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首页> 外文期刊>Nordic Journal of Botany >Temporal development of vegetation and geomorphology in a man-made beach-dune system by natural processes.
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Temporal development of vegetation and geomorphology in a man-made beach-dune system by natural processes.

机译：植被和时间发展地貌学人造beach-dune系统自然过程。

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Twenty-four yrs of primary succession in a man-made beach-dune system at the Baltic coast of Denmark, built of calcareous, marine sand and the dune planted with Ammophila arenaria, was studied by qualitative observations, quantitative records in permanent plots, levelling and soil analysis within a selected area of 0.75 ha. The aim of the study was to discuss whether human initiated and influenced beach and dune dynamics mimick natural beach and dune processes, and to discuss the relationship between succession and zonation. During the study period, which started in 1979, the man-made dune stabilized rather fast. In the stabilized dune, a sand-pararendzina with a thin A-horizon developed. The beach expanded by accretion of less calcareous, marine sand. On the beach new dunes, 3 m high, successively developed. The number of species in the study area increased from 16 to 55, accompanied by species and life form dynamics, characteristic for primary succession on sandy coasts. A gradual change in species composition of the permanent plots, which appeared by a DCA analysis, could by using TWINSPAN be structured into four groups or plant communities, which reflect succession as well as zonation. Two groups represent the vegetation of sandy beaches with annual dicotyledon species, and mobile dunes dominated by rhizomatous geophytes, especially A. arenaria. The two other groups represent stabilized, calcareous dune, dominated by hemicryptophytes, specially Festuca rubra, and less stabilized dune with F. rubra and the invasive alien Rosa rugosa. It was concluded, that the main trends in the geomorphological and vegetational development of the man-made beach-dune system is similar to the development in natural dunes. In the future, further accretion and seaward dune formation may be expected, but is it also expected, that larger parts of the area gradually will be covered by low scrubs of R. rugosa..
机译：24岁的原生演替在波罗的海海岸的人造beach-dune系统丹麦,建造的钙质,海洋沙滩和沙丘种植Ammophila arenaria,进行了研究通过定性观察,定量记录在永恒的情节、平整和土壤分析在一个选定的面积0.75公顷。研究讨论是否人类发起海滩和沙丘动态模仿自然的影响海滩和沙丘过程和讨论继承和分带之间的关系。在研究期间,于1979年开始,人造沙丘稳定而快速。稳定的沙丘,sand-pararendzina薄淋溶层。吸积的钙质减少,海洋沙滩。海滩上新的沙丘,3米高,先后发展。区域从16岁到55岁不等的增加伴随着物种和生命形式动态、特点对砂质海岸原生演替。永久的物种组成的变化DCA分析情节,出现,可以通过利用TWINSPAN结构分成四组植物群落,这反映了继承分带。植被与年度沙滩双子叶植物物种,和移动沙丘为主通过地下茎的地下芽植物,尤其是arenaria。其他两组代表稳定,钙质沙丘,以地面芽植物为主,特别是羊茅rubra和不稳定的沙丘f . rubra和侵入性外来罗莎玫瑰。这是结论,主要的趋势地貌和植被的发展人造beach-dune系统类似发展自然沙丘。进一步吸积和外海沙丘的形成可能但它也预计会,大部分地区逐渐将被覆盖实习医生风云低r .玫瑰. .

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