Basin-specific records of lake oligotrophication during the middle-to-late Holocene in boreal northeast Ontario, Canada
Bibliographic Data
| ID | 12267246 |
|---|---|
| Authors | Cale Ac Gushulak (0000-0001-9780-3886, Queen's University, corresponding author), Peter R Leavitt (0000-0001-9805-9307, University of Regina), Brian F Cummings (0000-0001-7254-3248, Queen's University) |
| Year | 2021 |
| Volume | 31 |
| Issue | 10 |
| Pages | 1539-1554 |
| Publication date | 2021-06-28 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | The Holocene (JOURNAL) |
| Journal identifiers | ISSN: 0959-6836 • E-ISSN: 1477-0911 |
| Publisher | SAGE Publishing (PUBLISHER • US) |
| DOI | 10.1177/09596836211025972 |
| OpenAlex | W3173641381 |
| Language | EN |
| References cited | 78 |
Descriptions of regional climate expression require data from multiple lakes, yet little is known of how variation in records within morphometrically complex lakes may affect interpretations. In northeast Ontario (Canada), this issue was addressed using records of pollen, pigments, and diatoms in three sediment cores from two small boreal lakes spanning the last ~6000 years. Pollen analysis suggested warm conditions between ~6000 and ~4000 cal yr BP, coherent with previous assessments from boreal eastern Ontario and western Quebec. Analysis of phototrophic communities from fossil pigments and diatom valves suggested relatively eutrophic conditions with lower lake-levels during this interval. Generalized additive model trends identified significant regional changes in pollen assemblages and declines in pigment concentrations after ~4000 cal yr BP consistent with cooler and wetter climate conditions that resulted in regional lake oligotrophication and increased lake levels during the late-Holocene. Despite contemporaneous changes in pollen and pigment biomarkers across lakes, cores collected from adjacent basins of the same lake (Green Lake) did not show similar trends in fossil pigments likely reflecting preferential deposition of clay-rich allochthonous material in the deeper central basin and suggesting that regional signals in climate may be complicated by lake- or basin-specific catchment processes
Boreal · Climate change · Diatom · Drainage basin · Eutrophication · Geography · Holocene · Paleolimnology · Physical geography · Pollen · Sediment · Structural basin · Taiga · Aquatic Ecosystems and Phytoplankton Dynamics · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Ecology · Geology · Oceanography · Paleontology
Reconstruction of Holocene lake level from diatoms, chrysophytes and organic matter in a drainage lake from the Experimental Lakes Area (northwestern Ontario, Canada)
Generalized Additive Models
The spatial and temporal complexity of the Holocene thermal maximum
Radiocarbon Dating of Pollen by Accelerator Mass Spectrometry
Global characterization of the Holocene Thermal Maximum
Ecologically meaningful transformations for ordination of species data
Loss on ignition as a method for estimating organic and carbonate content in sediments
Flexible paleoclimate age-depth models using an autoregressive gamma process
Diatom-based evidence of regional aridity during the mid-Holocene period in boreal lakes from northwest Ontario (Canada)
Complex responses of phototrophic communities to climate warming during the Holocene of northeastern Ontario, Canada
Climate-related eutrophication of a small boreal lake in northwestern Ontario
Changes in fire regime explain the Holocene rise and fall of Abies balsamea in the coniferous forests of western Québec, Canada
Comparison of pollen-slide and sieving methods in lacustrine charcoal analyses for local and regional fire history
IntCal13 and Marine13 Radiocarbon Age Calibration Curves 0–50,000 Years cal BP
| Highly cited | No |
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