6月7日,记者从中科院西双版纳热带植物园获悉,为了解在气候变化下,植物能否跟上气候变化的脚步而生存下来,该园研究员Richard Corlett与澳大利亚联邦科学与工业研究组织的David Westcott 教授合作,发现地球上绝大多数植物很可能并不能紧随气候变化速度,但云南地区情况可能稍好。该研究发表在《生态学与进化趋势》上。
据悉,每一种植物对于气候变化都有一个适应或容忍范围,称为“气候适应区间”。在这个区间内,植物可以生存,否则很可能死去。由于气候变化,植物的这个适应区间在地球表面不断移动,为了能一直待在这个适应区间内,植物也必须随之移动。
通过比较各种植物自身具有的迁移速度及其为适应下一个世纪气候变化具备的迁移速度,研究人员发现,与动物不同,植物在每个世代仅能通过种子散布的方式进行一次迁移行动。
研究人员评估后发现,大多数植物每年的迁移距离小于1千米,而很多其他植物移动的距离则更短。同时,研究还发现,由于云南存在显着的气候梯度,植物很可能通过迁移较短的距离而到达适应区域,即使是迁移较慢的植物也能找到适宜区域而存活下来,这对云南地区来说是个好消息。(生物谷Bioon.com)
生物谷推荐英文摘要:
Trends in Ecology & Evolution DOI:10.1016/j.tree.2013.04.003
Will plant movements keep up with climate change?
Richard T. Corlett1, , David A. Westcott2
In the face of anthropogenic climate change, species must acclimate, adapt, move, or die. Although some species are moving already, their ability to keep up with the faster changes expected in the future is unclear. ‘Migration lag’ is a particular concern with plants, because it could threaten both biodiversity and carbon storage. Plant movements are not realistically represented in models currently used to predict future vegetation and carbon-cycle feedbacks, so there is an urgent need to understand how much of a problem failure to track climate change is likely to be. Therefore, in this review, we compare how fast plants need to move with how fast they can move; that is, the velocity of climate change with the velocity of plant movement.