Cale Ac Gushulak

Biographic Data

ID1542469
NAMECale Ac Gushulak
GIVEN NAMESCale Ac
FAMILY NAMEGushulak
SIGNATUREGUSHULAK C A
AFFILIATIONSQueen's University
ORCID0000-0001-9780-3886
VERIFIEDYes
TOTAL WORKS5
TOTAL CITATIONS19
WORKS AS AUTHOR5
WORKS AS EDITOR0
FIRST PUBLICATION YEAR2019
LATEST PUBLICATION YEAR2023
H-INDEX2

  • The varved succession of Crawford Lake, Milton, Ontario, Canada as a candidate Global boundary Stratotype Section and Point for the Anthropocene series

    Open AccessFrancine Mg Mccarthy, Robert T Patterson et al.ARTICLEThe Anthropocene Review2023Cited by: 17References: 41

    An annually laminated succession in Crawford Lake, Ontario, Canada is proposed for the Global boundary Stratotype Section and Point (GSSP) to define the Anthropocene as a series/epoch with a base dated at 1950 CE. Varve couplets of organic matter capped by calcite precipitated each summer in alkaline surface waters reflect environmental change at global to local scales. Spheroidal carbonaceous particles and nitrogen isotopes record an increase in…

  • Changes in the prairie–forest ecotone in northwest Ontario (Canada) across the Holocene

    Open AccessDonya C Danesh, Cale Ac Gushulak et al.ARTICLEQuaternary Research2022

    Pollen and diatom assemblages from well-dated sediment cores from three lakes forming a west-to-east transect across the boreal forest in northwest Ontario (Canada) were used to evaluate the timing and nature of the movement of the prairie–forest ecotone (PFE) across the Holocene. Changes in vegetation, temperature, and effective moisture were inferred from pollen and pollen-based transfer functions. Analyses indicated site-specific vegetational …

  • Basin-specific records of lake oligotrophication during the middle-to-late Holocene in boreal northeast Ontario, Canada

    Open AccessCale Ac Gushulak, Peter R Leavitt et al.ARTICLEThe Holocene2021References: 13

    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…

  • Siliceous algae response to the “Great Acceleration” of the mid-20th century in Crawford Lake (Ontario, Canada)

    Open AccessCale Ac Gushulak, Matthew Marshall et al.ARTICLEThe Anthropocene Review2021Cited by: 2References: 4

    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 mi…

  • Complex responses of phototrophic communities to climate warming during the Holocene of northeastern Ontario, Canada

    Open AccessBrett G Elmslie, Cale Ac Gushulak et al.ARTICLEThe Holocene2019References: 13

    Historical changes in Holocene climate in northeastern Ontario were quantified using analyses of sedimentary pollen, diatoms, and pigments in a small boreal lake. Modern analog reconstructions of average temperature from Holocene pollen assemblages of Charland Lake showed temperature was ~2°C warmer than present conditions ~7800–4500 cal. yr BP, a time period consistent with the Holocene thermal maximum (HTM). Pollen data suggest a two-phase HTM:…