U.S.-Brazil Dissertation Enhancement: Effect of Habitat Fragmentation on the Reproduction and Population Dynamics of a Neotropical Herb (Heliconia Acuminata)

9806351 Harrison 该美国-巴西奖项将支持一项论文强化项目，该项目涉及加州大学戴维斯分校的 Emilio M. Bruna 先生，并由 Harrison 博士监督。苏珊·哈里森和莎朗·Y·施特劳斯。 该项目的标题是“栖息地破碎化对新热带草本植物（Heliconia acuminata）繁殖和种群动态的影响”。实地考察将在由史密森学会和国家亚马逊研究所 (INPA) 管理的森林碎片生物动力学项目 (BDFP) 中进行。 BDFFP 是一个大型实验项目，专门用于研究热带地区碎片化的影响。 布鲁纳先生将检验以下假设：观察到的新热带草本植物 Heliconia acuminata 栖息地碎片中密度降低的模式是由于授粉、种子生产和幼苗建立水平降低而导致栖息地碎片中种群增长率较低的结果。他将通过一系列操作性实验来确定 H. acuminata 的繁殖成功率如何以及为何变化，通过监测连续森林和栖息地碎片中的长期人口统计图，并将这些数据纳入矩阵模型来预测种群动态，以此来测试这一点。 ***

9806351 Harrison This U.S.-Brazil award will support a dissertation enhancement project involving Mr. Emilio M. Bruna of the University of California, Davis, under the supervision of Drs. Susan Harrison and Sharon Y. Strauss. The title of this project is "Effect of Habitat Fragmentation on the Reproduction and Population Dynamics of a Neotropical Herb (Heliconia acuminata)." Fieldwork will be done at the Biological Dynamics of Forest Fragments Project (BDFFP), administered by the Smithsonian Institution and the National Institute of Amazonian Research (INPA). The BDFFP is a large scale, experimental project designed specifically to study the effects of fragmentation in the tropics. Mr. Bruna will test the hypothesis that an observed pattern of reduced density in habitat fragments of the neotropical herb Heliconia acuminata is the result of lower population growth rate in habitat fragments, due to reduced levels of pollination, seed production, and seedling establishment. He will test this by determining, via a series of manipulative experiments, how and why reproductive success in H. acuminata varies, by monitoring long-term demographic plots in continuous forest and habitat fragments and, by incorporating these data into a matrix model to predict population dynamics. ***