Basic BiogeographyBasic considerations. Introduction. Inital approaches to vegetation study. Inital approaches to soil study. Plant dynamics and the nature of vegetation. Ecosystems. Ecological factors and environmental variations. distubed ecosystems. Selected examples from the British Isles. The vegetation. The soils. The impact of man. |
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Page 22
B.(1) Density When the exact number of individuals of a species is determined for
a unit area (the quadrat) then we are dealing with density, a truly quantitative
measure. Density determinations can be very time-consuming, especially when ...
B.(1) Density When the exact number of individuals of a species is determined for
a unit area (the quadrat) then we are dealing with density, a truly quantitative
measure. Density determinations can be very time-consuming, especially when ...
Page 25
So far we have been describing a few measures we can apply to the species
found in a single quadrat or stand. In applying these measures we are engaged
in what ecologists call analytical phytosociology. When we have analysed a
number ...
So far we have been describing a few measures we can apply to the species
found in a single quadrat or stand. In applying these measures we are engaged
in what ecologists call analytical phytosociology. When we have analysed a
number ...
Page 255
A major problem in the economic approach is, of course, the measurement of
intangible benefits in the equation. Some are more difficult to evaluate than
others, whilst a few may well be impossible to assess precisely. How, for example
, does ...
A major problem in the economic approach is, of course, the measurement of
intangible benefits in the equation. Some are more difficult to evaluate than
others, whilst a few may well be impossible to assess precisely. How, for example
, does ...
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Contents
Introduction | 3 |
Initial approaches to vegetation study | 11 |
Initial approaches to soil study | 28 |
Copyright | |
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