固定沙丘和丘间低地是物质流和物种流的汇，同时又是重要的物种扩散的源。
The fixed sandy dune and lowland among sandy dunes act as converge of material and species flow, and they are also the source of species diffusing.
沙地植被在沙丘-丘间低地景观尺度上的分布格局决定于地形及因地形而异的土壤水分梯度。
The vegetation distributing pattern at the scale of dune-lowland lies on the terrain and the soil water gradient.
丘间低地土壤水分变化特征表现为：水分变化频繁活动层，水分潜在供应层，水分相对稳定层。
The changing features of the soil water in the lowland around by sand dune are: the frequent changing layer, the potential supplying layer and the relatively stable layer.
沿海为平原、低地，间有低丘。
沿海为平原、低地，间有低丘。
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