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 66
The successions described by Clements were essentially linear in form. Various
workers have since reported cyclic successions. These are now thought to be
reasonably common. Two examples should make this clear. On windswept
ridges ...
The successions described by Clements were essentially linear in form. Various
workers have since reported cyclic successions. These are now thought to be
reasonably common. Two examples should make this clear. On windswept
ridges ...
Page 213
When not so pronounced, the soils are more properly described as podzolized
acid brown soils and they usually have a moder humus. Mackney and Burnham
note that in this case the Ea horizon still contains some iron content and is often ...
When not so pronounced, the soils are more properly described as podzolized
acid brown soils and they usually have a moder humus. Mackney and Burnham
note that in this case the Ea horizon still contains some iron content and is often ...
Page 219
Taylor has described the influence of slope on British soils by considering a
theoretical transect from an exposed high plateau above 300 m with rainfall
above 1,500 mm (60 in) p.a. through upper, middle and lower valley-side slopes
to a ...
Taylor has described the influence of slope on British soils by considering a
theoretical transect from an exposed high plateau above 300 m with rainfall
above 1,500 mm (60 in) p.a. through upper, middle and lower valley-side slopes
to a ...
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Contents
Introduction | 3 |
Initial approaches to vegetation study | 11 |
Initial approaches to soil study | 28 |
Copyright | |
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acidic activities agricultural animals approach areas associated become birch Britain British brown cause changes chemical Class clay climatic complex cover crop cycle described detailed determine dominant early ecological ecosystem effect energy environment environmental established example exist factors field fire forest frequently further gley grass grazing ground growing growth horizon humus important increase influence insect land layer less limit loss material measure methods mountain native natural North nutrients oakwoods occur operate organic particularly pattern peat period pest pine plant podzol population present problem produce reach recent reference region relatively result seedlings similar slopes soil species spread stage stands structure succession surface Table tree tree-line types unit upland usually variations various vegetation whilst wood woodland zone