Early postglacial chironomid succession in southwestern British Columbia, Canada, and its paleoenvironmental significance.
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| Authors: | Walker, I.R.; Mathewes, R.W. |
| Year: | 1989 |
| Journal: | Journal of Paleolimnology 2 Article Link (DOI) |
| Title: | Early postglacial chironomid succession in southwestern British Columbia, Canada, and its paleoenvironmental significance. |
| Abstract: | Chironomids typical of cold, well-oxygenated, oligotrophic environments are common in late-Pleistocene deposits, but these taxa are rare in Holocene sediments of most small temperate lakes. Hypotheses to explain the demise of these taxa include variations in climate, lake trophic state, lake levels, terrestrial vegetation, and/or sediment composition. In southwestern British Columbia, this demise correlates with palynological evidence for a lodgepole pine decline, and for rapid climatic amelioration, at about 10,000 yr B.P. Faunal change are poorly correlated with lithological boundaries. The similar timing of the declines among lakes suggests that a regional influence, climate, has possibly been the principal determinant of early chironomid faunal succession. |
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