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 138
... pest outbreak are appreciated , precautions are normally taken in areas adjacent to the pest's present distribution to prevent it from spreading in that direction . These quarantine measures attempt to control the inflow by checking the ...
... pest outbreak are appreciated , precautions are normally taken in areas adjacent to the pest's present distribution to prevent it from spreading in that direction . These quarantine measures attempt to control the inflow by checking the ...
Page 143
... pest management . Evidence suggests benefits would arise from reintroducing diversity to our agro - ecosystems . Doutt and Nakata show how the leafhopper pest of Californian vineyards is controlled at some sites by a parasitic insect ...
... pest management . Evidence suggests benefits would arise from reintroducing diversity to our agro - ecosystems . Doutt and Nakata show how the leafhopper pest of Californian vineyards is controlled at some sites by a parasitic insect ...
Page 144
... pests of a given crop may arise from the segregation of a reduced number of species already present in the wild . Pest status is reached because improved conditions are produced for the existence of this reduced number by the actions of ...
... pests of a given crop may arise from the segregation of a reduced number of species already present in the wild . Pest status is reached because improved conditions are produced for the existence of this reduced number by the actions 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