Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 0844780 |
| Individual function and community processes in desert annuals | |
| D. Lawrence Venable | |
| 主持机构 | University of Arizona |
| 开始日期 | 2009-08-01 |
| 结束日期 | 2013-09-30 |
| 资助经费 | 575000(USD) |
| 项目类别 | Standard Grant |
| 资助机构 | US-NSF（美国国家科学基金会） |
| 项目所属计划 | POP & COMMUNITY ECOL PROG, Cross-BIO Activities |
| 语种 | 英语 |
| 国家 | 美国 |
| 英文简介 | This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This project will investigate the physiology of Sonoran Desert winter annual plants in order to provide insights into their population and community dynamics and the mechanisms that allow species to coexist at high diversity. Annual plants are a major component of arid land, where precipitation is both low and highly variable. Plants respond differently to this variability in a manner that contributes to species coexistence. Species trade off maximal growth rate for efficient water use in different ways, resulting in distinct population dynamics. It has been shown that the species of this community that efficiently use water have lower temperature optima for photosynthesis. The goal for this proposal is to determine how variation in temperature optima and water use efficiency results in differences in population dynamics. A combination of natural observations, field and lab experiments and models of population dynamics will be used to determine if species are specializing to photosynthesize during different parts of the daily, storm front or seasonal cycle. Field experiments will manipulate precipitation pulse sizes and seasonal timing and the differential responses of species will be measured. The data will be used to forecast species-specific responses to changes in temperature and precipitation. This work will provide a unique framework for understanding how differences in physiology lead to important community properties: species coexistence and diversity. A more mechanistic community ecology and more ecologically grounded physiology will increase our understanding of how natural systems adapt to changing environments. This research will combine research and education in ways that train the ecological scientist of tomorrow. Undergraduate, graduate and postdoctoral students will gain hands-on scientific training. A graduate student will develop an educational kiosk that the hundreds of thousands of visitors to the University of Arizona's Biosphere 2 will interact with. Women and underrepresented ethnic and cultural groups will be encouraged to participate in this research in various ways including working with minority access programs on campus. The understanding gained from this work will have applications for resource management of desert systems in response to a changing climate. |
| 来源学科分类 | Biological Sciences |
| URL | https://www.nsf.gov/awardsearch/showAward?AWD_ID=0844780 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/341435 |
| 推荐引用方式 GB/T 7714 | D. Lawrence Venable.Individual function and community processes in desert annuals.2009. |
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