Effects of selective logging on rodent-mediated seed dispersal
Effects of selective logging on rodent-mediated seed dispersal
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选择性伐木对啮齿动物介导的种子传播的影响
DOI：
10.1016/j.foreco.2017.10.001
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发表时间：
2017-12
影响因子：
3.7
通讯作者：
Ma Jianmin
中科院分区：
文献类型：
--
作者：
Yu Fei;Shi Xiaoxiao;Zhang Xue;Yi Xianfeng;Wang Dexiang;Ma Jianmin
人们普遍认为，选择性采伐显着影响植被覆盖度和栖息地结构，但很少有人知道低强度选择性采伐是否以及如何影响种子传播介导的小型啮齿动物。本文比较了不同生境条件下锐齿栎种子传播媒介的组成、数量、初次和二次种子传播以及捕食作用的差异。acuteserrata由分散囤积啮齿动物在不同年龄的森林（即，本文对秦岭火地塘林区未采伐林分、低强度采伐后第二年和第五年的林分进行了研究。我们发现，啮齿动物组成的立场，在第二年伐木后（大体分散大鲵缺席）显着不同，从其他两个立场。择伐后第二年，啮齿动物的数量、种子清除率、散藏比例和种子扩散距离均降低。然而，没有显着差异，发现在组成和丰富的啮齿动物，以及它们的种子传播服务之间的未登录的立场，并在登录后的第五年。此外，采伐后第二年林分的橡子初埋比例显著低于其他两种林分，但种子贮藏后，采伐后第二年林分的种子重访率显著低于其他两种林分。啮齿动物介导的种子传播在选择性采伐后的第二年较低，但在五年内恢复到初始水平。采伐后第二年林分中的扩散距离（3.12 ± 0.23 m）显著低于未采伐林分中的扩散距离（5.75 ± 0.41 m）和采伐后第五年林分中的扩散距离（4.44 ± 0.36 m）。因此，森林中的选择性采伐可能会暂时改变啮齿动物群落的组成，改变种子传播服务和植物运动的能力。选择性采伐后的年数对于确定种子是否被潜在的扩散者迅速带走是重要的，这可能导致不同的种子带走率、种子捕食率、散布囤积率和存活率，并最终影响选择性采伐后的森林恢复。
It is generally accepted that selective logging significantly influences the vegetation coverage and habitat structures, but little is known about whether and how low intensity selective logging affects seed dispersal mediated by small rodents. In this study, we compared the differences in seed disperser composition and abundance as well as primary and secondary seed dispersal and predation of Quercus aliena var. acuteserrata by scatter-hoarding rodents in different aged forest (i.e., unlogged stands, stands in the second and fifth year after low intensity logging 150 stems per ha) in Huoditang Forest in the Qinling Mountains, China. We found that the rodent composition of stands in the second year after logging (large-bodied disperser Sciurotamias davidianus was absent) differed conspicuously from that of the other two stands. Selective logging reduced the abundance of.rodents, seed removal rate, scatter–hoarded proportion, and seed dispersal distance during the second year after selective logging. However, no significant differences were found in the composition and abundance of rodents as well as their seed dispersal services between the unlogged stands and in stands during the fifth year after logging. In addition, the proportions of initially buried acorns were significantly lower in stands in the second.year after logging compared with the other two types of stands, but after seed caching, the seed revisiting rates were lower in stands in the second year after logging compared with the other two types of stands. Rodent–mediated seed dispersal was lower in the second year after selective logging but it recovered to its initial level within five years. The dispersal distance was significantly lower in stands in the second year after logging compared with the distances (3.12 ± 0.23 m) in the unlogged forest stands (5.75 ± 0.41 m) and in stands in the fifth year after logging (4.44 ± 0.36 m). Therefore, selective logging in forests is likely to temporarily alter the composition of rodent communities, change seed dispersal services, and the capacity for plant movements. Number of years after selective logging is important for determining whether seeds are removed rapidly by.potential dispersers, which can lead to different rates of seed removal, seed predation, scatter–hoarding, and survival, and eventually influence forest recovery after selective logging.
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