啮齿动物及凋落物存留对天山野果林野生樱桃李种子命运的影响

应用生态学报

啮齿动物及凋落物存留对天山野果林野生樱桃李种子命运的影响

赵玉^1,2,刘影¹,王建明¹,张永恒¹,杨允菲^2**

(¹伊犁师范学院化学与生物科学学院/新疆维吾尔自治区高校天然产物化学与应用重点实验室, 新疆伊宁 835000; ^2东北师范大学草地科学研究所植被生态科学教育部重点实验室, 长春 130024)

出版日期:2014-09-18 发布日期:2014-09-18

Effects of rodents and litter coverage on the seed fate of wild Prunus divaricata in wild fruit forest of Tianshan Mountain, Northwest China.

ZHAO Yu^1,2, LIU Ying¹, WANG Jian-ming¹, ZHANG Yong-heng¹, YANG Yun-fei^2

(¹School of Chemistry and Bioscience, Yili Normal University/ Key Laboratory of Natural Product Chemistry and Application, Colleges & Universities under the Department of Education of Xinjiang Uygur Autonomous Region, Yining 835000, Xingjiang, China; ^2Ministry of Education Key Laboratory of Vegetation Ecology, Institute of Grassland Science, Northeast Normal University, Changchun 130024, China)

Online:2014-09-18 Published:2014-09-18

摘要/Abstract

摘要：

2010年9月至2013年4月通过设置人工土壤种子库,研究了野生樱桃李土壤种子库的动态及啮齿动物和凋落物覆盖对种子库中种子命运的影响.结果表明: 在有取食动物扰动下,48.3%的种子萌发输出为幼苗,50%的种子被动物搬运或当场取食,4%的种子腐烂.在排除了取食动物干扰的条件下,樱桃李种子形成了短期持久的土壤种子库,3年后依然有部分种子萌发并输出为幼苗.凋落物覆盖和对照处理中,被搬运和当场取食种子的比例均显著低于清除凋落物的裸地.地表凋落物存留能减少动物搬运、取食,但不足以导致新生幼苗的大量出现,而啮齿类动物的搬运或取食是影响野生樱桃李种子命运和种子库动态的主要因素.

Abstract:

The dynamic variation characteristics of seed bank and the main factors influencing the fate of Prunus divaricata seeds under the pressure of rodent predation and litter coverage were investigated with artificial soil seed banks from September, 2010 to April, 2013. It was found that there was about 48.3% of seeds germinated under the rodent predation disturbance conditions, 50% of the seeds was predated in situ or removed, and only about 4% decayed. The artificial seed bank formed a shortterm persistent soil seed bank without any rodent predation disturbance, and the seeds could germinate even though they had been stored in the seed bank for three years. Soil burial provided a lower predation pressure and promoted the recruitment of wild P. divaricata seedlings, removal and predation in situ by animals was an important factor affecting the fate of seeds. At the same time, seeds removed and foraged in situ in the control and litter coverage samples were significantly less than that in the bare soil samples. Ground coverage reduced the removal and predation of seeds by rodents, but the effect was not enough to result in more seedlings. Rodent predation and removal were the main factors that could affect the seed fate and dynamics of seed bank.

赵玉1,2,刘影1,王建明1,张永恒1,杨允菲2**. 啮齿动物及凋落物存留对天山野果林野生樱桃李种子命运的影响[J]. 应用生态学报.

ZHAO Yu1,2, LIU Ying1, WANG Jian-ming1, ZHANG Yong-heng1, YANG Yun-fei2. Effects of rodents and litter coverage on the seed fate of wild Prunus divaricata in wild fruit forest of Tianshan Mountain, Northwest China.[J]. Chinese Journal of Applied Ecology.