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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >The origin and persistence of alpine vernal ponds in mineral soils
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The origin and persistence of alpine vernal ponds in mineral soils

机译：高山春季池塘在矿物质中的起源和持续性

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摘要

Little is known of the processes that create and maintain vernal ponds in mineral soils in alpine environments. On the Central Plateau, Tasmania, we tested the hypotheses that vernal pond complexes on mineral soils formed in response to the underlying topography of a glacio-fluvial plain; relate to present day topography; resulted from past damming by organic accumulation; are moulded by wind. The underlying topography did not relate to the surface ponds, nor were they on steeper slopes than adjacent areas without ponds. The morphology of the ponds and the morphological and edaphic characteristics of the pond complexes and adjacent areas are consistent with an origin by organic material damming. The strongest winds orientate most ponds, rather than the aspect of the slope. Sediments were preferentially caught on sticky traps to the northeast of the ponds, away from fierce prevailing southwesterly winds. Temperature measurements and fortnightly observation showed non-concordant patterns of variation in water levels in the ponds. We deduce that the complexes of vernal ponds may have formed in previous moister conditions more favourable to organic matter accumulation, possibly in the early Holocene, and are maintained by a faster rate of accumulation of mineral and organic particles in the tussock grassland adjacent to the ponds than in the ponds themselves. (c) 2019 John Wiley & Sons, Ltd.
机译：众所周知，在高山环境中创造和维持矿物土壤中的春季池塘的过程。在中央高原，塔斯马尼亚州，我们测试了春季池塘复合物在响应于甘草 - 氟普利亚平原的潜在地形而形成的矿物土壤的假设;涉及现在的地形;由于过去的有机积累而受到过滤;被风塑造。潜在的地形与地表池塘没有涉及陡峭的坡度，而不是没有池塘的相邻区域。池塘和池塘复合物和相邻区域的形态学和辅助特性的形态与有机材料滤压的起源一致。最强大的风定向大多数池塘，而不是斜坡的方面。沉积物优先捕获到池塘的东北部的粘滞陷阱，远离剧烈的盛行的西南风。温度测量和每两周观察显示池塘中水分水平的非协调模式。我们推导出春季池塘的复合物可能已经在以前的水病条件中形成，更有利于有机物质积累，可能在全新世中，并通过池塘园区的矿物和有机颗粒积累的速度升高而维持比在池塘里自己。 （c）2019 John Wiley＆Sons，Ltd。

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