Asymmetric effects of rodent-mediated seed dispersal on co-existence of tree species via seed-seed interactions
Asymmetric effects of rodent-mediated seed dispersal on co-existence of tree species via seed-seed interactions
复制标题
啮齿动物介导的种子传播通过种子-种子相互作用对树种共存的不对称影响
DOI：
10.1016/j.foreco.2020.118396
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发表时间：
2020
影响因子：
3.7
通讯作者：
Yi Xianfeng
中科院分区：
文献类型：
--
作者：
Yu Fei;Wei Shanshan;Wang Yang;Li Yingchen;Ma Jianmin;Zhang Lixia;Yi Xianfeng
同域树种的异步播种可以影响种子传播，但目前还不清楚种子的相对丰度可能会影响间接的种子传播媒介介导的种子-种子相互作用。本文研究了秦岭东部两个同域树种（栓皮栎和华山松）在异步桅杆事件下种子丰度的变化对种子扩散的影响。虽然种子的移除和消耗受到种子丰度和种子种类的影响，但种子缓存仅取决于物种，即，Q.结果表明，变异种子比P.不管种子的丰度。散贮P.华山松种子依赖于Q.变异无论种子丰度，Q。variabilisacorn比P.阿曼德种子我们的研究结果共同表明，间接种子种子传播介导的种子传播种子相互作用的生态效应是不对称的，并可能受到种子丰度以及种子物种（或种子性状）。我们建议未来的研究重点放在多个物种之间的间接种子种子相互作用与对比种子性状，以更好地了解它们如何影响种子传播，植物再生和动态。
Asynchronous mast seeding of sympatric tree species can affect seed dispersal, but it is not clear how the relative abundances of seeds might influence indirect seed–seed interaction mediated by seed dispersal agents. In this study, we investigated how seed abundance variations of the two sympatric tree species (Quercus variabilisandPinus armandii) with asynchronous masting events influenced seed dispersal in the eastern Qinling Mountains, China. Although seed removal and seed consumption were influenced by both seed abundance and seed species, seed caching was only species-dependent, i.e.,Q. variabilisacorns were more likely to be cached thanP. armandiiseeds irrespective of seed abundance. The proportion of scatter-hoardedP. armandiiseeds depended on the abundance ofQ. variabilisacorns. Regardless of seed abundance,Q. variabilisacorns were dispersed further thanP. armandiiseeds. Our results collectively indicate that the ecological effects of indirect seed–seed interaction mediated by seed dispersers on seed dispersal are asymmetrical and are potentially regulated by seed abundance as well as seed species (or seed traits). We recommend future studies focus on indirect seed–seed interactions among multiple species with contrasting seed traits, to better understand how they influence seed dispersal, plant regeneration and dynamics.