کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1046230 944874 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A late-glacial transition from Picea glauca to Picea mariana in southern New England
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
A late-glacial transition from Picea glauca to Picea mariana in southern New England
چکیده انگلیسی

Picea is an important taxon in late-glacial pollen records from eastern North America, but little is known about which species of Picea were present. We apply a recently developed palynological method for discriminating the three Picea species in eastern North America to three records from New England. Picea glauca was dominant at ∼ 14,500–14,000 cal yr BP, followed by a transition to Picea mariana between ∼ 14,000 and 13,500 cal yr BP. Comparison of the pollen data with hydrogen isotope data shows clearly that this transition began before the beginning of the Younger Dryas Chronozone. The ecological changes of the late-glacial interval were not a simple oscillation in the position of a single species' range, but rather major changes in vegetation structure and composition occurring during an interval of variations in several environmental factors, including climate, edaphic conditions, and atmospheric CO2 levels.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary Research - Volume 67, Issue 3, May 2007, Pages 502–508
نویسندگان
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