Spatial Distribution of Shrubs Impacts Relationships among Saltation, Roughness, and Vegetation Structure in an East Asian Rangeland

Vegetation influences the occurrence of saltation through various mechanisms. Most previous studies have focused on the effects of vegetation on saltation occurrence under spatially homogeneous vegetation, whereas few field studies have examined how spatially heterogeneous cover affects saltation. T...

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Autores principales:	Akito Kono, Toshiya Okuro
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	wind erosion intershrub distance aerodynamic roughness length threshold friction velocity rangeland management Agriculture S
Acceso en línea:	https://doaj.org/article/c57a0f60955a4f94954bb7d9211d062f
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spelling	oai:doaj.org-article:c57a0f60955a4f94954bb7d9211d062f2021-11-25T18:09:46ZSpatial Distribution of Shrubs Impacts Relationships among Saltation, Roughness, and Vegetation Structure in an East Asian Rangeland10.3390/land101112242073-445Xhttps://doaj.org/article/c57a0f60955a4f94954bb7d9211d062f2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-445X/10/11/1224https://doaj.org/toc/2073-445XVegetation influences the occurrence of saltation through various mechanisms. Most previous studies have focused on the effects of vegetation on saltation occurrence under spatially homogeneous vegetation, whereas few field studies have examined how spatially heterogeneous cover affects saltation. To examine how spatial heterogeneity of vegetation influences saltation, we surveyed the vegetation and spatial distribution of shrubs and conducted roughness measurements at 11 sites at Tsogt-Ovoo, Gobi steppe of Mongolia, which are dominated by the shrubs <i>Salsola passerina</i> and <i>Anabasis brevifolia</i>. Saltation and meteorological observations were used to calculate the saltation flux, threshold friction velocity, and roughness length. The spatial distribution of shrubs was estimated from the intershrub distance obtained by calculating a semivariogram. Threshold friction velocity was well explained by roughness length. The relationships among roughness, saltation flux, and vegetation cover depended on the spatial distribution of shrubs. When the vegetation was distributed heterogeneously, roughness length increased as the vegetation cover decreased, and the saltation flux increased because the wake interference flow became dominant. When the vegetation was spatially homogeneous, however, the saltation flux was suppressed even when the vegetation cover was small. These field experiments show the importance of considering the spatial distribution of vegetation in evaluating saltation occurrence.Akito KonoToshiya OkuroMDPI AGarticlewind erosionintershrub distanceaerodynamic roughness lengththreshold friction velocityrangeland managementAgricultureSENLand, Vol 10, Iss 1224, p 1224 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	wind erosion intershrub distance aerodynamic roughness length threshold friction velocity rangeland management Agriculture S
spellingShingle	wind erosion intershrub distance aerodynamic roughness length threshold friction velocity rangeland management Agriculture S Akito Kono Toshiya Okuro Spatial Distribution of Shrubs Impacts Relationships among Saltation, Roughness, and Vegetation Structure in an East Asian Rangeland
description	Vegetation influences the occurrence of saltation through various mechanisms. Most previous studies have focused on the effects of vegetation on saltation occurrence under spatially homogeneous vegetation, whereas few field studies have examined how spatially heterogeneous cover affects saltation. To examine how spatial heterogeneity of vegetation influences saltation, we surveyed the vegetation and spatial distribution of shrubs and conducted roughness measurements at 11 sites at Tsogt-Ovoo, Gobi steppe of Mongolia, which are dominated by the shrubs <i>Salsola passerina</i> and <i>Anabasis brevifolia</i>. Saltation and meteorological observations were used to calculate the saltation flux, threshold friction velocity, and roughness length. The spatial distribution of shrubs was estimated from the intershrub distance obtained by calculating a semivariogram. Threshold friction velocity was well explained by roughness length. The relationships among roughness, saltation flux, and vegetation cover depended on the spatial distribution of shrubs. When the vegetation was distributed heterogeneously, roughness length increased as the vegetation cover decreased, and the saltation flux increased because the wake interference flow became dominant. When the vegetation was spatially homogeneous, however, the saltation flux was suppressed even when the vegetation cover was small. These field experiments show the importance of considering the spatial distribution of vegetation in evaluating saltation occurrence.
format	article
author	Akito Kono Toshiya Okuro
author_facet	Akito Kono Toshiya Okuro
author_sort	Akito Kono
title	Spatial Distribution of Shrubs Impacts Relationships among Saltation, Roughness, and Vegetation Structure in an East Asian Rangeland
title_short	Spatial Distribution of Shrubs Impacts Relationships among Saltation, Roughness, and Vegetation Structure in an East Asian Rangeland
title_full	Spatial Distribution of Shrubs Impacts Relationships among Saltation, Roughness, and Vegetation Structure in an East Asian Rangeland
title_fullStr	Spatial Distribution of Shrubs Impacts Relationships among Saltation, Roughness, and Vegetation Structure in an East Asian Rangeland
title_full_unstemmed	Spatial Distribution of Shrubs Impacts Relationships among Saltation, Roughness, and Vegetation Structure in an East Asian Rangeland
title_sort	spatial distribution of shrubs impacts relationships among saltation, roughness, and vegetation structure in an east asian rangeland
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c57a0f60955a4f94954bb7d9211d062f
work_keys_str_mv	AT akitokono spatialdistributionofshrubsimpactsrelationshipsamongsaltationroughnessandvegetationstructureinaneastasianrangeland AT toshiyaokuro spatialdistributionofshrubsimpactsrelationshipsamongsaltationroughnessandvegetationstructureinaneastasianrangeland
_version_	1718411583591284736

Spatial Distribution of Shrubs Impacts Relationships among Saltation, Roughness, and Vegetation Structure in an East Asian Rangeland

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