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 190
According to Cousens, if the number of Bupalus pupae in the pinewood litter
each winter does not exceed 5 per square metre the subsequent looper
population will not reach epidemic proportions. Steven and Carlisle report the
suggestion of ...
According to Cousens, if the number of Bupalus pupae in the pinewood litter
each winter does not exceed 5 per square metre the subsequent looper
population will not reach epidemic proportions. Steven and Carlisle report the
suggestion of ...
Page 192
A moss layer is present, consisting of Hypnum cupressiforme, Dicranum
scoparium and Hylocomium splendens and, after fire, Erica cinerea (bell heather)
and Vaccinium spp may reach co-dominance locally with the Calluna. This is the
most ...
A moss layer is present, consisting of Hypnum cupressiforme, Dicranum
scoparium and Hylocomium splendens and, after fire, Erica cinerea (bell heather)
and Vaccinium spp may reach co-dominance locally with the Calluna. This is the
most ...
Page 196
Individual heather plants are 7-13 years old and cover values now reach 90 per
cent. Most other plants are greatly suppressed and the groundlevel microclimate
is strongly influenced by the dense, closed Calluna canopy. 3. Mature phase.
Individual heather plants are 7-13 years old and cover values now reach 90 per
cent. Most other plants are greatly suppressed and the groundlevel microclimate
is strongly influenced by the dense, closed Calluna canopy. 3. Mature phase.
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Contents
Introduction | 3 |
Initial approaches to vegetation study | 11 |
Initial approaches to soil study | 28 |
Copyright | |
9 other sections not shown
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Common terms and phrases
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
Bibliographic information
| Title | Basic Biogeography A Longman Text |
| Author | Nigel Pears |
| Edition | 3, illustrated, reprint |
| Publisher | Longman, 1977 |
| Original from | the University of Michigan |
| Digitized | 22 Aug 2011 |
| ISBN | 0582484014, 9780582484016 |
| Length | 272 pages |
| Export Citation | BiBTeX EndNote RefMan |