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 38
... influence the acidity value . A small amount of soil indicator solution is added and the tube is vigorously shaken ... influence chemical processes important for plant nutrition . Increased acidity can directly reduce the availability of ...
... influence the acidity value . A small amount of soil indicator solution is added and the tube is vigorously shaken ... influence chemical processes important for plant nutrition . Increased acidity can directly reduce the availability of ...
Page 94
... influence , maybe decisive , on the presence , absence or performance of a species . This very broad definition reflects the fact that there may be almost countless influences at work on a biotic community : the impact of each factor ...
... influence , maybe decisive , on the presence , absence or performance of a species . This very broad definition reflects the fact that there may be almost countless influences at work on a biotic community : the impact of each factor ...
Page 229
... influence on microclimate and microbe activity . It contributes the bulk of the humus material and plays a large role in determining the hydrological regime of the profile through its influence on run - off and infiltration rates . On ...
... influence on microclimate and microbe activity . It contributes the bulk of the humus material and plays a large role in determining the hydrological regime of the profile through its influence on run - off and infiltration rates . On ...
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