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Closing the seed dispersal loop: quantitatively linking plant-frugivore interactions to the recruitment cycle of plant communities

关闭种子传播循环：将植物-食果动物相互作用与植物群落的补充周期定量联系起来

基本信息

批准号：
299242427
负责人：
Professorin Dr. Nina Farwig
金额：
--
依托单位：
Arbeitsgruppe Naturschutz
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2021-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/299242427?language=en
关键词：
Closing seed dispersal loop quantitatively

项目摘要

The ability to quantitatively link frugivore activity to later recruitment is the key to the understanding of seed dispersal processes and plant demography, especially in view of environmental impact factors such as forest degradation. However, owing to the high complexity of the cascade of seed dispersal and recruitment processes, establishing this link has so far largely been impossible. The proposed project aims at filling this gap by quantitatively linking plant-frugivore interactions to recruitment of associated plant populations in the light of forest degradation. To achieve this, we will use a novel molecular technique that determines the identity of seed dispersers from fecal material enclosing dispersed seeds. We will combine this approach with classic matrix population models based on empirical assessments of a fleshy-fruiting plant community in the field. This will allow us to track the impact of frugivore activity on recruitment of a plant community in logged and old-growth forest. Our study system is the Bialowieza Primeval Forest (BPF) in Eastern Poland, the last pristine forest ecosystem of the European lowland. The forest provides a unique reference site, as species communities and ecological processes have evolved nearly uninterrupted since the last ice age. The project builds on comprehensive datasets from our previous studies on interactions among frugivore and plant communities in BPF, which show a significant loss of interactions and partners in plant-frugivore interactions in logged compared to old-growth forest. By assessing the impact of dispersers through recruitment, our project will allow for unique insights into the consequences of the loss of seed disperser species in degraded forest habitats for population dynamics in plant communities.

能够定量地将食果动物的活动与以后的补充联系起来，是了解种子传播过程和植物人口统计的关键，特别是考虑到森林退化等环境影响因素。然而，由于种子传播和招募过程的高度复杂性，建立这一联系迄今基本上是不可能的。拟议项目的目的是根据森林退化情况，通过将植物-果食性相互作用与相关植物种群的招募进行定量联系来填补这一空白。为了实现这一点，我们将使用一种新的分子技术，从包裹分散种子的粪便材料中确定种子分散剂的身份。我们将把这种方法与经典的矩阵种群模型结合起来，该模型基于对田间肉质果实植物群落的经验评估。这将使我们能够跟踪果食活动对伐木和老树森林中植物群落招募的影响。我们的研究系统是波兰东部的Bialowieza原始森林(BPF)，这是欧洲低地最后一个原始森林生态系统。这片森林提供了一个独特的参考场所，因为自上一个冰河时代以来，物种群落和生态过程几乎没有中断过。该项目建立在我们之前关于BPF果食性动物和植物群落之间相互作用的综合数据集的基础上，这些研究表明，与古老的森林相比，伐木森林中植物-果食性动物相互作用中的相互作用和伙伴的显著损失。通过通过招募来评估散播者的影响，我们的项目将允许对退化森林生境中种子散播者物种的丧失对植物群落中种群动态的影响进行独特的洞察。