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 86
... agricultural crop ecosystem , will concentrate his attention on one species , or at most a few , to the exclusion of the other species present . With modern agricultural methods , there is a ruthless elimination of all plant and animal ...
... agricultural crop ecosystem , will concentrate his attention on one species , or at most a few , to the exclusion of the other species present . With modern agricultural methods , there is a ruthless elimination of all plant and animal ...
Page 144
... agricultural practices . In the early days of agriculture , some 10,000 years ago , Huffaker's triumvirate in insect containment operated ( see page 143 ) . The first cultivated crop strains were similar to types existing in the wild ...
... agricultural practices . In the early days of agriculture , some 10,000 years ago , Huffaker's triumvirate in insect containment operated ( see page 143 ) . The first cultivated crop strains were similar to types existing in the wild ...
Page 249
... agricultural activities associated with the tourist industry . Government policy ( e.g. guaranteed prices or the addition or removal of subsidies ) , now of course influenced by EEC decisions , may well tip the economic balance of ...
... agricultural activities associated with the tourist industry . Government policy ( e.g. guaranteed prices or the addition or removal of subsidies ) , now of course influenced by EEC decisions , may well tip the economic balance of ...
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