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 50
... established plants were joined by or replaced by other species to form more complex plant communities . His results influenced , in particular , Clements who presented over the next few decades theories held to be generally applicable ...
... established plants were joined by or replaced by other species to form more complex plant communities . His results influenced , in particular , Clements who presented over the next few decades theories held to be generally applicable ...
Page 118
... established and quickly multiply , spreading rapidly to points of damage on other trees . In New Zealand the Sirex wasp has done immense damage to plantations : whilst it will attack forests which have not been fired , a recent burn ...
... established and quickly multiply , spreading rapidly to points of damage on other trees . In New Zealand the Sirex wasp has done immense damage to plantations : whilst it will attack forests which have not been fired , a recent burn ...
Page 138
... established patterns of the native fauna . 3. Once firmly established , these pests are difficult to eradicate , especially as they often have no natural enemies in their new countries . With extensive new food supplies available their ...
... established patterns of the native fauna . 3. Once firmly established , these pests are difficult to eradicate , especially as they often have no natural enemies in their new countries . With extensive new food supplies available their ...
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