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Title: F215 Ecosystems
Description: Simple but detailed notes, directly answering criteria on the specification for Ecosystems. Although, the OCR Biology spec has changed some topics may well be the same/similar. Please preview before purchase if interested.
Description: Simple but detailed notes, directly answering criteria on the specification for Ecosystems. Although, the OCR Biology spec has changed some topics may well be the same/similar. Please preview before purchase if interested.
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Tanisha Patel
Ecosystems
(a) define the term ecosystem;
Nonliving things and living organisms occurring in an area and the relationships between
them
(b) state that
ecosystems are dynamic systems
...
● Shown in a food web, arrows representing the flow of energy between organisms
...
The energy content of samples of organisms from each trophic level is measured
2
...
The samples are weighed
4
...
The energy produced passes to a known mass of water and the temperature rise of
the water is measured
6
...
Dry sand is blown inland, it is trapped by debris
2
...
3
...
Dune grows into foredunes they begin yellow but darken as humus (soil nutrients) is
increased as plants die and decay
...
Colonisation continues and develops grey dunes
6
...
They change the microclimate to allow flowering plants red fescue grass and
creeping willow
8
...
This area is more suitable for some plant life with its high acidity, humusrich
and water
...
Belt transects
Quadrats placed sequentially along line transect
...
Each species present identified, and abundance
of each is estimated
Point quadrats
Frames with long pins
...
Each species which touches a pin is
recorded, along with number of times it is touched
...
They recycle materials such as Carbon and Nitrogen
...
(l) describe how microorganisms recycle nitrogen within ecosystems
Title: F215 Ecosystems
Description: Simple but detailed notes, directly answering criteria on the specification for Ecosystems. Although, the OCR Biology spec has changed some topics may well be the same/similar. Please preview before purchase if interested.
Description: Simple but detailed notes, directly answering criteria on the specification for Ecosystems. Although, the OCR Biology spec has changed some topics may well be the same/similar. Please preview before purchase if interested.