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Effect of open-field experimental warming on the leaf phenology of oriental oak (Quercus variabilis) seedlings

Journal of Plant Ecology 2014年第6期7卷 559-566页

作者： Saerom Han Haegeun Chung Nam Jin Noh Sun Jeoung Lee Wooyong Jo Tae Kyung Yoon koong Yi Chan-woo Park suin ko Yowhan Son Department of Environmental Science and Ecological Engineering Graduate SchoolKorea UniversitySeoul 136-713Korea Department of Environmental Engineering Konkuk UniversitySeoul 143-701Korea River Basin Research Center Gifu UniversityGifu 501-1193Japan Forest and Climate Change Center Korea Forest Research InstituteSeoul 130-712Korea Hanlim Patent and Law Office Seoul 152-050Korea Forest Soil and Water Conservation Division Korea Forest Research InstituteSeoul 130-712Korea Environmental Policy Research Group Korea Environment InstituteSeoul 122-706Korea

Aims An open-field warming experiment enables us to test the effects of projected temperature increase on change in plant phenology with fewer confounding factors and to study phenological response to temperature ranges beyond natural *** study aims to(i)examine the effect of temperature increase on leaf unfold-ing and senescence of oriental oak(Quercus variabilis Blume)under experimental warming and(ii)measure temperature-related parameters used in estimating phenological response to tempera-ture *** Using an open-field warming system with infrared heaters,we increased the air temperature by~3℃ in the warmed plots compared with that of the control plots consistently for 2 *** unfolding and senescence dates of *** seedlings were recorded and temperature-related phenological parameters were *** Findings The timing of leaf unfolding was advanced by 3-8 days(1.1-3.0 days/℃)and the date of leaf senescence was delayed by 14-19 days(5.0-7.3 days/℃)under elevated air ***,the cumulative degree days(CDD)of leaf unfolding were not significantly changed by experimental warming,which suggest the applicability of a constant CDD value to estimate the change in spring leaf phe-nology under 3℃ *** ranges of advancement and temperature sensitivity in spring phenology and delayed autumn phe-nology and proposed temperature parameters from this study might be applied to predict future phenological change.

关键词： climate change cumulative degree days experimental warming leaf senescence leaf unfolding

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