Summary
Summary Nutrient cycles revision notes/mind map
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- AQA
Detailed and concise a level biology revision notes on nutrient cycles.
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Energy enters anecosystem as Nutrients have limited availability produces =
photosynthetic
and lost heat usable form elements such organisms that manufacture
sunlight is as in i.
which can't be recycled as carbon , phosphorus and nitrogen organic substances using
flow
-
of energy linear
-
-
are recycled light
Nutrient cycles basic sequence
:
tenants organisms
-
-
that
nutrients taken by producers lplasb ) obtain their by
up as simple inorganic molecules energy
•
•
produces incorporate nutrients into complex organic molecules feeding on other
organisms
and
• when the
producer is eaten the nutrient passes into consumes then
s-a-pr-ob-io-nk-decompoge.gg ,
along the food chain which break down bacteria
•
when producers and consumers die their complex molecules are broken materials in dead organisms
down by saprobionb releasing the nutrient to its original simple form to simple ones
releasing
3.5.4 Nutrient by des them to be absorbed
PHOSPHORUS CYCLE MYCORRHIZAÉ
Phosphorus is a
component of ATP , phospholipids and Associations between fungi and roots
nucleic acids mainly found mineral form Poi Fungi act like extensions of the plants
-
in as
,
in
sedimentary rock deposits these after orig
ante in the root
system increasing total surface area
sea but we
brought to the surface by geological Per the absorption of water and minds ,
uplifting weathering / helps POP dissolve to be the mycorrhizal then holds the water
-
erosion
,
available for absorption and minerals in the neighbourhood of
On the death of plants / animals decomposes break
,
the roots enabling the plants to better
them down releasing them again into water /soil ,
resist drought and take up inorganic
however , some ions remain in
parts of animals such ions more readily
as bones or shells Example of a mutualistic relationship :
which are slow to plant benefits from improved uptake of
break down water and ions whilst the
inorganic
POI carbohydrates /sagas and
-
ions in excreta fungi relieves
released by decomposition anmoauidsfromtheplant
dissolve into lakes /oceans NITROGEN CYCLE →
forming sedimentary rocks
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