英国植物在开花时间的快速变化
1Department of Biology, University of York, York YO10 5DD, UK. ahf1@york.ac.uk
Science (New York, N.Y.)
|June 1, 2002
概括
英国植物的开花时间显著提前,许多物种由于气候变化而早些时候开花. 这一趋势突出显示了温度升温对植物现象学的影响.
科学领域:
- 生态生态学 生态生态学
- 现象学 现象学是指现象学.
- 气候变化生物学 气候变化生物学
背景情况:
- 植物现象学,特别是第一次开花的日期,是环境变化的敏感指标.
- 之前的研究已经表明了花期的变化,但长期,大规模的数据对于有力的结论至关重要.
研究的目的:
- 为了研究近几十年来英国植物物种中第一个开花日期的进展.
- 量化开花时间变化的程度,并确定影响物种特定反应的因素.
主要方法:
- 几十年来对385种英国植物种的首次开花日期进行分析.
- 1990年代和前四十年间的花期的统计比较.
- 标识表现出显著早期或晚期开花趋势的物种.
主要成果:
- 与前四个相比,过去十年的平均第一次开花日期提前了4.5天.
- 在20世纪90年代,16%的物种的开花时间显著提前 (平均15天/十年的进步).
- 在20世纪90年代,10种物种 (3%) 的开花日期较晚.
结论:
- 观察到的开花日期的推进代表了迄今为止气候变化的最强烈的生物信号.
- 开花时间对前一个月的温度非常敏感,特别是春季开花的物种.
- 植物对气候变暖的反应中的种际差异将影响植物群体结构和基因流动.
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