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 23
... unit area , the same number of species present per unit area ( i.e. the density ) and are sampled by the same quadrat size in each case . The only variable is the arrangement of the species ( i.e. the pattern ) in the vegetation , from ...
... unit area , the same number of species present per unit area ( i.e. the density ) and are sampled by the same quadrat size in each case . The only variable is the arrangement of the species ( i.e. the pattern ) in the vegetation , from ...
Page 124
... unit . ( For ' experimental unit ' we may also read community , species or habitat under study as appropriate . ) The many factors of the environment exist as an interacting complex and react as a whole . 2 . 3. Certain of these ...
... unit . ( For ' experimental unit ' we may also read community , species or habitat under study as appropriate . ) The many factors of the environment exist as an interacting complex and react as a whole . 2 . 3. Certain of these ...
Page 125
... units in another area , 40 ft or 40 miles away . The environment possesses the dimensions of space and time . 9 ... unit , if it is observed at other times . 12. Data obtained in controlled environments cannot be applied directly to ...
... units in another area , 40 ft or 40 miles away . The environment possesses the dimensions of space and time . 9 ... unit , if it is observed at other times . 12. Data obtained in controlled environments cannot be applied directly to ...
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