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 20
... produced close to the soil . 3. Hemicryptophytes ( H ) - buds are half buried in the top soil layer or humus . 4. Geophytes ( G ) – buds lie entirely in the soil , protected from cold or dry air . - 5. Therophytes ( Th ) annuals which ...
... produced close to the soil . 3. Hemicryptophytes ( H ) - buds are half buried in the top soil layer or humus . 4. Geophytes ( G ) – buds lie entirely in the soil , protected from cold or dry air . - 5. Therophytes ( Th ) annuals which ...
Page 121
... produce vast quantities of seed each year but little regeneration of the trees takes place . This is because litter accumulates to such a depth on the soil surface , perhaps up to 0.5 m of conifer needles . Any seeds deposited here are ...
... produce vast quantities of seed each year but little regeneration of the trees takes place . This is because litter accumulates to such a depth on the soil surface , perhaps up to 0.5 m of conifer needles . Any seeds deposited here are ...
Page 180
... producing ' lammas shoots ' after defoliation ( as in Wistman's Wood ) , the tree can build up food reserves again and ... produce a ' browse line ' in woodlands , clearly showing the level to which they can reach for leaves . Other ...
... producing ' lammas shoots ' after defoliation ( as in Wistman's Wood ) , the tree can build up food reserves again and ... produce a ' browse line ' in woodlands , clearly showing the level to which they can reach for leaves . Other ...
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 birch Britain British Isles brown earths Cairngorm Cairngorm Mountains Calluna changes chemical clay climatic climax community climax vegetation complex 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 Highlands 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 spread stage structure surface Table temperature timber-line tree-line upland usually variations vegetation whilst wood woodland zone