iowa DNR, Des Moines.
Photo Credits NASA Classroom of the Future : Exploring the
Environment - Water Quality. Wheeling, WV. http://www.cotf.edu/ete/main.html
Andersen, Kathy. ISU Dept. of Animal Ecology Arbuckle, Kelly. ISU Dept. of Animal Ecology