کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5779948 | 1634689 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fire and ecosystem change in the Arctic across the Paleocene-Eocene Thermal Maximum
ترجمه فارسی عنوان
تغییر آتش و تغییر اکوسیستم در قطب شمال در طول حداکثر حرارتی پالئوسن-ائوسن
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کلمات کلیدی
DCMTLEPETMCIEGDGTTOCMBTPAHAngiospermsFire - آتشDichloromethane - دیکلورمتانCBT - رفتار درمانی شناختی Pristane - سرزمینCarbon isotope excursion - سفر ایزوتوپ کربنmass spectrometer - طیف سنج جرمیPhytane - فیتانArctic - قطب شمالMat - ماتmean annual temperature - میانگین دما سالانهPolycyclic aromatic hydrocarbon - هیدروکربن آروماتیک چند حلقه ایPolycyclic aromatic hydrocarbon (PAH) - هیدروکربن آروماتیک چند حلقه ای (PAH)Paleocene–Eocene Thermal Maximum - پالئوسن-ائوسن حداکثر حرارتیOrganic carbon - کربن آلیtotal lipid extract - کل عصاره چربیTotal organic carbon - کل کربن آلیGlycerol dialkyl glycerol tetraether - گلیسرول دی آلکیل گلیسرول تترایتر
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
Biomarker, fossil, and isotope evidence from site 302 indicates that terrestrial vegetation changed during the PETM. The abundance of the C29n-alkanes, pollen, and the ratio of leaf-wax n-alkanes relative to diterpenoids all indicate that proportional contributions from angiosperm vegetation increased relative to that from gymnosperms. These changes accompanied increased moisture transport to the Arctic and higher temperatures, as recorded by previously published proxy records. We find that PAH abundances were elevated relative to total plant biomarkers throughout the PETM, and suggest that fire occurrence increased relative to plant productivity. The fact that fire frequency or prevalence may have increased during wetter Arctic conditions suggests that changes in fire occurrence were not a simple function of aridity, as is commonly conceived. Instead, we suggest that the climate-driven ecological shift to angiosperm-dominated vegetation was what led to increased fire occurrence. Potential increases in terrestrial plant biomass that arose from warm, wet, and high CO2 conditions were possibly attenuated by biomass burning associated with compositional changes in the plant community.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 467, 1 June 2017, Pages 149-156
Journal: Earth and Planetary Science Letters - Volume 467, 1 June 2017, Pages 149-156
نویسندگان
Elizabeth H. Denis, Nikolai Pedentchouk, Stefan Schouten, Mark Pagani, Katherine H. Freeman,