Can Insect Herbivory Control Grassland Composition, Productivity and Dynamics: An Alternative View
昆虫食草动物能否控制草地组成、生产力和动态:另一种观点
基本信息
- 批准号:9615184
- 负责人:
- 金额:$ 30万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1997
- 资助国家:美国
- 起止时间:1997-04-15 至 2003-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
9615184 CARSON For more than 35 years evidence has accumulated that herbivorous insects will not harm native prairies and grasslands (with the exception of grasshoppers). New evidence suggests, however, that insect attack dramatically reduces the diversity and abundance of broad-leaved herbaceous plants, or forbs, that occur in North American prairies. Damage by certain insects may lead to less diverse prairies that are more susceptible to environmental perturbations. The goal of this research is to determine if damage by beetles, native specialist insect herbivores, control the distribution and abundance of three species of native, clonal goldenrods which form large, productive patches in the prairies of Minnesota. The investigators' hypothesis, based on work by Grover is that specialist insects, such as beetles, play a "keystone" role especially in infertile grasslands by reducing the abundance of dominant plant species. "Patch-centered" insect exclusion, transplant, and competition experiments will be conducted in native prairies in Minnesota to determine whether beetles reduce the abundance of goldenrods in natural grasslands. This work will help us understand how some plant species become rare or threatened by natural processes that are not strongly related to human activities. Furthermore, many of the most important agricultural crops are grasses (e.g., corn and wheat) and are plagued by weeds including a large number of forbs. Understanding and identifying those insects that damage forbs and not grasses could lead to a greater use of biological control agents (e.g., insects) to control weeds. This would ultimately reduce the use of expensive and potentially harmful herbicides.
卡森9615184 35年来,越来越多的证据表明,食草昆虫不会危害原生草原和草地(蝗虫除外)。 然而,新的证据表明,昆虫的袭击大大减少了北美大草原上阔叶草本植物或杂类草的多样性和丰富度。 某些昆虫的破坏可能导致草原的多样性减少,更容易受到环境扰动的影响。 本研究的目的是确定是否损害甲虫,本地专业昆虫食草动物,控制分布和丰富的三种本地,克隆黄花,形成大,生产补丁在明尼苏达州的大草原。 研究人员基于Grover的工作提出的假设是,甲虫等专业昆虫通过减少优势植物物种的丰度,特别是在贫瘠的草原上发挥着“关键”作用。 “斑块为中心”的昆虫排斥,移植和竞争实验将在明尼苏达州的原生草原进行,以确定甲虫是否减少了天然草原上的黄花菜的丰度。 这项工作将帮助我们了解一些植物物种是如何变得稀有或受到与人类活动没有密切关系的自然过程的威胁。 此外,许多最重要的农作物是草(例如,玉米和小麦),并受到包括大量杂类草在内的杂草的困扰。 了解和识别那些损害杂类而不是草的昆虫可能会导致更多地使用生物控制剂(例如, 昆虫)来控制杂草。 这将最终减少昂贵且可能有害的除草剂的使用。
项目成果
期刊论文数量(0)
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科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Walter Carson其他文献
Walter Carson的其他文献
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{{ truncateString('Walter Carson', 18)}}的其他基金
DISSERTATION RESEARCH: A Unified Explanation for Dominance and Relative Abundance: Integrating Competition Theory, Predation Theory, and Community Complexity
论文研究:支配地位和相对丰富性的统一解释:整合竞争理论、掠夺理论和群落复杂性
- 批准号:
0508012 - 财政年份:2005
- 资助金额:
$ 30万 - 项目类别:
Standard Grant
DISSERTATION RESEARCH: The Application of Resource Competition Theory to Invasive Species and Biological Control
论文研究:资源竞争理论在入侵物种与生物防治中的应用
- 批准号:
0308788 - 财政年份:2003
- 资助金额:
$ 30万 - 项目类别:
Standard Grant
LTREB: On the Consequences of Removing Ground-dwelling Mammals for Tropical Forest Diversity: Towards a New Conceptual Framework
LTREB:关于消除地面哺乳动物对热带森林多样性的影响:迈向新的概念框架
- 批准号:
0212054 - 财政年份:2002
- 资助金额:
$ 30万 - 项目类别:
Continuing Grant
The Paradox of Enrichment in Plant Assemblages: Tests of Three Prominent Hypotheses
植物组合富集的悖论:三个重要假设的检验
- 批准号:
9903912 - 财政年份:1999
- 资助金额:
$ 30万 - 项目类别:
Standard Grant
LTREB: The Long-Term Effects of Removing Insects and Ground-Dwelling Mammals on Tropical Tree Diversity: A Community Level Experimental Test
LTREB:清除昆虫和地面哺乳动物对热带树木多样性的长期影响:群落水平实验测试
- 批准号:
9527729 - 财政年份:1996
- 资助金额:
$ 30万 - 项目类别:
Standard Grant
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