...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Eurasian Soil Science >Soils of wet valleys in the Larsemann Hills and Vestfold Hills oases (Princess Elizabeth Land, East Antarctica)
【24h】

Soils of wet valleys in the Larsemann Hills and Vestfold Hills oases (Princess Elizabeth Land, East Antarctica)

机译：Larsemann山和Vestfold山绿洲（伊丽莎白公主地，南极洲）的湿谷土壤

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The properties and spatial distribution of soils and soil-like bodies in valleys of the coastal Larsemann Hills and Vestfold Hills oases-poorly investigated in terms of the soil areas of East Antarctica-are discussed. In contrast to Dry Valleys-large continental oases of Western Antarctica-the studied territory is characterized by the presence of temporarily waterlogged sites in the valleys. It is argued that the deficit of water rather than the low temperature is the major limiting factor for the development of living organisms and the pedogenesis on loose substrates. The moisture gradients in the surface soil horizons explain the spatial distribution of the different soils and biotic complexes within the studied valleys. Despite the permanent water-logging of the deep suprapermafrost horizons of most of the soils in the valleys, no gley features have been identified in them. The soils of the wet valleys in the Larsemann Hills oasis do not contain carbonates. They have a slightly acid or neutral reaction. The organic carbon and nitrogen contents are mainly controlled by the amount of living and dead biomass rather than by the humic substances proper. The larger part of the biomass is concentrated inside the mineral soil matrix rather than on the soil surface. The stresses caused by surface drying, strong winds, and ultraviolet radiation prevent the development of organisms on the surface of the soil and necessitate the search for shelter within the soil fine earth material (endoedaphic niche) or under the gravelly pavement (hypolithic niche). In the absence of higher plants, humified products of their decomposition, and rainwater that can wash the soil profile and upon the low content of silt and clay particles in the soil material, "classical" soil horizons are not developed. The most distinct (and, often, the only diagnosed) products of pedogenesis in these soils are represented by organomineral films on the surface of mineral particles.
机译：讨论了以南极东部土壤面积为基础进行调查不足的沿海拉尔瑟曼山丘和维斯特福尔丘陵河谷的土壤和类土壤物体的性质和空间分布。与干旱谷（南极西部的大型绿洲）相反，所研究的地区的特点是山谷中存在临时淹水的地点。有人认为，缺水而不是低温是限制生物生长和在松散的基质上形成土壤的主要限制因素。表层土壤层中的水分梯度解释了所研究山谷中不同土壤和生物复合物的空间分布。尽管山谷中大多数土壤的深层超霜冻层长期积水，但在这些土壤中未发现任何褶皱特征。拉瑟曼山绿洲湿谷的土壤不含碳酸盐。他们有轻微的酸或中性反应。有机碳和氮含量主要受活和死生物量的控制，而不是受腐殖质的控制。生物质的大部分集中在矿物土壤基质内部而不是土壤表面。由表面干燥，强风和紫外线辐射引起的应力阻止了土壤表面有机体的生长，因此必须在土壤细土材料（内生生态位）或砾石路面下（低聚生态位）寻找庇护所。在没有高等植物，分解的腐殖化产物以及可以冲洗土壤剖面的雨水的情况下，并且由于土壤材料中淤泥和粘土颗粒的含量低，因此没有开发出“经典的”土壤视野。这些土壤中成岩作用最独特的（通常是唯一被诊断的）产物是矿物颗粒表面的有机矿物膜代表的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号