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
... become established first . This pioneer community mainly consists of lichens and algae . After a few years the fresh rock surface weathers slightly and loose rock fragments collect in cracks and between boulders . These changed ...
... become established first . This pioneer community mainly consists of lichens and algae . After a few years the fresh rock surface weathers slightly and loose rock fragments collect in cracks and between boulders . These changed ...
Page 57
... become established as a plagioclimax , although it is not a plant featuring in the normal hydrosere stages . More recently , decline in the use of saw sedge for thatching has led to some replacement of purple moor - grass as reversion ...
... become established as a plagioclimax , although it is not a plant featuring in the normal hydrosere stages . More recently , decline in the use of saw sedge for thatching has led to some replacement of purple moor - grass as reversion ...
Page 107
... become established in the kampfzone in so far as they are able to tolerate or avoid any adverse microclimatic variations found there . Wardle's research indicates that some tree species , such as Nothofagus solandri , only become ...
... become established in the kampfzone in so far as they are able to tolerate or avoid any adverse microclimatic variations found there . Wardle's research indicates that some tree species , such as Nothofagus solandri , only become ...
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