scholarly journals Pollen Analysis of Varved Sediment At Crawford Lake, Ontario: Evidence of Indian and European Farming [Chapter 7: Quaternary Environments in Canada As Documented By Paleobotanical Case Histories]

1989 ◽  
Author(s):  
J H Mcandrews ◽  
M Boyko-diakonow
Keyword(s):  
Pollen Analysis ◽  
Lake Ontario ◽  
Case Histories ◽  
Varved Sediment ◽  
European Farming ◽  
Crawford Lake

scholarly journals Residual magnetic total field, Crawford Lake, Ontario

2003 ◽  
Author(s):  
D Oneschuk ◽  
M Coyle ◽  
R Dumont
Keyword(s):  
Lake Ontario ◽  
Total Field ◽  
Crawford Lake

LIMNO-CHEMICAL MYSTERY RESOLVED FOR CRAWFORD LAKE, ONTARIO, CANADA; GSSP CANDIDATE FOR THE ANTHROPOCENE EPOCH

2020 ◽  
Author(s):  
Brendan M. Llew-Williams ◽  
◽  
Francine McCarthy ◽  
Kevin W. Turner ◽  
Michael D. MacKinnon ◽  
...  
Keyword(s):  
Lake Ontario ◽  
Crawford Lake

scholarly journals Siliceous algae response to the “Great Acceleration” of the mid-20th century in Crawford Lake (Ontario, Canada): A potential candidate for the Anthropocene GSSP

2021 ◽  
pp. 205301962110460
Author(s):  
Cale AC Gushulak ◽  
Matthew Marshall ◽  
Brian F Cumming ◽  
Brendan Llew-Williams ◽  
R Timothy Patterson ◽  
...  
Keyword(s):  
20Th Century ◽  
Environmental Changes ◽  
Additive Model ◽  
Lake Ontario ◽  
Rate Of Change ◽  
Potential Candidate ◽  
Change Analysis ◽  
Siliceous Algae ◽  
Great Acceleration ◽  
Crawford Lake

Diatom and chrysophyte assemblages from varved sediments of meromictic Crawford Lake, Ontario record major environmental changes resulting from spatially broadening anthropogenic environmental stressors related to the “Great Acceleration” in the mid-20th century. Biannual assessment of diatom and chrysophyte assemblages over the last ~200 years allowed for rate of change analysis between adjacent samples that increased substantially during the mid-20th century, concurrent with significant generalized additive model trends. Changes in diatom and chrysophyte assemblages were likely driven by multiple anthropogenic stressors including local forestry harvesting, agriculture, and milling activities, acidic deposition from regional industrial processes, and anthropogenic climate warming. Novel siliceous algal assemblages now exist in Crawford Lake, likely related to the complexities of the above mentioned local and regional stressors. The major assemblage changes at the proposed base of the Anthropocene Epoch detected in this study support the laminated sequence from Crawford Lake as a strong potential candidate for the Anthropocene GSSP.

Diatom assemblage response to Iroquoian and Euro-Canadian eutrophication of Crawford Lake, Ontario, Canada

2006 ◽  
Vol 37 (2) ◽  
pp. 233-246 ◽  
Author(s):  
Erik J. Ekdahl ◽  
Jane L. Teranes ◽  
Chad A. Wittkop ◽  
Eugene F. Stoermer ◽  
Euan D. Reavie ◽  
...  
Keyword(s):  
Lake Ontario ◽  
Diatom Assemblage ◽  
Crawford Lake
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