Integrating Soil Property Surveys and Soil Landscape Models in the Development of a Habitat Suitability Model for Dakota Skipper, a Threatened Butterfly Species

将土壤特性调查和土壤景观模型结合起来，为受威胁的蝴蝶物种达科塔船长制定栖息地适宜性模型

• 批准号: 481424-2015
• 负责人: BedardHaughn, Angela
• 金额: $ 1.75万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=581773
• 关键词: Integrating; Soil; Property; Surveys; Landscape

The Dakota Skipper (Hesperia dacotae) is a threatened butterfly species under the federal Species at Risk Act. Its distribution is limited to habitats of mixed-grass prairie, which has decreased dramatically in extent. As mixed-grass prairie habitat continues to decline across southern Saskatchewan and Manitoba, the abundance of Dakota Skipper is also presumed to be declining, but at this point, there is a knowledge gap pertaining to habitat suitability and availability. Based on previous surveys in Manitoba and the northern US, Dakota Skipper habitat suitability is controlled by more than just the presence/absence of available native prairie vegetation: there seems to be an interaction with other environmental variables, including some evidence of correlation between select soil properties and Dakota Skipper habitat. Unfortunately, these previous studies were not designed to properly characterize the relationship among soils, vegetation, and Dakota Skipper populations. Therefore, the specific objective for this proposal is to develop a predictive soil-landscape model for Dakota Skipper habitat by: a) evaluating the correlation strength between Dakota Skipper presence and select soil properties within remnant mixed-grass prairie patches and b) predicting the distribution of those soil properties. This information can then be integrated with surveys of other environmental variables to develop a habitat suitability model for Dakota Skippers and a modeling framework to developing additional habitat suitability models based on similar model parameters for invertebrate species at risk.

根据联邦《濒危物种法》，达科他船长（Hesperia dacotae）是一种受威胁的蝴蝶物种。其分布仅限于混草草原的栖息地，其范围已急剧减少。随着萨斯喀彻温省南部和马尼托巴的混草草原栖息地继续下降，达科他州船长的丰度也被认为在下降，但在这一点上，有一个关于栖息地的适宜性和可用性的知识差距。根据之前在马尼托巴和美国北方进行的调查，达科他州船长栖息地的适宜性不仅仅取决于是否存在可用的原生草原植被：似乎与其他环境变量存在相互作用，包括一些选择土壤属性和达科他州船长栖息地之间相关性的证据。不幸的是，这些以前的研究并没有被设计为适当地表征土壤，植被和达科他州船长种群之间的关系。因此，本提案的具体目标是通过以下方式为达科他州船长栖息地开发一个预测土壤景观模型：a）评估达科他州船长的存在与剩余混合草草原斑块内的选择土壤特性之间的相关强度，以及B）预测这些土壤特性的分布。然后，这些信息可以与其他环境变量的调查相结合，以开发一个栖息地适宜性模型达科他州船长和建模框架，以开发其他栖息地适宜性模型的基础上，类似的模型参数的无脊椎动物物种的风险。