Basic BiogeographyFirst published in 1985. Routledge is an imprint of Taylor & Francis, an informa company. |
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Page 26
SOCIABILITY CLASSES Class I. Plants growing in one place, singly. Class 2.
Plants grouped or tufted. Class 3. Plants in troops, small patches or cushions.
Class 4. Plants in small colonies, in extensive patches or forming carpets. Class 5
.
SOCIABILITY CLASSES Class I. Plants growing in one place, singly. Class 2.
Plants grouped or tufted. Class 3. Plants in troops, small patches or cushions.
Class 4. Plants in small colonies, in extensive patches or forming carpets. Class 5
.
Page 27
... same weight in frequency calculations as a whole cluster of individuals.
Frequency is commonly expressed as a limited number of frequency classes:
Class i, 1-20%; Class 2, 21-40%; Class i, 41-60%; Class 4, 61-80%; Class 5, 81-
100%.
... same weight in frequency calculations as a whole cluster of individuals.
Frequency is commonly expressed as a limited number of frequency classes:
Class i, 1-20%; Class 2, 21-40%; Class i, 41-60%; Class 4, 61-80%; Class 5, 81-
100%.
Page 29
Cover values are often arranged into a limited number of classes as follows:
Class X less than 1%; Class 1, 1-5%; Class 2, 6-25%; Class 3, 26-50%; Class 4,
51-75%; Class 5, 75-100%. Scales can be combined and in the example given ...
Cover values are often arranged into a limited number of classes as follows:
Class X less than 1%; Class 1, 1-5%; Class 2, 6-25%; Class 3, 26-50%; Class 4,
51-75%; Class 5, 75-100%. Scales can be combined and in the example given ...
Page 30
The following fidelity classes are described by Braun-Blanquet: Class L Strange
species, rare or accidental intruders from another community or relics of a
community that has previously occupied the same area. Class 2. Indifferent
species ...
The following fidelity classes are described by Braun-Blanquet: Class L Strange
species, rare or accidental intruders from another community or relics of a
community that has previously occupied the same area. Class 2. Indifferent
species ...
Page 40
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acid activities agricultural animals approach areas associated become Britain British brown cause cent changes chemical Class clay climatic complex conservation cover crop cycle detailed determined disturbance dominant early Ecol ecology ecosystem effects energy environment environmental established example exist factors field fire forest further grass grazing ground growing growth horizon humus important increase influence insect land layer lead less limit loss major material measure methods mountain natural North nutrients oakwood occur organic particularly pattern peat period pest pine plant population present problem processes production range reached recent reference region relatively seed shown similar slopes soil species spread stage stands structure succession surface Table temperature trees types unit upland usually values vegetation wind wood woodland zone
Bibliographic information
| Title | Basic Biogeography |
| Author | N V Pears |
| Edition | 2, reprint, revised |
| Publisher | Routledge, 2014 |
| ISBN | 1317885260, 9781317885269 |
| Length | 368 pages |
| Subjects | › › Science / Earth Sciences / Geography Social Science / Human Geography |
| Export Citation | BiBTeX EndNote RefMan |