Basic Biogeography |
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Page 84
... appear to be identical in most aspects of their behaviour will differ slightly in one and this may permit their co - existence . A good example is provided by Lack who studied the feeding habits of two similar sea - birds around the ...
... appear to be identical in most aspects of their behaviour will differ slightly in one and this may permit their co - existence . A good example is provided by Lack who studied the feeding habits of two similar sea - birds around the ...
Page 96
... appears ( at about 20 miles from the city centre on the south , 50 miles to the north ) . 6. A zone with two smooth , grey foliose lichens appearing , Parmelia perlata and Parmelia reticulata , together with Usnea subfloridana , a ...
... appears ( at about 20 miles from the city centre on the south , 50 miles to the north ) . 6. A zone with two smooth , grey foliose lichens appearing , Parmelia perlata and Parmelia reticulata , together with Usnea subfloridana , a ...
Page 175
... appears to be moderately good . Quite a few seedlings establish around the edges of the wood but these are browsed by sheep , cattle and ponies . Photographic evidence shows the wood to have expanded slightly since the time of Tansley's ...
... appears to be moderately good . Quite a few seedlings establish around the edges of the wood but these are browsed by sheep , cattle and ponies . Photographic evidence shows the wood to have expanded slightly since the time of Tansley's ...
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 biotic birch Britain British Isles brown earths Cairngorm Cairngorm Mountains Calluna changes chemical clay climatic climax community climax vegetation complex conservation 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 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 stage structure surface Table temperature timber-line tree-line upland usually variations vegetation whilst wood woodland zone