Ecology of insects in canola agroecosystems

双低油菜农业生态系统昆虫生态学

• 批准号: 261479-2006
• 负责人: Dosdall, Lloyd
• 金额: $ 1.31万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=395038
• 关键词: Ecology; insects; canola; agroecosystems

My research program focuses on understanding ecological patterns and processes of insects inhabiting canola agroecosystems.  In Canada, these systems comprise approximately four to five million hectares annually, and are associated with a vast array of arthropods at several trophic levels.  My research will encompass three main areas.  First, I am working to understand the mechanisms that drive distribution patterns of canola insects in time and space.  By investigating dispersal and migration patterns of herbivores and their associated parasitoids, and by using geographical information systems technology to draw relationships between insect densities and factors responsible for them, it will be possible to predict areas within crops and within geographical regions associated with high herbivore densities.  Control activities can then be timed to have optimal impact on the pest and minimal effect on its natural enemies.  Second, I will investigate the role of abiotic stresses like drought and low soil fertility on canola, its herbivores, and herbivore natural enemies.  Understanding this relationship can lead to predictive models of the relationship between resource availability and insect population dynamics.  My third line of research will investigate causes and consequences of invasion of canola by alien species.  In particular, I will study how landscape variables affect the rate of dispersal of the cabbage seedpod weevil, and how invasion of the weevil indirectly affects the biodiversity of native weevil species. I currently have students working in one of these three research areas, and am anxious to train additional students if funding is awarded.  There is much work left to do in this field of research, and I consider training the next generation of insect agroecologists to be equal in importance to the research itself.

我的研究重点是了解油菜籽农业生态系统中昆虫的生态模式和过程。在加拿大，这些系统每年约有400万至500万公顷，与几个营养级别的大量节肢动物有关。我的研究将包括三个主要领域。首先，我致力于了解油菜籽昆虫在时间和空间上分布格局的机制。首先，通过调查食草动物及其相关寄生蜂的扩散和迁徙模式，并通过使用地理信息系统技术来绘制昆虫密度和导致它们的因素之间的关系，我们将有可能预测农作物内和与食草动物密度高相关的地理区域内的区域。然后，控制活动可以对害虫产生最佳影响，并将对其天敌的影响降至最低。其次，我将调查干旱和低土壤肥力等非生物胁迫对油菜、其草食动物和食草动物天敌的作用。通过了解这种关系，可以建立资源可获得性和昆虫种群动态之间关系的预测模型。我的第三条研究线将调查外来物种入侵油菜籽的原因和后果。尤其是，我将研究景观变量如何影响甘蓝结荚象甲的扩散速度，以及象甲的入侵如何间接影响当地象甲物种的生物多样性。我目前有学生在这三个研究领域中的一个领域工作，如果获得资助，我急于培训更多的学生。他说，在这个研究领域还有很多工作要做，我认为培训下一代昆虫农业生态学家与研究本身同等重要。