ECOSYSTEMS

covers the following topics;

7.1 ecosystems

7.3 sucession

7.4 nitrogen cycle

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Ecosystem
all the living and non-living components and how they interact within a habitat
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habitat
a place where an organism lives
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population
all the organisms of the SAME species, in the SAME habitat and the SAME time who can INTERBREED
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community
all the organism of DIFFERENT species, in the SAME habitat which INTERACT with each other
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biotic factors
factors caused by LIVING components
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abiotic factors
factors caused by NON-LIVING components
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niche
the role an organism plays in an ecosystem
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what might a niche of an organism entale
what they eat / how they feed / how they reproduce
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examples of biotic factors
predation / food / disease
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examples of abiotic factors
pH of soil / temperature / soil type
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producers
convert light energy into chemical energy to supply other organisms
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consumers
feed on another organism
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decomposer
feed on waste or dead material
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sucession
???
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primary sucession
??
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pioneer comunity
?
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climax community
?
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secondary sucession
1
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saprotrophic nutrition
nutrition gained by extracellular digstion - release enzymes and absorb the nutrients
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why do we need decomposers
nutrients are trapped in waste/dead material - it allows them to be recylced
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nitrogen fixation
the process by which atmospheric nitrogen is converted into ammonia or nitrate ions
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nitrogen fixation by three process...
haber process, lightning and nitrogen-fixing bacteria
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name of the nitrogen-fixing bacteria
Rhizobium
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where Rhizobium is found
root nodules of leguminous plants
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Haber process
industrial/artificial conversion of atmospheric nitrogen to ammonia
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respiration conditions of Rhizobium and how its maintains
anaerobic - maintained by leghaemoglobin
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realtionship between rhizobium and legumes
multalistic - rhizobium gains energy & legumes gain nitrates
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multalistic
the way in which two organism benefit each other
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ammonifaction
breakdown of dead or waste matter by decomposers to produce ammonium
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nitrification
ammonium --> nitrities --> nitrates
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chemoautotrophic bacteria
gains energy from oxidising inorganic compounds
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chemoautotrophic bacteria is involve in
nitrification
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chemoautotrophic bacteria works in what type of conditions
aerobic
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role of nitrosomonas
ammonia --> nitrites
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role of nitrobacter
nitrites --> nitrates
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condition for nitrosomonas
aerobic
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conditions for nitrobacter
aerobic
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denitrification
conversion of nitrates back into nitrogen
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conditions for nitrification
aerobic
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conditions for denitrification
anerobic
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Card 2

Front

habitat

Back

a place where an organism lives

Card 3

Front

population

Back

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Card 4

Front

community

Back

Preview of the front of card 4

Card 5

Front

biotic factors

Back

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