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 55
... operates simply because it is the community which is best adapted to these new environmental conditions . This ... operate at some later stage then site conditions will change as a result . The habitat may no longer be suitable now ...
... operates simply because it is the community which is best adapted to these new environmental conditions . This ... operate at some later stage then site conditions will change as a result . The habitat may no longer be suitable now ...
Page 80
... operate between species to produce this stability . But this hypothesis has not yet been fully substantiated by ... operate in natural ecosystems but it is negative feedback mechanisms which attempt to remove disturbance . Population ...
... operate between species to produce this stability . But this hypothesis has not yet been fully substantiated by ... operate in natural ecosystems but it is negative feedback mechanisms which attempt to remove disturbance . Population ...
Page 81
... operate . The curve reaches a ' plateau ' and an approximate balance is achieved between the biotic potential and the environ- mental resistance . This settled population level is sometimes referred to as the carrying capacity of the ...
... operate . The curve reaches a ' plateau ' and an approximate balance is achieved between the biotic potential and the environ- mental resistance . This settled population level is sometimes referred to as the carrying capacity of the ...
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