Textbook of Theoretical Botany, Volume 4 |
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Page 3367
... produced . competing species is much reduced if they are over - dispersed , i.e. clumped , and that their mutual ... produces seeds of variable weight and a popu- lation from large seeds in competition with a population from small seeds ...
... produced . competing species is much reduced if they are over - dispersed , i.e. clumped , and that their mutual ... produces seeds of variable weight and a popu- lation from large seeds in competition with a population from small seeds ...
Page 3369
... producing any certainty . Clear evidence for the excretion of organic poisons from intact roots is wanting , though small ... produced substances in the water which were toxic to the roots of Triticum , but in the case of Encelia the ...
... producing any certainty . Clear evidence for the excretion of organic poisons from intact roots is wanting , though small ... produced substances in the water which were toxic to the roots of Triticum , but in the case of Encelia the ...
Page 3372
... producing a negative correlation in their distribution in a community , because the more vigorous of two species will ... produced by toxic substances in the soil , which injure some species more than others , though all may be affected ...
... producing a negative correlation in their distribution in a community , because the more vigorous of two species will ... produced by toxic substances in the soil , which injure some species more than others , though all may be affected ...
Contents
A RETROSPECT OF ECOLOGY | 3317 |
SCOPE AND Objectives of ECOLOGY | 3333 |
CONCEPTS USED IN ECOLOGY | 3340 |
Copyright | |
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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