CRB: Collaborative Research: Comparing Genetic and Demographic Models of Population Viability for a Neotropical Parrot
CRB:合作研究:比较新热带鹦鹉种群活力的遗传和人口统计模型
基本信息
- 批准号:9503194
- 负责人:
- 金额:$ 6.88万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1995
- 资助国家:美国
- 起止时间:1995-10-01 至 1997-09-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
9503194 Beissenger One of the central problems in conservation biology is determining the viability of small populations. Population viability is dependent on complex interactions of demographic and genetic factors. Over the short term demographic variation induced by the environment seems to be the most important of these factors. Over the long term the genetic consequences of small population size become increasingly important. Both genetic and demographic methods are used to assess population viability. Genetic assessments of population viability focus on effective population size. The effective size is the size of an idealized population in which the random processes of inbreeding and drift act at the same rate as they do in the study population. Many guidelines for conservation state the number of individuals that should be saved in terms of effective size. Yet, in almost every wild population, effective size is much smaller than actual population size. Demographic assessments result from population viability assessment (PVA) models of persistence. In PVA models, populations are projected into the future using means and variances of demographic parameters: annual reproductive success and survivorship for different age or stage classes. This conservation and restoration biology project will compare genetic and demographic approaches to viability assessment based on studies of a Neotropical parrot, the Green-rumped Parrotlet in Venezuela. In addition, this research will develop a demographic model of population persistence for this species of parrot. The use of PVA and other demographic models is a cornerstone in conservation biology, yet the methods have rarely been tested and verified on small populations of neotropical birds.
9503194 Beissenger保护生物学的核心问题之一是确定小种群的生存能力。种群生存能力取决于人口统计学和遗传因素的复杂相互作用。在短期内,环境引起的人口变化似乎是这些因素中最重要的。从长远来看,小种群规模的遗传后果变得越来越重要。遗传学和人口统计学方法都用于评估种群生存能力。种群生存力的遗传评估侧重于有效种群规模。有效大小是一个理想化群体的大小,其中近亲繁殖和漂移的随机过程以与研究群体相同的速率起作用。许多保护准则都规定了应该根据有效大小保存的个体数量。然而,在几乎每一个野生种群中,有效规模都比实际种群规模小得多。人口统计学评估结果来自种群生存力评估(PVA)模型的持久性。在PVA模型中,使用人口统计参数的均值和方差来预测未来的人口:不同年龄或阶段类别的年度繁殖成功率和存活率。这一保护和恢复生物学项目将比较遗传和人口统计方法,以根据对委内瑞拉新热带鹦鹉绿腰鹦鹉的研究进行可行性评估。此外,这项研究将开发一个人口模型的人口持久性,这种鹦鹉。PVA和其他人口模型的使用是保护生物学的基石,但这些方法很少在新热带区鸟类的小种群上进行测试和验证。
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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Steven Beissinger其他文献
Steven Beissinger的其他文献
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{{ truncateString('Steven Beissinger', 18)}}的其他基金
OPUS:CRS: Global Change and California Birds and Mammals Across Centuries - The Grinnell Resurvey Project
OPUS:CRS:几个世纪以来的全球变化与加州鸟类和哺乳动物 - 格林内尔再调查项目
- 批准号:
1911334 - 财政年份:2019
- 资助金额:
$ 6.88万 - 项目类别:
Standard Grant
Dissertation Research: Future changes in California bird communities projected from century-scale resurveys
论文研究:根据百年规模的重新调查预测加州鸟类群落的未来变化
- 批准号:
1601523 - 财政年份:2016
- 资助金额:
$ 6.88万 - 项目类别:
Standard Grant
Collaborative Research: Responses of Desert Endotherms to Rapid Recent Climate Change
合作研究:沙漠吸热植物对近期气候快速变化的反应
- 批准号:
1457742 - 财政年份:2015
- 资助金额:
$ 6.88万 - 项目类别:
Standard Grant
DISSERTATION RESEARCH: Making the transition: Comparing avian biogeographic responses to climate change across biomes
论文研究:转型:比较不同生物群落鸟类生物地理对气候变化的反应
- 批准号:
1501757 - 财政年份:2015
- 资助金额:
$ 6.88万 - 项目类别:
Standard Grant
CNH: Wetlands in a Working Landscape: Links Among Landowner Decisions, Climate, Disease Ecology, and Metapopulation Dynamics
CNH:工作景观中的湿地:土地所有者决策、气候、疾病生态学和种群动态之间的联系
- 批准号:
1115069 - 财政年份:2011
- 资助金额:
$ 6.88万 - 项目类别:
Standard Grant
Turnover Dynamics in Two Patch-Tracking Sympatric Rail Metapopulations: Validating Inferences from Occupancy Data
两个补丁跟踪同域铁路元群体中的周转动态:验证从占用数据得出的推论
- 批准号:
1051342 - 财政年份:2011
- 资助金额:
$ 6.88万 - 项目类别:
Continuing Grant
Microbial Infection, Egg Viability, and the Onset of Incubation in Birds
鸟类的微生物感染、卵子活力和孵化开始
- 批准号:
0517549 - 财政年份:2005
- 资助金额:
$ 6.88万 - 项目类别:
Continuing Grant
LTREB: Linking Individual and Spatial Variation to Demography and Population Dynamics of a Neotropical Parrotlet
LTREB:将个体和空间变异与新热带鹦鹉的人口统计和种群动态联系起来
- 批准号:
0113173 - 财政年份:2001
- 资助金额:
$ 6.88万 - 项目类别:
Continuing Grant
"Does Egg Viability Constrain the Onset of Incubation in Birds? An Experimental Analysis using a Tropical Climate Gradient"
“卵子活力是否会限制鸟类孵化的开始?使用热带气候梯度的实验分析”
- 批准号:
9904754 - 财政年份:2000
- 资助金额:
$ 6.88万 - 项目类别:
Continuing Grant
Function of Early Incubation: Tests of Social and Environmental Constraints
早期孵化的功能:社会和环境约束的测试
- 批准号:
9796155 - 财政年份:1997
- 资助金额:
$ 6.88万 - 项目类别:
Standard Grant
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CRB: Collaborative Research: The Direct and Indirect Effects of Biological Invasions on Biodiversity in New England Kelp Beds
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CRB: Collaborative Research: Comparing Genetic and Demographic Models of Population Viability for a Neotropical Parrot
CRB:合作研究:比较新热带鹦鹉种群活力的遗传和人口统计模型
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CRB: Collaborative Research: Comparing Genetic and Demographic Models of Population Viability for a Neotropical Parrot
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