Basic Biogeography |
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Page 12
... quadrat becomes the y - axis . When the entries are plotted they invariably form a curve of the type shown in Fig . 2.1 . The point where the curve flattens out marks the quadrat size beyond which further sampling would yield at best ...
... quadrat becomes the y - axis . When the entries are plotted they invariably form a curve of the type shown in Fig . 2.1 . The point where the curve flattens out marks the quadrat size beyond which further sampling would yield at best ...
Page 22
... quadrats and Calluna vulgaris ( common heather ) occurs in every quadrat then the frequency is 100 per cent . Similarly , Erica tetralix occurring in only 10 quadrats would have a frequency of 20 per cent . It does not matter how many ...
... quadrats and Calluna vulgaris ( common heather ) occurs in every quadrat then the frequency is 100 per cent . Similarly , Erica tetralix occurring in only 10 quadrats would have a frequency of 20 per cent . It does not matter how many ...
Page 23
... quadrat size in each case . The only variable is the arrangement of the species ( i.e. the pattern ) in the vegetation , from regular to random . Frequency values vary as indicated . Frequency values would also alter if the quadrat size ...
... quadrat size in each case . The only variable is the arrangement of the species ( i.e. the pattern ) in the vegetation , from regular to random . Frequency values vary as indicated . Frequency values would also alter if the quadrat size ...
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 biotic birch Britain British Isles brown earths Cairngorm Cairngorm Mountains Calluna changes chemical clay climatic climax community climax vegetation complex conservation 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 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 stage structure surface Table temperature timber-line tree-line upland usually variations vegetation whilst wood woodland zone