Basic Biogeography |
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Page 55
Nigel Pears. n stage ( Climax community ) n - 1 stage ( Pre - climax community ) 4th stage 3rd stage Prisere Perhaps several decades , or more than 100 years 2nd stage ↑ 1st stage ( Pioneer community ) A few years Fig . 4.5 The stages ...
Nigel Pears. n stage ( Climax community ) n - 1 stage ( Pre - climax community ) 4th stage 3rd stage Prisere Perhaps several decades , or more than 100 years 2nd stage ↑ 1st stage ( Pioneer community ) A few years Fig . 4.5 The stages ...
Page 56
Nigel Pears. n stage ( The climax ) | n - 1 stage Subsere stages b f.r.- 3rd stage III The plagioclimax ↑ 2nd stage ↑ 1st stage ( Pioneer ) ( a ) The normal prisere f.a. Plagiosere stages ( b ) The deflected sere ( f.a. factor applied ...
Nigel Pears. n stage ( The climax ) | n - 1 stage Subsere stages b f.r.- 3rd stage III The plagioclimax ↑ 2nd stage ↑ 1st stage ( Pioneer ) ( a ) The normal prisere f.a. Plagiosere stages ( b ) The deflected sere ( f.a. factor applied ...
Page 57
... stage is being replaced by short - grass communities . These become stabilized as a plagioclimax under the operation of this persistent factor . The first short - grass species appear as patches , forming a mosaic within the tall sword ...
... stage is being replaced by short - grass communities . These become stabilized as a plagioclimax under the operation of this persistent factor . The first short - grass species appear as patches , forming a mosaic within the tall sword ...
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