SGER: Climatically Induced Nonequilibria Determine Temporal Metacommunity Dynamics

SGER：气候引起的非平衡决定时间元群落动态

• 批准号: 0535939
• 负责人: Richard Stevens
• 金额: $ 6.5万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0535939&HistoricalAwards=false
• 关键词: SGER; Climatically; Induced; Nonequilibria; Determine

During the winter of 2005, centuries long records of precipitation were broken in southern California. This represents an urgent, once in a lifetime opportunity to measure the effects of a large natural increase in desert productivity on the community organization of desert rodents. Moreover, such a timely event can be used to integrate the well-studied rodent communities of southwestern deserts with a new paradigm in community ecology, the metacommunity concept. Metacommunity structure describes regional level characteristics of local animal communities, which should vary in predictable ways as the period of high producivity is followed by a return to the relative low productivity that characterizes desert ecosystems. Predictions will be examined in the Mojave National Preserve with an initial characterization of the structure of 30 rodent communities throughout the preserve. Each community will be sampled twice under proposed funding and future funding will be pursued for continued monitoring of metacommunity structure. A suite of statistical analyses will decompose variation in species composition into local (species environment interactions) and regional (dispersal effects) influences, which will provide a test of the predictions of the metacommunity concept.

2005年冬天，加州南部打破了几个世纪以来的降水记录。 这代表了一个紧迫的，一生一次的机会来衡量沙漠生产力的大规模自然增长对沙漠啮齿动物社区组织的影响。 此外，这样一个及时的事件可以用来整合西南沙漠的啮齿动物群落与一个新的范例，在社区生态学，metacromitality概念。 元生态系统结构描述了当地动物群落的区域水平特征，这些特征应该以可预测的方式变化，因为高生产力时期之后是沙漠生态系统特征的相对低生产力的回归。 预测将在莫哈韦国家保护区进行检查，并对整个保护区的30个啮齿动物群落的结构进行初步表征。 每个社区将在拟议的资金下抽样两次，未来的资金将用于继续监测元生态系统结构。 一套统计分析将物种组成的变化分解为当地（物种环境相互作用）和区域（扩散效应）的影响，这将提供一个测试的metacompatibility概念的预测。