Textbook of Theoretical Botany, Volume 4 |
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Page 3432
... variation may occur in many directions , so that many variation series are traceable , Poore imagines the following model . In a three - dimensional matrix the communities are placed in relation to each other so that each line of variation ...
... variation may occur in many directions , so that many variation series are traceable , Poore imagines the following model . In a three - dimensional matrix the communities are placed in relation to each other so that each line of variation ...
Page 3484
... variation , after the establishment of the principal axis of maximal variation between stands ( see p . 3482 ) . The principal axis must coincide with the direction of maximal variation between stands . Only if this is so is the ...
... variation , after the establishment of the principal axis of maximal variation between stands ( see p . 3482 ) . The principal axis must coincide with the direction of maximal variation between stands . Only if this is so is the ...
Page 3760
... variation , which brings in entirely different algal populations in different areas . Exposure during low tide is undoubtedly the dominant factor on the beach . Variations of salinity or pH in the water have comparatively small effects ...
... variation , which brings in entirely different algal populations in different areas . Exposure during low tide is undoubtedly the dominant factor on the beach . Variations of salinity or pH in the water have comparatively small effects ...
Contents
A RETROSPECT OF ECOLOGY | 3317 |
SCOPE AND Objectives of ECOLOGY | 3333 |
CONCEPTS USED IN ECOLOGY | 3340 |
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acid Africa algae alpine America amount analysis Angiosperms Antarctica Arctic association biotypes Calluna carbonate cent centre changes climate colloids competition complex continental Cretaceous density depth diploid dispersal distribution dominant ecological ecotypes edaphic effect endemic environment epilimnion Europe example factors families flora floristic floristic provinces forest frequency genera genetic genus geographical geological grassland growth habitat halophytes humidity humus hypolimnion important increase individuals lakes latitude layer limited lower metres migration mineral montane mountains mycorrhiza natural North America northern number of species occur oceanic organic origin peat period phosphate photosynthesis physiognomy plankton plant communities Plant Geography podsols polyploidy population quadrats radiation rainfall region relationships relatively relict roots salinity sample season seeds soil South surface taxonomic temperate temperature tion trees Tropic of Cancer Tropic of Capricorn tropical units variation vegetation wide zone