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首页> 外文期刊>Phytocoenologia >Phytosociological studies in the Alashan Gobi - A contribution to the flora and vegetation of Inner Mongolia (NW China)
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Phytosociological studies in the Alashan Gobi - A contribution to the flora and vegetation of Inner Mongolia (NW China)

机译：阿拉善戈壁的植物社会学研究-对内蒙古植物区系和植被的贡献（中国西北地区）

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The study contributes to the knowledge of the semi-desert and desert communities of the southern Alashan Gobi (Ejina Qi area) and the montane slopes and foothills of the northem Qilian Shan, Beishan, and Ya Gan Mts. of northwestern China. It follows the traditional BRAUN-BLANQUEI approach. Stone and gravel deserts are the most common and most impressive feature of the landscape, typical of the more or less flat and extended alluvral plains, terraces and depressions In addition, dunes and aeolian sands occur, dominated by psammophytic phytocoenoses. Outstanding and very prominent is the Ruoshui rivet system, its inland delta and endorheic basins, which drains the whole area. As most parts of the area receive less than 60 mm rainfall per year, xerophytic semi-shrubs and dwarf-shrubs give a peculiar appearance to this desert. The zonal vegetation drastically changes from shrub semi-deserts and montane dwarf-shrub communities (Sympegma montane steppe) in the surrounding mountains, to a very open desertsteppe, dominated by dwarf-shrubs, such as Artemisia tschetnieviana, Ephedra przewalskii, Nitraria, sphaerocarpa, Reaumttria soongotica, and Zygophyllum xanthoxylon. Trees are a tarity and exclusively linked with the groundwater flow of the Ruoshui, where phreato-phytes, such as Populns euphratica and Tamarix ramosissima, dominate the natural riparian woodland. Frequently intermixed are aeolian sands, dunes and salty depressions (solonchak formation) with various psammophytes [e.g. , Calligonum mongolicum, Haloxylon ammodendron ('black saxaul')] and halophytes (e.g., Aeluropm littoralis vat., sinen-sts, Kahdium foliatum, Salicomia perennans). They form the azonal vegetation of the whole area Grasslands (Achnathetum splendent) and marshes (Phragmites reed) occur around flood plain depressions, stream sides and the endorheic basins, providing an important grazing resource for the local people and their life-stock. In total, five classes, six orders, six alliances, seven associations, three subassociatrons and eight rankless communities are treated for the first time from this part of China Six of the units are described as new (viz., Asterothamno centrali-asiatici - Gymno-carpetum przewalskii, Nitrario sphaerocarpae-Artemisietum tschemievianae, with the subassociations typicum, lycietosum ruthenicae, and calligonetosum mongolicae, Salicornio perennantis-Aeluropeturn sinensis, Ha-leipesto cymbalariae-Crypsietum aculeatae). They provide the basis for the comparison of the vegetation of the study area with the units described from the neighbourrng Mongolia, which remain the single syntaxonomic reference for this part of Central Asia.
机译：该研究有助于了解阿拉善戈壁南部（额济纳旗地区）的半沙漠和沙漠群落以及祁连山，北山和亚干山北部的山地斜坡和山麓。西北地区它遵循传统的BRAUN-BLANQUEI方法。石头和砾石沙漠是该景观中最常见，最令人印象深刻的特征，典型的是或多或少平坦且延伸的冲积平原，阶地和洼地。此外，还出现了沙丘和风沙，主要由沙生植物藻类组成。若水铆钉系统，内陆三角洲和背胶盆地都非常杰出，非常引人注目，流失了整个地区。由于该地区大部分地区每年的降雨量不足60毫米，因此旱生半灌木丛和矮灌木丛给这片沙漠带来了奇特的外观。地带植被从周围山区的灌木半荒漠和山地矮矮灌木群落（Sympegma山地草原）急剧变化，到一个以矮灌木为主的非常开放的荒漠草原，例如蒿蒿，麻黄，麻黄，尼特拉里亚，斯弗雷卡帕不久的Reaumttria，和Zygophyllum xanthoxylon。树木是稀有植物，仅与若水的地下水流有关，在这里，植物类植物，如胡杨木（Populns euphratica）和Ta柳（Tamarix ramosissima）占据着天然河岸林地。经常将风沙，沙丘和盐洼（索伦察克形成）与各种沙生植物混在一起[例如，蒙古沙拐枣，梭梭（'Saxalul'）和盐生植物（例如，Aeluropm littoralis vat。，sinen-sts，叶枯萎病菌，Salicomia perennans）。它们形成了整个草地（壮丽的Achnathetum）和沼泽（芦苇）周围的带状植被，在洪泛平原的洼地，溪流两侧和背胶盆地周围形成了沼泽，为当地人民及其牲畜提供了重要的放牧资源。总共第一次从中国这一地区开始对待五个班级，六个命令，六个同盟，七个协会，三个亚联合会和八个无等级社区。六个单位被描述为是新的（即，Asterothamno centrali-asiatici-Gymno -Carpetum przewalskii，Nitrario sphaerocarpae-Artemisietum tschemievianae，typicum亚属，lycietosum ruthenicae和mcalloliconetomongolicae，Salicornio perennantis-Aeluropeturn sinensis，Ha-leipesto cymbalariae-Cry。它们为将研究区域的植被与邻国蒙古描述的单位进行比较提供了基础，这些单位仍然是中亚这一部分的唯一语法参考。

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