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 169
... acidic igneous rocks . They often have a more open structure with good light penetration reaching the field - layer . Several shrubs may be present : Betula pubescens ( birch ) is often a main shrub but Ilex aquifolium ( holly ) , Alnus ...
... acidic igneous rocks . They often have a more open structure with good light penetration reaching the field - layer . Several shrubs may be present : Betula pubescens ( birch ) is often a main shrub but Ilex aquifolium ( holly ) , Alnus ...
Page 211
... acidic reactions occur throughout the profile . They tend to be sandy or silty in texture with a low clay content . These soils were formerly known as ' brown earths of low base status ' . 3. Ferritic brown earths with acid mull humus ...
... acidic reactions occur throughout the profile . They tend to be sandy or silty in texture with a low clay content . These soils were formerly known as ' brown earths of low base status ' . 3. Ferritic brown earths with acid mull humus ...
Page 214
... acidic ground waters draining from surrounding limestones collect . The peat is usually a black , well - humified , structureless mass derived from a relatively rich floristic community . Small examples of fen peats exist throughout the ...
... acidic ground waters draining from surrounding limestones collect . The peat is usually a black , well - humified , structureless mass derived from a relatively rich floristic community . Small examples of fen peats exist throughout the ...
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