Page of 1 10 Year 11 Biology Ecosystem Dynamics @ Penrith Lakes (Population Dynamics - includes depth study modelling) Key Inquiry Question: What effect can one species have on the other species in a community? Students: ● investigate and determine relationships between biotic and abiotic factors in an ecosystem, including: (ACSBL019) - the impact of abiotic factors (ACSBL021, ACSBL022, ACSBL025) - the impact of biotic factors, including predation, competition and symbiotic relationships (ACSBL024) - the ecological niches occupied by species (ACSBL023) - predicting consequences for populations in ecosystems due to predation, competition, symbiosis and disease (ACSBL019, ACSBL020) - measuring populations of organisms using sampling techniques (ACSBL003, ACSBL015) ● explain a recent extinction event (ACSBL024) ● investigate changes in past ecosystems that may inform our approach to the management of future ecosystems ●. investigate practices used to restore damaged ecosystems, Country or Place, e.g.: - mining sites - land degradation from agricultural practices Name ________________________ Inquiry Question: How healthy is the Ecosystem at Penrith Lakes?
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Page � of �1 10
Year 11 Biology Ecosystem Dynamics @ Penrith Lakes
(Population Dynamics - includes depth study modelling) Key Inquiry Question: What effect can one species have on the other species in a community? Students:● investigateanddeterminerelationshipsbetweenbioticandabioticfactorsinanecosystem,
4. Water Temperature Digital Thermometer - oC (Degrees Celsius)
5. Dissolved Oxygen - mg/l is the reading on DO meter.
Dissolved Oxygen Meter (Milligrams per Litre) mg/L mg/L
Use conversion chart to get % sat.Conversion Chart - Temp, mg/L and %
( % saturation )%
saturation%
saturation6. Conductivity or Total Dissolved Solids (Salts)
Total Dissolved Solids (TDS) Scan- ppm (Parts per million)
7. LightLight / Lux Meter - Lux
8. Slope Clinometer - Degrees (o)
9. Wind exposure (speed)Anemometer - kph
10. Water Depth General knowledge of lakes. 4m
11. Visual PollutionVisual Assessment. Use your eyes.
Circle the appropriate result:
LOW MEDIUM HIGH
12. Water Source Groundwater and run-off
STATION 2 Dipnetting - Invertebrate population sampling - (Results given in wrap up)
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STATION 3 Waterbird Observation
Waterbird Counts at 5 survey sites ( Teacher will help you fill this out)
Bird Species / Site No. 1 2 3 4 5* Abundance Distribution
1. Australian Grebe 12. Australian Wood Duck 3 4 6 123. Black Swan4. Blackwinged Stilt 25. Dusky Moorhen6..Eurasian Coot 47. Great Egret8. Little Black Cormorant9. Little Pied Cormorant 6 210 Pacific Black Duck 811.Pelican 1 112 Purple Swamphen 413. Royal Spoonbill14.White-faced Heron 115. Other:_______________
Total Abundance per Site 11 13 24Total Species per Site 3 5 4
1. On your walk - Look at the bird pictures. 2. Keep a tally of the number of birds sighted for each species. 3. Using column 5, fill in the bird numbers seen today. The teacher will guide you. Use this to work
out abundance/distribution and then a habitat/food supply point score.
Pelican Little Pied Cormorant
Little Black Cormorant
Australian Grebe
DIVERS
Eurasian Coot
Pacific Black Duck Dusky Moorhen
Australian Wood Duck
SWIMMERS
Black Swan
Great Egret
White-faced Heron
Purple Swamphen
WADERSRoyal Spoonbill
Black winged Stilt
Habitat total bird score?
0-10 Poor
11-18 Fair
19 - 25 Good
>25 Excellent
Tally :
Tally :
Tally :
Tally :
Tally :Tally :Tally :
Tally : Tally :
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Tally :
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Tally :
Bird SpeciesCircle
points for birds seen
today1. Grebe 42. Wood Duck 2
3. Black Swan 54. Stilt 5
5. Dusky Moorhen 36. Eurasian Coot 37. Great Egret 58. Black Cormorant 49. Pied Cormorant 4
Analysis of abiotic and biotic key relationshipsTurbidity,LightandDissolvedOxygen • The[inalbasinhaslowturbidity(abioticfactor).•Anhsunlight(abioticfactor)ghaquaticplants(bioticfactor)ghD.O.(abioticfactor)ghinvertebrates/aquaticlife(bioticfactor). Note:aminimumof60%D.Oisessentialforgillbreatherssuchasdragon[lynymphs.•Farmingpast:hturbiditygisunlightgiaquaticplantsgiD.O.giinvertebrates.
A Key Submerged Aquatic PlantSpecies-Ribbonweed •hsunlight+lowturbiditygRibbonweedhdissolvedoxygenghaquaticanimals.
• Long strands provide shelter for [ish andfoodforsnailsandotherinvertebrates.