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Combining bottom-up and top-down analyses to test fundamental concepts in invasion biology

结合自下而上和自上而下的分析来测试入侵生物学的基本概念

基本信息

批准号：
138179036
负责人：
Professor Dr. Jonathan Jeschke
金额：
--
依托单位：
Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/138179036?language=en
关键词：
Combining bottom up top down

项目摘要

Invasion biology investigates species that have been introduced to areas beyond their native range. Many of its fundamental concepts lack a firm empirical basis, e.g. the resistance hypothesis (which says that richer and less disturbed biota offer more resistance against invaders) or the enemy release hypothesis (which explains the success of invaders by their release from enemies, which are left behind in the native range). I propose to test these and other concepts by combining two approaches. First, I will create a global dataset of islands and continents with information on the number of animals and plants that were introduced to each of them, the number that established there, and the number that spread, separately for different taxonomic groups. The dataset will also provide information on the characteristics of the islands and continents (e.g. area, biodiversity, human population density). This top-down approach will provide a powerful test of the resistance hypothesis. Second, case studies of many individual invasion events exist, but this source of knowledge has not been used to investigate fundamental patterns in invasion biology. I propose to collectively analyze case studies and to compare the results of this bottom-up approach with those of top-down analyses (the one proposed above and previously published ones). Combining these two approaches will either support or help revising fundamental concepts in invasion biology.

入侵生物学研究已经被引入到其原生范围以外的地区的物种。它的许多基本概念缺乏坚实的经验基础，例如抵抗假说（认为更丰富和更少干扰的生物群提供了对入侵者的更大抵抗力）或敌人释放假说（解释入侵者的成功是因为他们从留在本地的敌人那里释放出来）。我建议通过结合两种方法来测试这些和其他概念。首先，我将创建一个岛屿和大陆的全球数据集，其中包含有关引入每个岛屿和大陆的动物和植物数量的信息，在那里建立的数量以及传播的数量，分别为不同的分类群。该数据集还将提供关于岛屿和大陆特征的信息（例如面积、生物多样性、人口密度）。这种自上而下的方法将为抵抗假说提供强有力的检验。第二，存在许多个体入侵事件的案例研究，但这种知识来源尚未用于调查入侵生物学的基本模式。我建议集体分析案例研究，并将这种自下而上的方法的结果与自上而下的分析（上面提出的和以前发表的）进行比较。结合这两种方法将支持或帮助修改入侵生物学的基本概念。