Basic BiogeographyFirst published in 1985. Routledge is an imprint of Taylor & Francis, an informa company. |
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Page 27
... values to the sampling area . 2. FREQUENCY This measures the regularity of distribution throughout the community . If we sample a moorland with 50 quadrats and Calluna vulgaris ( common heather ) occurs in every quadrat and Erica ...
... values to the sampling area . 2. FREQUENCY This measures the regularity of distribution throughout the community . If we sample a moorland with 50 quadrats and Calluna vulgaris ( common heather ) occurs in every quadrat and Erica ...
Page 29
... value as six oak trees and , if they both are regularly distributed , they could have the same frequency value . Their cover values , however , would clearly indicate the differences in their contribution to the overall vegetation ...
... value as six oak trees and , if they both are regularly distributed , they could have the same frequency value . Their cover values , however , would clearly indicate the differences in their contribution to the overall vegetation ...
Page 202
... values of natural sulphur concentrations may be misleading in the evaluation of local acid rain causes and therefore all high values may not be entirely due to pollutant sources . However , man is clearly the cause of most acid rain and ...
... values of natural sulphur concentrations may be misleading in the evaluation of local acid rain causes and therefore all high values may not be entirely due to pollutant sources . However , man is clearly the cause of most acid rain and ...
Contents
Introduction | 3 |
Initial approaches to vegetation study | 12 |
Initial approaches to soil study | 34 |
Copyright | |
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acid agricultural animals approach areas biogeography birch Britain British Isles brown earths bryophyte Cairngorm Calluna cations cent changes chemical clay climatic climax vegetation complex conifers conservation coypus crop cycle deciduous deer disturbance dominant Ecol ecology ecosystem energy environment environmental erosion example factors fire Flandrian forest Forestry Forestry Commission gley soils grass grazing ground flora growth habitat heather herbivores horizon humus important increase influence input insect land landscape layer leached lichen litter mainly methods mineral moorland moors mountain natural nutrients oakwood occur organic parent material pattern peat pest pine pinewood Pinus plant communities podzol pollen population present PRINT#3 production quadrats Quercus Quercus petraea recent region sample Scotland Scots pine Scottish Highlands seed seedlings shrubs slopes species structure surface Table temperature tree-line trees trophic level tropical upland values vegetation wood woodland Zealand zone