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 67
... growing at any site . Walker concluded that the infill in most ponds was material brought in from outside , by erosion and run - off , and not deposited organic matter from the plants themselves . The climax for these sites appeared to ...
... growing at any site . Walker concluded that the infill in most ponds was material brought in from outside , by erosion and run - off , and not deposited organic matter from the plants themselves . The climax for these sites appeared to ...
Page 104
... grown in experimental gardens at these levels species which form the tree - line elsewhere , e.g. Picea engelmannii ... growing season at these altitudes does not permit needles to become fully mature . Wardle defines this ripening ...
... grown in experimental gardens at these levels species which form the tree - line elsewhere , e.g. Picea engelmannii ... growing season at these altitudes does not permit needles to become fully mature . Wardle defines this ripening ...
Page 106
... growing conditions of a valley site ( 700 m ) could withstand the test conditions of 15 ° C and 43 per cent relative humidity without showing signs of drought damage for twice as long as those poorly developed shoots which had grown ...
... growing conditions of a valley site ( 700 m ) could withstand the test conditions of 15 ° C and 43 per cent relative humidity without showing signs of drought damage for twice as long as those poorly developed shoots which had grown ...
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