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Ivanka Stefanova
Researcher at University of Minnesota
Publications - 17
Citations - 800
Ivanka Stefanova is an academic researcher from University of Minnesota. The author has contributed to research in topics: Holocene & Younger Dryas. The author has an hindex of 10, co-authored 17 publications receiving 712 citations. Previous affiliations of Ivanka Stefanova include Bulgarian Academy of Sciences.
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Recent burning of boreal forests exceeds fire regime limits of the past 10,000 years
Ryan Kelly,Melissa L. Chipman,Philip E. Higuera,Ivanka Stefanova,Linda B. Brubaker,Feng Sheng Hu +5 more
TL;DR: It is suggested that boreal forests can sustain high-severity fire regimes for centuries under warm and dry conditions, with vegetation feedbacks modulating climate–fire linkages.
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Fire cycles in North American interior grasslands and their relation to prairie drought
K. J. Brown,James S. Clark,Eric C. Grimm,Joseph J. Donovan,Pietra G. Mueller,Barbara C. Hansen,Ivanka Stefanova +6 more
TL;DR: High-resolution analyses of a late Holocene core from Kettle Lake in North Dakota reveal coeval fluctuations in loss-on-ignition carbonate content, percentage of grass pollen, and charcoal flux, indicative of climate-fuel-fire cycles that have prevailed on the Northern Great Plains for most of theLate Holocene.
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Lateglacial and Holocene vegetation belts in the Pirin Mountains (southwestern Bulgaria)
Ivanka Stefanova,Brigitta Ammann +1 more
TL;DR: Pollen stratigraphy of a core 270 cm long from Lake Dalgoto at 2310 m in the Northern Pirin Mountains, southern Bulgaria, was treated by optimal partitioning and compared to a broken-stick model to reveal statistically significant pollen zones.
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Woodland-to-forest transition during prolonged drought in Minnesota after ca. AD 1300
TL;DR: Tree-ring data from the "Big Woods" of central Minnesota show a peak in the recruitment of key Big Woods tree species during the AD 1930s drought and suggest that low regional moisture balance need not have been a limiting factor for forest expansion.
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Response of C3 and C4 plants to middle-Holocene climatic variation near the prairie–forest ecotone of Minnesota
TL;DR: In this paper, the effects of warm/dry climatic conditions on prairie-woodland ecosystems were examined using the middle Holocene (MH) sediments from West Olaf Lake (WOL) and Steel Lake (SL) in Minnesota.