Collaborative Research, LTREB - Long-term studies of flowering, fruiting and seedling recruitment in Neotropical forests: global change, climate variability and species coexistence

合作研究，LTREB - 新热带森林开花、结果和幼苗补充的长期研究：全球变化、气候变化和物种共存

• 批准号: 0614055
• 负责人: Jennifer Powers
• 金额: $ 2.95万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0614055&HistoricalAwards=false
• 关键词: Collaborative; Research; LTREB; Long; term

ABSTRACTWhile, tropical forests support perhaps 60% of all flowering plant species and 50% of all terrestrial NPP and carbon stored in terrestrial biomass, few long-term studies of tropical forests have been conducted, particularly studies of factors affecting flowering, seed production and seedling establishment, growth and mortality. Knowledge of the forces that maintain diversity during the reproduction and regeneration life history stages is critical to understanding and maintaining tropical forest diversity. The absence of long-term, quantitative studies of reproduction and early regeneration of tropical forest plants has made it difficult to identify relationships with natural climate variation as well as possible long-term trends caused by anthropogenic forcing. The research will maintain long-term quantitative studies of plant reproduction and seedling establishment in three Neotropical forests varying in disturbance regime, seasonality and diversity. Ecuador, Panama and Puerto Rico vary in the influence of climatic forcing by the El Nino Southern Oscillation, the North Atlantic Oscillation, hurricane disturbance and the potential effect of anthropogenic global change. These data on temporal and spatial patterns of seed rain and seedling recruitment allow tests of hypotheses concerning causes of interannual variation and roles of different mechanisms in facilitating species coexistence including recruitment limitation, competition-colonization trade-offs, density-dependence and regeneration niche differentiation; all mechanisms hypothesized to be important to species coexistence and forest dynamics. This LTREB project will support the training of undergraduate and graduate students, provide new data to the scientific community, and inform the general public on the importance of global change research. Publishing all data and associated analyses on a web site here will insure maximum societal benefit from the data collected.

抽象的同时，热带森林可能支持所有开花植物物种中的60％，以及陆地生物量中存储的所有陆地NPP和碳的50％，对热带森林的长期研究很少，尤其是对影响开花，种子生产和幼苗建立，生长和死亡率的因素的研究。了解在繁殖和再生生活历史阶段保持多样性的力量对于理解和维持热带森林多样性至关重要。缺乏对热带森林植物的繁殖和早期再生的长期定量研究，因此很难确定与自然气候变化的关系，以及由人为强迫引起的长期趋势。该研究将在三个新热带森林中进行植物繁殖和幼苗建立的长期定量研究，这些森林在干扰状态，季节性和多样性方面有所不同。 厄瓜多尔，巴拿马和波多黎各在气候强迫的影响下，埃尔尼诺南部振荡，北大西洋振荡，飓风干扰以及人为全球变化的潜在影响。这些有关种子雨和幼苗募集的时间和空间模式的数据，可以测试有关跨年间变化的原因以及不同机制在促进物种共存中的作用的原因，包括招募限制，竞争 - 殖民化权衡，密度依赖性和再生niche Niche分化；所有的机制假设对物种共存和森林动态很重要。该LTREB项目将支持对本科生和研究生的培训，向科学界提供新数据，并向公众告知全球变化研究的重要性。在此处的网站上发布所有数据和相关分析将确保从收集的数据中获得最大的社会收益。