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首页> 外文期刊>Southeastern naturalist >Flowering phenology: Trends over 32 years in a common garden
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Flowering phenology: Trends over 32 years in a common garden

机译：开花物候：在一个共同的花园中超过32年的趋势

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摘要

Flowering times of some early-season plants vary with temperature. First flowering dates of 35 native spring herbs and one shrub (Lindera benzoin [Northern Spicebush]), recorded yearly from 1976 through 2008 in a common garden in western North Carolina, were analyzed to determine if they correlate with January or spring (FebruaryMay) temperature or show a trend over time. We also asked if species that flower earlier in the season are more tightly correlated with temperature than later-season species. One early-season (average flowering date = March 6) species, Carex plantaginea (Plantainleaf Sedge) and one later-season (average flowering date = April 11) species, Geranium maculatum (Spotted Geranium), showed a significant trend of flowering earlier over time; seven April-flowering species showed weak, statistically non-significant, trends of earlier flowering over time; and one species (Iris cristata) exhibited a weak trend of later flowering over time. Four mid-season (mid-Marchearly April) species showed a significant trend, and seven species showed a weaker, not significant trend, of earlier flowering in years with warmer January or spring temperatures. Overall, weak seasonal and longer-term responsiveness despite variation in soil and air temperatures over the site, multiple plantings for some species, and only a modest 0.28 °C increase in average January temperature over the 32-year observation period suggest flowering phenology of at least some plants in this common garden will track future climate change.
机译：一些早季植物的开花时间随温度而变化。分析了从1976年至2008年每年在北卡罗来纳州西部的一个公共花园中记录的35种天然春季草药和一种灌木的初次开花日期（林德拉安息香[Northern Spicebush]），以确定它们是否与1月或春季（2月）的温度相关。或显示一段时间内的趋势。我们还询问在季节较早开花的物种是否比季节较晚的物种与温度的关系更紧密。一种早季（平均开花日期= 3月6日）的种，Carex plantaginea（车前草S）和一种较晚季节（平均开花日期= 4月11日）的种，天竺葵黄斑（Spotted Geranium），表现出较早开花的显着趋势。时间;七月开花的物种显示随着时间的推移较弱，在统计学上不显着的早开花趋势;一种物种（鸢尾鸢尾）表现出较弱的后期开花趋势。在1月或春季温度较高的年份中，有4个季节中期（4月中旬至3月中旬）物种表现出明显的趋势，而7个物种则表现出较弱但不显着的早期开花趋势。总体而言，尽管该地点的土壤和空气温度有所变化，季节性和长期响应性较弱，某些物种多次种植，并且在32年的观察期内平均一月平均温度仅适度增加0.28°C，这表明该地区的开花物候至少这个共同花园中的一些植物会追踪未来的气候变化。

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