Limited effects of simulated acidic deposition on seedling survivorship and root morphology of endemic plant taxa of the Athabasca Sand Dunes in well-watered greenhouse trials
Limited effects of simulated acidic deposition on seedling survivorship and root morphology of endemic plant taxa of the Athabasca Sand Dunes in well-watered greenhouse trials
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在浇水良好的温室试验中，模拟酸沉积对阿萨巴斯卡沙丘特有植物类群的幼苗存活率和根形态的影响有限
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
E. Lamb
中科院分区：
文献类型：
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作者：
A. Guy;Jenalee M. Mischkolz;E. Lamb
萨斯喀彻温省北方的阿萨巴斯卡沙丘支持10种地方特有的维管植物分类群，这些植物被列入《濒危物种法》（SARA）。阿萨巴斯卡沙丘受到酸性沉积的潜在影响是一个重大的知识差距，全面重新评估这些类群的保护状况。我们使用了温室实验，以评估潜在的影响，酸沉降对根系形态的以下三个特有种：Armeria maritima（P.米尔）Willd。SSP. interior（Raup）Porsid、Deschampsia mackenzieana Raup和Stellaria arenicola Raup。我们发现三种pH处理对根直径，根长，表面积和分枝的影响有限。虽然酸性沉积可能不是一个短期威胁，但当前和未来的沉积仍然可能是一个重大的长期威胁。阿萨巴斯卡沙丘土壤被认为是高度敏感的，酸化和养分淋溶可能需要几十年才能显现出来。这应该被考虑……
The Athabasca Sand Dunes of northern Saskatchewan support 10 endemic vascular plant taxa listed under the Species at Risk Act (SARA). The Athabasca Sand Dunes are subject to acidic deposition; the potential impacts of which are a significant knowledge gap to a comprehensive reassessment of the conservation status of these taxa. We used a greenhouse experiment to assess the potential effects of acidic deposition on the root system morphology of the following three endemic species: Armeria maritima (P. Mill) Willd. ssp. interior (Raup) Porsild, Deschampsia mackenzieana Raup, and Stellaria arenicola Raup. We found limited effects of three pH treatments on root diameter, root length, surface area, and branching. Although acidic deposition is likely not a short-term threat, current and future deposition still may be a significant long-term threat. The Athabasca Sand Dune soils are considered highly sensitive, and acidification and nutrient leaching can take several decades to manifest. This should be considere...