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 12
... sampling size 4 8 16 32 64 128 256 Quadrat size ( m2 ) Fig . 2.1 A species - area curve for determining the minimum size ( minimal area ) of a representative sample from the plant community . The minimal area determined is an ...
... sampling size 4 8 16 32 64 128 256 Quadrat size ( m2 ) Fig . 2.1 A species - area curve for determining the minimum size ( minimal area ) of a representative sample from the plant community . The minimal area determined is an ...
Page 29
... sample . Despite these huge numbers , the microflora and microfauna seldom contribute more than 2-3 per cent of the total organic material in a soil sample . Earthworms , mites , spiders , etc. , although usually clearly visible , exist ...
... sample . Despite these huge numbers , the microflora and microfauna seldom contribute more than 2-3 per cent of the total organic material in a soil sample . Earthworms , mites , spiders , etc. , although usually clearly visible , exist ...
Page 34
... sample are set out below , providing some insight into how the pedologist adds more precise detail to his carefully ... sample and proceeds by the following stages : ( a ) First remove all coarse stones from sample which is then oven ...
... sample are set out below , providing some insight into how the pedologist adds more precise detail to his carefully ... sample and proceeds by the following stages : ( a ) First remove all coarse stones from sample which is then oven ...
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