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 66
... lichen Cladonia rangifera ( reindeer moss ) establishes itself in the patch . But by this time the other two species have begun to die off . When the lichen dies the whole cycle may start again . So we have a succession of the form : Lichen ...
... lichen Cladonia rangifera ( reindeer moss ) establishes itself in the patch . But by this time the other two species have begun to die off . When the lichen dies the whole cycle may start again . So we have a succession of the form : Lichen ...
Page 95
... lichens on trees . 2. A zone in which the grey - green crustose lichen , Lecanora conizaeoides appears at base of trunk first and then gradually higher up the tree . 3. A zone in which the grey , narrow - lobed foliose lichen , Parmelia ...
... lichens on trees . 2. A zone in which the grey - green crustose lichen , Lecanora conizaeoides appears at base of trunk first and then gradually higher up the tree . 3. A zone in which the grey , narrow - lobed foliose lichen , Parmelia ...
Page 96
... lichen ( at about 30 miles to the south , but up to 100 miles to the north - east ) . 7. A fragmentary zone , confined to old forest and parklands in sheltered valleys , where the large lugwort lichen , Lobarca pulmonaria is found . A ...
... lichen ( at about 30 miles to the south , but up to 100 miles to the north - east ) . 7. A fragmentary zone , confined to old forest and parklands in sheltered valleys , where the large lugwort lichen , Lobarca pulmonaria is found . A ...
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