Basic Biogeography |
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Page 5
Nigel Pears. the plant cover , such as wood products , fibres and drugs . It is therefore essential to know how the various types of plant cover originate , what relationships exist within the vegetation , what changes are taking place ...
Nigel Pears. the plant cover , such as wood products , fibres and drugs . It is therefore essential to know how the various types of plant cover originate , what relationships exist within the vegetation , what changes are taking place ...
Page 23
... covered when the aerial parts of each plant are projected perpendicularly down on to it . Cover values are expressed as percentages of the total area of the sampling unit . Because plants frequently overlap , the total percentage cover ...
... covered when the aerial parts of each plant are projected perpendicularly down on to it . Cover values are expressed as percentages of the total area of the sampling unit . Because plants frequently overlap , the total percentage cover ...
Page 229
... plant cover has the key role of preventing soil loss through erosion . And , in the extreme case with peats , the vegetation is essentially the soil . The vegetation is of fundamental importance for humification processes and humus ...
... plant cover has the key role of preventing soil loss through erosion . And , in the extreme case with peats , the vegetation is essentially the soil . The vegetation is of fundamental importance for humification processes and humus ...
Contents
Introduction | 3 |
Initial approaches to vegetation study | 11 |
Initial approaches to soil study | 28 |
Copyright | |
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acidic agricultural animals approach areas become biogeography biotic birch Britain British Isles brown earths Cairngorm Cairngorm Mountains Calluna changes chemical clay climatic climax community climax vegetation complex conservation coypus crop cycle deciduous deer dominant Ecol ecologists ecosystem energy environment environmental erosion example fire forest Forestry Forestry Commission gley soils grass grazing ground flora growth heather herbivores horizon humus important increase influence insect land landscape layer leached lichen litter methods mineral moorland moors mountain native natural nutrients oakwoods occur organic parent material pattern peat pedogenic pest pine pinewood Pinus plagioclimax plant communities plant cover podzol pollen population present produce quadrat Quercus recent regeneration region sample Scotland Scots pine Scottish Highlands seedlings shrubs slopes soil types stage structure surface Table temperature timber-line tree-line upland usually variations vegetation whilst wood woodland zone