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 42
... litter and soil . Middle row : densities of biota , and oxygen uptake l / m2 . Bottom row : carbon dioxide evolution ml / m2 , mean moisture contents , pH of soil ( 0-2.5 cm ) . C / N ratios of vegetation , litter and soil ...
... litter and soil . Middle row : densities of biota , and oxygen uptake l / m2 . Bottom row : carbon dioxide evolution ml / m2 , mean moisture contents , pH of soil ( 0-2.5 cm ) . C / N ratios of vegetation , litter and soil ...
Page 115
... litter and 8.1 metric tons per hectare per annum total litter . These values should be compared with the average annual litter produced in metric tons per hectare of other community types : Arctic - Alpine communities , 1.0 ; Cool ...
... litter and 8.1 metric tons per hectare per annum total litter . These values should be compared with the average annual litter produced in metric tons per hectare of other community types : Arctic - Alpine communities , 1.0 ; Cool ...
Page 178
... litter ( leaves , catkins , bud - scales , bark , etc. ) . Litter constitutes a major component in the nutrient cycle but a small quantity of chemicals is re - absorbed from the leaves before they fall . This is particularly pronounced ...
... litter ( leaves , catkins , bud - scales , bark , etc. ) . Litter constitutes a major component in the nutrient cycle but a small quantity of chemicals is re - absorbed from the leaves before they fall . This is particularly pronounced ...
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