Complex Effects of Landscape Modification on Plant Functional Connectivity

景观改造对植物功能连通性的复杂影响

• 批准号: 341932-2013
• 负责人: Wagner, Helene
• 金额: $ 1.97万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=527532
• 关键词: Complex; Effects; Landscape; Modification; Plant

Sustainable management of Canada's natural resources is jeopardized by human landscape alteration and climate change, which affect species in multiple and complex ways. In plants, small isolated populations in remnant habitat patches may suffer from increased risk of local extinction, reduced chance of recolonization, loss of genetic diversity and thus potential for adaptation to climate change, and reduced fitness due to inbreeding. These consequences of human landscape alteration depend largely on how well seeds and pollen move across the landscape. Many plants rely on different vectors (e.g., wind, birds, mammals, or insects) for pollination and seed dispersal, so that the exchange of individuals and their genes between habitat patches (functional connectivity) depends on the interaction of the dispersal vectors with the intervening landscape (matrix resistance), which may differ between pollen and seeds. To address these issues, my lab will capitalize on a 20-year landscape modification experiment aimed at restoring functional connectivity of calcareous grasslands by reconnecting abandoned patches with intact grasslands through rotational shepherding.

人类景观改变和气候变化危害了加拿大自然资源的可持续管理，这会以多种和复杂的方式影响物种。在植物中，残留栖息地斑块中的少量孤立人群可能会遭受局部灭绝​​的风险增加，重新殖民的机会减少，遗传多样性的丧失以及适应气候变化的潜力以及由于近亲繁殖而降低的适应性。人类景观改变的这些后果在很大程度上取决于种子和花粉在整个景观中的移动程度。许多植物依赖于不同的载体（例如，风，鸟类，哺乳动物或昆虫）进行授粉和种子分散，因此个体及其基因之间的栖息地斑块（功能连通性）之间的交换取决于分散矢量与间隔景观（Matrix抗性）的相互作用，这可能会在Pollen和种子之间有所不同。为了解决这些问题，我的实验室将利用为期20年的景观修改实验，旨在通过旋转牧羊人重新连接带有完整的草原的废弃斑块，以恢复钙质草原的功能连通性。