The effects of ice storm on seed rain and seed limitation in an evergreen broad-leaved forest in east China
The effects of ice storm on seed rain and seed limitation in an evergreen broad-leaved forest in east China
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DOI：
10.1016/j.actao.2012.01.006
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发表时间：
2012-02-01
影响因子：
1.8
通讯作者：
Ma, Keping
中科院分区：
文献类型：
--
作者：
Du, Yanjun;Mi, Xiangcheng;Ma, Keping
极端气候事件几乎普遍在影响动植物群落的组成和结构方面发挥着重要作用，因此可能影响种子生产、种子传播和幼苗补充。我们在中国东部常绿阔叶林的 24 公顷永久林地中探讨了冰暴损害对种子雨和种子限制的影响。我们比较了2008年风暴前后的种子产量。我们评估了以下假设：1）冰暴之后的种子产量低于风暴之前；2）风暴之后的种子限制比风暴之前更严重。结果显示，暴风雨后的种子雨中，以柃树（Eurya muricata）的种子为主，占种子总数的一半以上。除E. muricata 以外，冰灾后其他物种的种子产量仅为风暴前的五分之一。冰暴后的第二年种子产量恢复到暴风雨前的水平。结果表明，对冰暴的反应存在巨大的种间差异。冰暴造成的干扰大大增加了种子的多样性。冰暴前后物种的杰卡德相似度为58%。风暴前后种子限制或传播限制没有显着差异，但源限制存在显着差异。种子限制和传播限制均与传播模式无关。冰暴过后，只有啮齿动物分散物种的来源限制有所增加。 (C) 2012 Elsevier Masson SAS。版权所有。
Extreme climatic events almost universally play a major role in influencing the composition and structure of plant and animal communities, and thus could influence seed production, seed dispersal and seedling recruitment. We explored the effects of ice storm damage on seed rain and seed limitation in a 24-ha permanent forest plot in an evergreen broad-leaved forest in east China. We compared seed production before and after the storm in 2008. We evaluated the following hypotheses: 1) seed production after the ice storm was less than that before the storm: 2) seed limitation after the storm was more severe than before the storm. The results showed that seeds from one species, Eurya muricata, dominated the seed rain after the storm, accounting for more than half of the total seeds. Post-ice storm seed production of species other than E. muricata was only one fifth of that before the storm. Seed production in the second year after the ice storm recovered to pre-storm levels. The results indicate large inter-specific variation in response to the ice storm. Disturbance caused by the ice storm greatly increased seed diversity. The Jaccard similarity of species before and after the ice storm was 58%. There was no significant difference in seed limitation or dispersal limitation before and after the storm, but there was a significant difference in source limitation. Neither seed limitation nor dispersal limitation was correlated with dispersal modes. Only source limitation for rodent dispersed species increased after the ice storm. (C) 2012 Elsevier Masson SAS. All rights reserved.