Effects of dung presence, dung amount and secondary dispersal by dung beetles on the fate of Micropholis guyanensis (Sapotaceae) seeds in Central Amazonia
Effects of dung presence, dung amount and secondary dispersal by dung beetles on the fate of Micropholis guyanensis (Sapotaceae) seeds in Central Amazonia
复制标题
粪便存在、粪便数量和粪甲虫二次传播对亚马逊流域中部Micropholis Guyanensis（山楂科）种子命运的影响
DOI：
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发表时间：
2001
影响因子：
1.4
通讯作者：
E. Andresen
中科院分区：
文献类型：
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作者：
E. Andresen
种子命运的研究对于理解果实-食果动物的相互作用至关重要。一个因素，可以大大影响的命运，通过哺乳动物的粪便传播的种子，是粪便伴随着种子。粪便吸引了蜣螂和啮齿动物;前者吃并埋葬粪便，后者以种子为食。在这项研究中，命运的Micropholis guyanensis subsp。用无粪和5、10和25 g吼猴粪包围圭亚那种，直到幼苗建立。测量了蜣螂掩埋种子的深度，并确定了掩埋深度对出苗的影响。虽然最初的种子命运不同的治疗，相同的百分比的幼苗建立从种子没有粪便材料，并从种子与5，10和25克的粪便。然而，一个显着更高的比例建立从埋种子相比，种子留在表面上。在控制发芽实验中，随着埋深的增加，幼苗的建立率显着下降。在评价哺乳动物内寄生作用对热带植物种子传播生态学的影响时，应考虑蜣螂活动的影响。这些结果提供了进一步的证据，新兴的认识，种子传播和传播后的事件的研究是至关重要的植物再生的更完整的理解。
The study of seed fate is crucial for understanding fruit-frugivore interactions. One factor that can greatly influence the fate of seeds dispersed through mammal defecation, is the dung that accompanies the seeds. Dung attracts dung beetles and rodents; the former eat and bury dung, the latter feed on seeds. In this study the fate of Micropholis guyanensis subsp. guyanensis seeds surrounded by no dung and by 5, 10 and 25 g of howler monkey dung was followed until seedling establishment. The depths at which dung beetles bury the seeds were measured, and the effect of burial depth on seedling emergence was determined. Although initial seed fates differed among treatments, the same percentage of seedlings established from seeds without faecal material, and from seeds with 5, 10 and 25 g of dung. However, a significantly higher proportion of seedlings established from buried seeds when compared to seeds that remained on the surface. The percentage of seedlings establishing in a controlled germination experiment decreased significantly with increasing burial depth. The effect of dung beetle activity should be taken into consideration when assessing the role that mammal endozoochory plays on seed dispersal ecology of tropical plants. These results provide further evidence for the emerging realization that the study of secondary seed dispersal and post-dispersal events is crucial for a more complete understanding of plant regeneration.