Bibliographic Citation
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Title | Evolutionary effects of metalliferous and other anomalous soils in South Central Africa |
Creator/Author | Wild, H. ; Bradshaw, A.D. |
Publication Date | 1977 Jun 01 |
OSTI Identifier | OSTI ID: 6039594 |
Other Number(s) | CODEN: EVOLA |
Resource Type | Journal Article |
Resource Relation | Evolution ; Vol/Issue: 31:2 |
Research Org | Univ. of Rhodesia, Salisbury |
Subject | 510200 -- Environment, Terrestrial-- Chemicals Monitoring & Transport-- (-1989) ;560303 -- Chemicals Metabolism & Toxicology-- Plants-- (-1987); COPPER-- TOXICITY;NICKEL-- TOXICITY;PLANTS-- BIOLOGICAL EVOLUTION;PLANTS-- TOLERANCE;SOILS-- CONTAMINATION; BIOLOGICAL ACCUMULATION;CLIMATES;EUROPE;PLANT GROWTH;POPULATION DYNAMICS;SOUTH AFRICA;SPECIES DIVERSITY |
Related Subject | AFRICA;ELEMENTS;GROWTH;METALS;TRANSITION ELEMENTS |
Description/Abstract | The extensive metalliferous and other anomalous soils of South Central Africa have been in existence since before the origin of the angiosperms.^So, they should have provided situations in which evolution could have continued uninterrupted, except by major climatic changes, over very long periods.^The floras on these areas have therefore been examined, and compared to the situation in Northern Europe.^The African anomalous floras could be expected to show: (a) a larger number of species which occupy the anomalous soils; this is certainly true; (b) a greater distinctiveness of the populations tolerating the anomalous soils; there is only a little evidence for this; (c) a greater number of tolerant populations which have attained the status of distinct endemic species but which have close relatives; there are a few examples of these; (d) a greater number of tolerant endemic species which have lost their close relatives; there are quite a large number of these, some specific to individual areas of a particular type of anomalous soil.^The greater number of endemics is a definite characteristic of the floras.^However, despite their great stability, the anomalous areas are not occupied by a flora consisting mostly of endemic species.^It is clear that many of the plant populations on the areas must be of recent origin.^This suggests that there have been sufficient climatic and other changes to eliminate many of the original colonists and allow the immigration of others. |
Country of Publication | United States |
Language | English |
Format | Pages: 282-293 |
System Entry Date | 2001 May 13 |
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