Regulation of Water Use by Rhododendron maximum on an Elevation Gradient at Coweeta (LTER)

Coweeta (LTER) 海拔梯度上杜鹃花最大用水量的调节

• 批准号: 9407129
• 负责人: Erik Nilsen
• 金额: $ 10万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-01 至 1996-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9407129&HistoricalAwards=false
• 关键词: Regulation; Water; Use; Rhododendron; maximum

9407129 Nilsen Regulation of Seasonal and Spatial Water Use by R. maximum at Two Elevations at Coweeta (LTER) The understory of the Appalachian forest is dominated by two ericaceous shrubs Kalmia latifolia and Rhododendron maximum. In particular, R. maximum covers over half a million hectares of southern Appalachian forest. Dense thickets of this species, called "slicks", inhibit the growth of canopy trees. These dense growths are often close to streams making R. maximum a keystone species in the interface between terrestrial and aquatic ecosystems of the southern Appalachian mountains. Although R. maximum must have a significant impact on several ecosystem processes, the "role" of R. maximum in functions of the Appalachian forest have been only rarely studied. The influence of R. maximum on ecosystem hydrology may be one of the important impacts of this species on the Appalachian forest system. The objectives of this proposal are: 1. to determine the factors that regulate water use patterns in R. maximum; 2. to develop mathematical functions that predict water use patterns from environmental conditions; 3. to collect evidence for possible competition for water between R. maximum and an important canopy species. Experiments are designed to fit into the currently funded research program at the LTER site at Coweeta Hydrological Laboratory. Results from this proposal will clarify the importance of R. maximum in the ecosystem water budget for the regulation mechanisms therefore for R. maximum water use, and determine if competition for water between this important understory species and a canopy dominant species is likely. ***

9407129尼尔森对季节性和空间用水的调节R.在Coweeta（lter）的两个高程中，阿巴拉契亚森林的植被以两种Ericaceous灌木为主导，由两种Ericaceous灌木kalmia latifolia和Rhododendron Mimartal。尤其是R.最高覆盖了阿巴拉契亚南部森林的半百万公顷。该物种的致密灌木丛，称为“湿润”，抑制了冠层树的生长。这些茂密的生长通常接近溪流，使R。最大的孔子物种在阿巴拉契亚南部山脉的陆地生态系统之间的界面中。尽管R.最大值必须对几个生态系统过程产生重大影响，但R.最大值在阿巴拉契亚森林功能中的“作用”很少被研究。 R.最大值对生态系统水文学的影响可能是该物种对阿巴拉契亚森林系统的重要影响之一。该提案的目标是：1。确定R. MAVIEM中调节用水模式的因素； 2。开发数学功能，以预测环境条件的用水模式； 3。收集R.最大和重要的冠层物种之间可能竞争水的证据。实验旨在适合Coweeta水文实验室的LTER网站当前资助的研究计划。该提案的结果将阐明R.最大值在生态系统水预算中对调节机制的重要性。 ***