Effect of climate change on mast‐seeding species: frequency of mass flowering and escape from specialist insect seed predators
Effect of climate change on mast‐seeding species: frequency of mass flowering and escape from specialist insect seed predators
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气候变化对肥大播种物种的影响：大量开花的频率和躲避专门的昆虫种子捕食者
DOI：
10.1046/j.1365-2486.1998.00172.x
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发表时间：
1998
影响因子：
11.6
通讯作者：
William G. Lee
中科院分区：
文献类型：
--
作者：
M. McKone;D. Kelly;William G. Lee
预计全球地表温度将在下个世纪上升几度，这可能会对生态相互作用产生巨大但人们知之甚少的影响。在这里，我们提出了温度升高对生态优势的新西兰草（Chionochloa spp.）的潜在影响，这些草有大量的花和桅杆种子。来自新西兰五种主要Chionochloa物种的22年数据表明，开花前一年的夏季异常高温是繁花期的前兆。分散前昆虫种子捕食者的攻击在大多数年份明显减少，这显然是因为捕食者种群已经饱和。升高的温度将大大减少Chionochloa开花的年际变化，使种子捕食者的数量增加，并可能每年破坏种子作物。类似的反应可能发生在世界各地的mastative物种中。这种以前未被认识到的全球变暖效应可能对温带生态系统产生广泛的影响。
Global surface temperatures are expected to increase by several degrees in the next century, with potentially large but poorly understood impacts on ecological interactions. Here we propose potential effects of increased temperatures on ecologically dominant New Zealand grasses (Chionochloa spp.) that mass flower and mast seed. Twenty‐two years’ data from five masting Chionochloa species in New Zealand showed that the cue for heavy flowering was unusually high temperature in the summer of the year before flowering. Attack by predispersal insect seed predators was much reduced in mast years, apparently because predator populations were satiated. Increased temperatures would greatly decrease interannual variation in Chionochloa flowering, allowing seed predator populations to increase and potentially to devastate the seed crop annually. Similar responses are likely in masting species worldwide. This previously unrecognized effect of global warming could have widespread impacts on temperate ecosystems.