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 111
... native to the British Isles , grows significantly faster under windy conditions than the native Scots pine ( as results from a Forestry Commission experimental plot at 490 m in the Cairngorms have shown : over the same period the Scots ...
... native to the British Isles , grows significantly faster under windy conditions than the native Scots pine ( as results from a Forestry Commission experimental plot at 490 m in the Cairngorms have shown : over the same period the Scots ...
Page 131
... native animal groups ; ( b ) introducing new ( or alien or exotic ) species of plants and animals ; ( c ) altering one or more environmental factors ; or ( d ) adding ' foreign ' substances to the ecosystem as pollutants or pesticides ...
... native animal groups ; ( b ) introducing new ( or alien or exotic ) species of plants and animals ; ( c ) altering one or more environmental factors ; or ( d ) adding ' foreign ' substances to the ecosystem as pollutants or pesticides ...
Page 143
... native varieties ( up to 600 in Indonesia , according to Smith ) . About 90 per cent of the United States corn crop in 1970 was based on the same genetically constituted varieties . This is what made outbreaks of the southern corn ...
... native varieties ( up to 600 in Indonesia , according to Smith ) . About 90 per cent of the United States corn crop in 1970 was based on the same genetically constituted varieties . This is what made outbreaks of the southern corn ...
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