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Fossil chrysophycean cyst flora in a small meromictic lake in southern Ontario, and its paleoecological interpretation
Abstract
Fossil chrysophycean cysts were identified and counted from the laminated sediment core from Crawford Lake. Thirty-two morphotypes have been described, most of them for the first time. The detailed description of the cysts is presented, including scanning electron photomicrographs. The abundance of certain morphotypes appears to be related to lake paleoproductivity. On this basis, fossil cyst flora have been divided into three characteristic groups: eutrophic–, mesotrophic–, and oligotrophic–meromictic forms. Our data demonstrate that chrysophycean cyst distribution can reflect lake conditions and, therefore, are potentially useful in paleoecological studies.
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“Subsequent analysis of siliceous microfossil assemblages and pigments at relatively high resolution through the 20th century in gravity cores revealed substantial changes in algal communities around 1954 CE (Rybak and Dickman, 1988; Rybak et al., 1987; Supplemental Figure S1).”
From The varved succession of Crawford Lake, Milton, Ontario, Canada as a candidate Global boundary Stratotype Section and Point for the Anthropocene series (2023) · cites this paper as Rybak et al., 1987
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McCarthy, F. M., Patterson, R. T., Head, M. J., Riddick, N. L., Cumming, B. F., Hamilton, P. B., Pisaric, M. F., Gushulak, A. C., Leavitt, P. R., Lafond, K. M., et al. (2023) · The Anthropocene Review · doi:10.1177/20530196221149281 · Cited by 160
“Subsequent analysis of siliceous microfossil assemblages and pigments at relatively high resolution through the 20 th century in gravity cores revealed substantial changes in algal communities around 1954 CE (Rybak and Dickman, 1988; Rybak et al., 1987; Supplemental Figure S1).”
Metadata
- Authors
- Rybak, M., Rybak, I., & Dickman, M.
- Venue
- Canadian Journal of Botany
- Publisher
- Canadian Science Publishing
- Published
- 1987-11-01
- Volume
- 65
- Issue
- 11
- Pages
- 2425-2440
- ISSN
- 0008-4026 (ISSN-L)
- OpenAlex
- W1970576787
- Cited by
- 40
- References
- 0
- Citations by year
- 2026: 2 · 2024: 4 · 2023: 2 · 2021: 3 · 2017: 1 · 2014: 1
- FWCI
- 1.23
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Canadian Journal of Botany (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Protist diversity and phylogeny
- Keywords
- Crawford Lake, meromictic lakes, paleoproductivity, lake trophic state, paleoecology, diatoms, sediment core
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- CoChat. (2026). Citation check: Fossil chrysophycean cyst flora in a small meromictic lake in southern Ontario, and its paleoecological interpretation. https://app.cochat.ai/papers/10.1139/b87-330
- The paper
- Rybak, M., Rybak, I., & Dickman, M. (1987). Fossil chrysophycean cyst flora in a small meromictic lake in southern Ontario, and its paleoecological interpretation. Canadian Journal of Botany. https://doi.org/10.1139/b87-330
