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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Common terms and phrases
acidic activities agricultural animals approach areas associated become birch Britain British brown cause changes chemical Class clay climatic complex cover crop cycle described detailed determine dominant early ecological ecosystem effect energy environment environmental established example exist factors field fire forest frequently further gley grass grazing ground growing growth horizon humus important increase influence insect land layer less limit loss material measure methods mountain native natural North nutrients oakwoods occur operate organic particularly pattern peat period pest pine plant podzol population present problem produce reach recent reference region relatively result seedlings similar slopes soil species spread stage stands structure succession surface Table tree tree-line types unit upland usually variations various vegetation whilst wood woodland zone
Bibliographic information
| Title | Basic Biogeography A Longman Text |
| Author | Nigel Pears |
| Edition | 3, illustrated, reprint |
| Publisher | Longman, 1977 |
| Original from | the University of Michigan |
| Digitized | 22 Aug 2011 |
| ISBN | 0582484014, 9780582484016 |
| Length | 272 pages |
| Export Citation | BiBTeX EndNote RefMan |