Historical contingency in ecology and restoration: climate change, year effects, and priority effects in California grasslands
生态学和恢复中的历史偶然性:加利福尼亚草原的气候变化、年份效应和优先效应
基本信息
- 批准号:1050543
- 负责人:
- 金额:$ 35.2万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2011
- 资助国家:美国
- 起止时间:2011-04-01 至 2017-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
There are two opposing models of how natural communities develop after disturbance. One theory predicts that community composition will tend to return to the pre-disturbance state, regardless of the vagaries of early establishment. Alternatively, it has been suggested that the species that make up communities are largely determined by the order of arrival of colonizers. The unresolved question is: Do different arrival times of species produce different stable communities in the long term, or do plant communities on similar sites eventually end up with similar compositions? This study seeks to answer this question while at the same time assessing whether interannual temporal variation affects the long-term outcome of these processes. Environmental variation across years (for example, variation in the amount and pattern of rainfall) can affect the results of experiments followed for multiple years, producing different results in different years. Similarly, rare climatic events may often drive long-term community structure. Despite this, most ecological studies are followed for only a single year, and the vast majority of ecological experiments are initiated in a single year. This multi-year research program will examine the plant community ecology of California grasslands, controlling for colonization order of plants in the context of year-to-year variation in rainfall.The research has practical implications for ecosystem restoration. These include developing techniques to increase species diversity on restoration projects, and improving the success of projects by focusing planting efforts on years with highest likelihood of success, decreasing the cost of restoration by decreasing replanting. This research will also test whether rare climatic events are more important for plant communities than gradual changes in average climate, with implications for how we respond to climate change. In addition, this project will enhance the long-term relationship between our lab and the Student and Landowner Education and Watershed Stewardship (SLEWS) program, which brings high school youth (often from disadvantaged groups) into rural settings to assist in restoration projects on local farms. This program benefits not only the students and the farmers, but also the graduate student mentors.
关于自然群落在受到干扰后如何发展,有两种相反的模式。一种理论预测,社区的组成将倾向于恢复到动乱前的状态,不管早期建立的变幻莫测。另一种说法是,组成群落的物种在很大程度上取决于殖民者到达的顺序。尚未解决的问题是:物种不同的到达时间是否会在长期内产生不同的稳定群落,或者相似地点的植物群落最终会有相似的组成?本研究试图回答这个问题,同时评估是否年际时间变化影响这些过程的长期结果。 不同年份的环境变化(例如降雨量和降雨模式的变化)可能会影响多年的实验结果,在不同年份产生不同的结果。同样,罕见的气候事件往往会推动长期的群落结构。尽管如此,大多数生态学研究只持续一年,绝大多数生态学实验也是在一年内开始的。这项为期多年的研究计划将考察加州草原的植物群落生态学,在降雨量逐年变化的背景下控制植物的定殖顺序。这项研究对生态系统恢复具有实际意义。其中包括开发技术来增加恢复项目的物种多样性,并通过将种植工作集中在成功可能性最高的年份来提高项目的成功率,通过减少重新种植来降低恢复成本。这项研究还将测试罕见的气候事件是否比平均气候的逐渐变化对植物群落更重要,并对我们如何应对气候变化产生影响。此外,该项目将加强我们的实验室与学生和土地所有者教育和流域管理(SLEWS)计划之间的长期关系,该计划将高中青年(通常来自弱势群体)带入农村环境,以协助当地农场的恢复项目。该项目不仅使学生和农民受益,而且使研究生导师受益。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Truman Young其他文献
Getting better with age: Lessons from the Kenya Long-term Exclosure Experiment (KLEE)
随着年龄的增长变得更好:肯尼亚长期排除实验(KLEE)的经验教训
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
Truman Young;C. Riginos;Duncan Kimuyu;K. Veblen;Lauren M. Porensky;Wilfred O Odadi;Ryan L. Sensenig - 通讯作者:
Ryan L. Sensenig
Truman Young的其他文献
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{{ truncateString('Truman Young', 18)}}的其他基金
LTREB: Stability and resilience in the face of multiple interacting press and pulse disturbances of a changing world (Kenya Long-term Exclosure Experiment: KLEE)
LTREB:面对不断变化的世界的多重相互作用的压力和脉冲干扰时的稳定性和弹性(肯尼亚长期排除实验:KLEE)
- 批准号:
1931224 - 财政年份:2020
- 资助金额:
$ 35.2万 - 项目类别:
Continuing Grant
RAPID: Historical contingency in ecology and restoration: environmental change, year effects, and priority effects in California grasslands
RAPID:生态学和恢复中的历史偶然性:加州草原的环境变化、年份效应和优先效应
- 批准号:
1745111 - 财政年份:2017
- 资助金额:
$ 35.2万 - 项目类别:
Standard Grant
LTREB RENEWAL: COLLABORATIVE RESEARCH: Scaling up and scaling out at the Kenya Long-term Exclosure Experiment (KLEE)
LTREB 更新:合作研究:肯尼亚长期排除实验 (KLEE) 的扩展和扩展
- 批准号:
1256034 - 财政年份:2013
- 资助金额:
$ 35.2万 - 项目类别:
Continuing Grant
DISSERTATION RESEARCH: When edges meet: Interacting edge effects in an African savanna
论文研究:当边缘相遇时:非洲稀树草原中相互作用的边缘效应
- 批准号:
0909539 - 财政年份:2009
- 资助金额:
$ 35.2万 - 项目类别:
Standard Grant
LTREB: KLEE- scaling up and out at the Kenya Long-term Exclosure Experiment
LTREB:KLEE - 肯尼亚长期排除实验的扩大和缩小
- 批准号:
0816453 - 财政年份:2008
- 资助金额:
$ 35.2万 - 项目类别:
Continuing Grant
Dissertation Research: Tree-grass Interactions in a Kenyan Savanna: the Effects of Wild and Domestic Herbivores
论文研究:肯尼亚稀树草原中的树与草的相互作用:野生和家养食草动物的影响
- 批准号:
0607970 - 财政年份:2006
- 资助金额:
$ 35.2万 - 项目类别:
Standard Grant
LTREB: KLEE (Kenya Long-term Exclosure Experiment): Pattern and Process in an African Savanna
LTREB:KLEE(肯尼亚长期排除实验):非洲稀树草原的模式和过程
- 批准号:
0316402 - 财政年份:2003
- 资助金额:
$ 35.2万 - 项目类别:
Continuing Grant
LTREB: Multi-species Herbivore Exclusion Experiment in a Semi-arid Landscape in Laikipia, Kenya
LTREB:肯尼亚莱基皮亚半干旱地区的多物种草食动物排除实验
- 批准号:
9726642 - 财政年份:1998
- 资助金额:
$ 35.2万 - 项目类别:
Standard Grant
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