Low Biodiversity Brings Earlier Bloom

时间:2017-12-10 单词数:2570

双语 中文 英文




As climate change dials up global temperatures, one effect is an earlier flower bloom. But it turns out there’s another factor that also means faster flowering: a loss in biodiversity in a flower field.


"The amount of change in flowering time that we see with diversity loss is in the same magnitude range as the amount of change in flowering time we see with rising temperatures, globally." Amy Wolf, an ecologist at Columbia University and U.C. Davis.

美国哥伦比亚大学和加州大学戴维斯分校的生态学家Amy Wolf说:“我们看到的多样性损失的开花时间变化幅度与全球气温上升时开花时间的变化幅度相同”。

Wolf and her colleagues studied that effect in a grassland in northern California, in study plots with two to 16 species of plants. And they found that, for every two species lost, the remaining flowers blossomed a day earlier, on average. Possibly because the less diverse plots had higher soil temperatures, more moisture, and more nitrogen—all variables that could tweak bloom time. The study is in the Proceedings of the National Academy of Sciences. [Amelia A. Wolf et al., Flowering phenology shifts in response to biodiversity loss]

Wolf和她的同事们在加利福尼亚北部的一片草原上的试验田里研究了这种效应,在研究了2~16物种后发现,对于每两个消失的物种,剩下那那棵花开花时间平均来说提前了一天,可能是因为相对来说不具多样性的地块有更高的土壤温度、更高的水分和更多的氮——所有这些变量导致开花时间出现调整。这项研究结果发表在《美国国家科学院院刊》杂志上。[ Amelia A. Wolf等人,开花物候变化与生物多样性损失的协调机制研究]

The reason it matters because flowers might bloom earlier than pollinators are expecting them. "And that could lead to a whole cascade of things. If plants don’t get pollinated, or they don’t get pollinated well, then you can start to lose species at an even more rapid rate."


Wolf says it’s too soon to know whether biodiversity loss and climate change will have synergistic effects on flower timing. But combine climate change, species loss, and unpredictable ecological effects like this—and you’ve got a pretty ugly arrangement.