乌兰布和沙漠白刺干旱区风蚀土壤颗粒的空间异质性

IF 1.3 4区环境科学与生态学 Q3 ECOLOGY

Ecoscience Pub Date : 2019-07-29 DOI:10.1080/11956860.2019.1646064

Dang Xiaohong, Pan Xia, Gao Yong, Liu Yang, Wang Zhenyi, Meng Zhongju

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引用次数: 10

摘要

摘要白刺是乌兰布和沙漠西南缘吉兰台盐湖上分布广泛的灌木。由于其提高土壤肥力的作用，nebkhas(灌木林沙丘)被认为是干旱土地生态系统的重要组成部分。然而，尽管它们频繁发生，但关于它们的降尘效果和影响范围的资料却很少。研究了四种风向下小尺度(10 m内)唐古托姆周边的粒径分布，并分析了颗粒的空间异质性。不可蚀颗粒的数量(>0.85 mm)随距离灌木的远近而增加。可蚀性颗粒(<0.45 mm)和半可蚀性颗粒(0.45 ~ 0.85 mm)呈相反趋势，表明灌木具有保护作用。灌木周围的优势颗粒由于长期加速的风蚀和随后的细颗粒的去除而不被侵蚀。

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Spatial Heterogeneity of Wind-Eroded Soil Particles Around Nitraria tangutorum Nebkhas in the Ulan Buh Desert

ABSTRACT Nitraria tangutorum is a widely distributed shrub in the Jilantai Salt Lake at the southwest edge of Ulan Buh Desert. Due to their role in increasing soil fertility, nebkhas (coppice dunes) are regarded as important components of arid land ecosystems. Yet, despite their frequent occurrence, little information exists regarding their dust fall effect and influence range. We investigated the grain size distribution around N. tangutorum at a small scale (within 10 m) according to four wind directions and analyzed the spatial heterogeneity of particles. The amount of non-erodible particles (>0.85 mm) increased with distance from the shrub. The amount of erodible (<0.45 mm) and semi-erodible particles (0.45–0.85 mm) showed an opposite trend, indicating that the shrubs have a protective effect. The dominant particles around the shrubs were non-erodible due to long term accelerated wind erosion and subsequent removal of fine particles.

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来源期刊

Ecoscience 环境科学-生态学

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： Écoscience, is a multidisciplinary journal that covers all aspects of ecology. The journal welcomes submissions in English or French and publishes original work focusing on patterns and processes at various temporal and spatial scales across different levels of biological organization. Articles include original research, brief communications and reviews.