Responses of spring phenology in temperate zone trees to climate warming: A case study of apricot flowering in China

摘要: The timing of spring phenology in most temperate zone plants results from the combined effects both autumn/winter cold and heat. Temperature increases can advance phases, but warming autumn winter may slow fulfilment chilling requirements lead to later onset events, as evidenced by recent delays response at some locations. As continues, phenology-delaying impacts higher temperatures increase importance, could eventually attenuate - or even reverse phenology-advancing effect springs that has dominated plant responses climate change so far. To test this hypothesis, we evaluated temperature apricot bloom five climatically contrasting sites China. Long-term records first flowering dates were related data daily resolution, forcing periods identified Partial Least Squares (PLS) regression against chill heat accumulation rates. We then analyzed variation during on tree for each site. Results indicated climates, apricots is almost entirely determined conditions, with warmer leading earlier bloom. However, locations, main driver timing, implying further might cause delayed phases. global progresses, current trends advancing turn into increasing numbers species. (C) 2014 Authors. Published Elsevier B.V.