| 项目编号: | 1456520
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| 项目名称: | Theory and application of medium-term successional dynamics in secondary tropical forest |
| 作者: | Karen Holl
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| 承担单位: | University of California-Santa Cruz
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| 批准年: | 2014
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| 开始日期: | 2015-06-01
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| 结束日期: | 2020-05-31
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| 资助金额: | USD318904
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| 资助来源: | US-NSF
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| 项目类别: | Continuing grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Biological Sciences - Environmental Biology
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| 英文关键词: | tropical forest recovery
; study
; natural forest recovery
; different forest restoration approach
; mid-stage forest recovery
; tropical forest restoration
; forest seedling
; forest recovery
; site
; forest succession
; forest cover
; remnant forest patch
; tropical forest restoration strategy
; insect community dynamics
; reference forest
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| 英文摘要: | There is a growing need to restore extensive areas of degraded habitat in tropical areas to forest in order to conserve biodiversity, mitigate the impacts of climate change (through carbon sequestration), reduce erosion and loss of topsoil, and provide for human livelihoods, yet little is known about how well tropical forest restoration strategies work beyond the first few years of establishment. This long-term experiment aims to address two key questions about tropical forest recovery. First, the research compares natural forest recovery to two different forest restoration approaches (a low and high intensity approach) to assess how the degree of human intervention affects the rate of tropical forest recovery. Second, the study evaluates the importance of the proximity of restored sites to remnant forest patches, which can serve as a source for colonizing plants and animals. Results of this study will provide critical guidance to land managers and policy makers on how to most effectively invest limited resources to improve the outcomes of the millions of hectares of tropical forest restoration being undertaken globally. The study will provide training for graduate and undergraduate students, and new inquiry-based learning program will actively engage high school students in the research.
Over a decade ago, 13 experimental sites were established over a 100 square kilometer area in southern Costa Rica, each site with a range of surrounding forest cover. Each site has three experimental treatments: 1. no tree planting and natural recovery; 2. planting tree islands of three sizes (low intensity); and 3. planting the entire plot with trees (high intensity). Researchers will collect data on metrics to assess the next phase of forest succession, including measuring soil nutrients, local microclimate, seed dispersal, tree growth, and the establishment and survival of forest seedlings. In addition, plots will be used by collaborating scientists to study other facets of forest recovery such as insect community dynamics, and bird and bat behavior. The data will be used to address several questions about mid-stage forest recovery and how the pattern of recovery can change over time including: the effect of restoration interventions on within- and across-site biodiversity; the degree to which manipulations of initial conditions result in convergent or divergent successional trajectories from reference forest; and the relative importance of local- versus landscape-scale processes on forest recovery. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94567
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Karen Holl. Theory and application of medium-term successional dynamics in secondary tropical forest. 2014-01-01.
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