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 178
... nutrients is obviously that contained in the soil . Of those taken up by the root system some will be retained in the tree in the form of new tissues , i.e. the tree increment . But large quantities are released again , returning to the ...
... nutrients is obviously that contained in the soil . Of those taken up by the root system some will be retained in the tree in the form of new tissues , i.e. the tree increment . But large quantities are released again , returning to the ...
Page 182
... nutrients , then the uptake of nutrients to balance losses through leaf - fall ( whether caused by defoliators or by natural autumnal fall ) may be insufficient and reserves in the plant are soon exhausted . At these particular sites ...
... nutrients , then the uptake of nutrients to balance losses through leaf - fall ( whether caused by defoliators or by natural autumnal fall ) may be insufficient and reserves in the plant are soon exhausted . At these particular sites ...
Page 198
... nutrients for herbivores is found in heather about 7 years old . The food value of heather also varies with the underlying geology and it has been demonstrated by Picozzi that moors developed on granite soils carry smaller populations ...
... nutrients for herbivores is found in heather about 7 years old . The food value of heather also varies with the underlying geology and it has been demonstrated by Picozzi that moors developed on granite soils carry smaller populations ...
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