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22664700
QCAA BIOLOGY U3T1 CH1
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QCAA Biology Unit 3 Topic one CHAPTER 1
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qcaa
queensland syllabus
biology
qcaa biology
biology
unit 3 topic 1 - describing biodiversity
higher school certificate
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Michaela Radford
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Michaela Radford
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QCAA BIOLOGY U3T1 CH1
1.1 The diversity of species and ecosystems
Variety of life is known as biodiversity.
living (biotic) and non living organisms (abiotic)
energy transferred through photosynthesis and linked through food webs.
Final transformation known as body heat
1.2 Determining diversity
species richness
the number of species present in an ecosystem
Relative species abundance
How many species are present
% cover
percentage of quadrat that species is occupying.
% frequency
proportion of quadrats that contained a particular species
SDI
a number between 0 and 1 determining diversity. 1 = infinite diversity.
1.3 comparing ecosystems
Spacial scale
Macro level - country/continent. BIG
Meso-level - names area/location
Micro level - individual biome
Species interaction
Predation
competition
Niche - a specialised position/role
1.4 Environmental limiting factors
limiting - restricts an organism's ability to live there
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