Soil moisture response to land use and topography across a semi-arid watershed: Implications for vegetation restoration on the Chinese Loess Plateau

Xin-shi, LU; Bi, Rutian; Song, Xiaoyu; Hu, Wei; Lyu, Chunjuan; Xi, Xu; Li, Huaiyou

doi:10.1007/s11629-021-6830-3

Cited by 11 publications

(10 citation statements)

References 48 publications

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“…Because PR grasses are drought tolerant, have small leaf areas, and are drought resistant (Lucas et al, 2013), perennial grasses such as Salicaceae and Lithospermum and PRs, as well as ABs, increased under grazing (Figure 3). Consistent with other studies, our study demonstrated that the 5-year grazing prohibition effectively increased the species diversity and coverage (Figures 2 and 7) by protecting grassland vegetation and soil from destruction (García-Favre et al, 2023;Xia et al, 2022), which is conducive to efficient grassland management and utilization. Meanwhile, grazing inhibition increased perennial grasses such as L. chinensis, Stipa krylovii, and C. squarrosa (Figure 3).…”

Section: Impact Of Grazing Disturbance On Grassland Vegetation Commun...supporting

confidence: 91%

Impact of precipitation and grazing on recovery of plant vegetation in temperate grasslands

Lin,

Zhao,

Zhang

et al. 2023

Land Degrad Dev

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Grasslands support a rich diversity that plays a pivotal role in ecological balance, carbon sequestration, and climate regulation. Grassland ecosystems are facing a loss of biodiversity and a decline in soil function due to precipitation variations caused by climate change. However, variations in grassland species diversity are not clearly known, especially under the combined effects of precipitation and grazing. Based on a 5‐year split‐plot experiment with two grazing regimes (i.e., moderate grazing and grazing prohibition) along with three precipitation controls (ambient precipitation and ±50% precipitation) in Inner Mongolian grasslands, we researched the response of precipitation variability and grazing prohibition to vegetation diversity indices and investigated the response of vegetation community composition and biomass to these factors. Five years results showed that increasing precipitation resulted in a significant increase in the coverage of perennial forbs, annual and biennial plants, and Gramineae. Grazing prohibition and increased precipitation significantly increased biomass and species richness compared to all other treatment combinations. Interestingly, grazing exclusion significantly reduced the percentage of Amaryllidaceae, especially in the presence of altered precipitation. The vegetation community composition of a typical grassland was correlated with soil volumetric water content (VWC), bulk density (SBD) and pH, soil organic carbon (SOC), and total nitrogen (TN). VWC, SBD, and TN were found to be the most significant factors affecting vegetation diversity under grazing. Partial canonical ordination revealed that soil moisture, soil bulk density, and SOC had the most significant correlation with vegetation diversity under both grazing prohibition and increased precipitation treatment conditions. These results suggested that alterations in precipitation can change the species composition and ecosystem function of plant communities, leading to a close relationship between species diversity and soil properties. Our results underline the importance of species diversity for soil characteristics and environmental factors in a typical Eurasian steppe ecosystem.

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Section: Impact Of Grazing Disturbance On Grassland Vegetation Commun...supporting

confidence: 91%

Impact of precipitation and grazing on recovery of plant vegetation in temperate grasslands

Lin,

Zhao,

Zhang

et al. 2023

Land Degrad Dev

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“…At present, the quantitative relationship between gully distribution and environmental factors has been widely studied. For example, the spatial distribution of gullies on a large regional scale, the correlations between gullies and geological conditions [ 35 ], the impact of land use on the development of gullies [ 36 , 37 ], the development and distribution of roadside gullies, the development of gullies under different watershed conditions [ 38 ], and the impact of gullies on eco-environmental quality [ 39 ]. These works were of great significance for the evaluation of gully erosion control [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Topographic Factors on the Characteristics of Gully Systems in Mountainous Areas of Ningnan Dry-Hot Valley, SW China

Cen

Zhang

Luo

et al. 2022

IJERPH

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A gully system is an important indicator that reflects the development of regional topography and landforms, and topography is one of the most important factors affecting the development of gullies. However, at present, research on the impact of topography on the development of gully systems in the mountainous area of Ningnan dry-hot valley still needs to be strengthened. In order to study the characteristics of gullies and the influence of topography on the development of gully systems, based on both the visual interpretation of remote sensing images and field investigations, five topographic factors (elevation, slope gradient, aspect, relief, and dissection) were employed and three gully erosion indexes (gully length, density, and frequency) were calculated. The geographical information system was used in this study to carry out the spatial analysis, Ward’s hierarchical clustering and correlation analysis. Results showed that the development of gully systems is greatly affected by the degree of relief and dissection, and there is a significant positive correlation (p < 0.01; p < 0.05), while elevation, slope gradient and aspect have little influence on it. Analysis of the gully systems showed that the gully erosion is the most intense in the area with an elevation of 2800–3200 m and slope gradients ≥ 38°. Furthermore, the degree of erosion on shady slopes was greater than that on sunny slopes. These results will help us to understand the spatial distribution and formation of gully systems in mountainous areas.

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“…While these factors have been shown to effectively reflect SM in areas with dense vegetation cover, their ability to do so may be limited in cold and arid regions with bare soilvegetation alternation due to the presence of large amounts of bare soil. Recent research suggests that land cover is also a crucial contributor to SM in arid and semi-arid regions (Deng et al, 2020;L. Xia et al, 2021).…”

Section: Core Ideasmentioning

confidence: 99%

“…While these factors have been shown to effectively reflect SM in areas with dense vegetation cover, their ability to do so may be limited in cold and arid regions with bare soil‐vegetation alternation due to the presence of large amounts of bare soil. Recent research suggests that land cover is also a crucial contributor to SM in arid and semi‐arid regions (Deng et al., 2020; L. Xia et al., 2021). Thus, the identification of downscaling factors that accurately reflect land cover based on the surface characteristics of bare soil‐vegetation alternation is a crucial step toward effective downscaling in cold and arid regions.…”

Section: Introductionmentioning

confidence: 99%

Downscaling SMAP soil moisture product in cold and arid region: Incorporating NDSI and BSI into the random forest algorithm

Gao,

Zhu,

Guo

et al. 2024

Vadose Zone Journal

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Soil moisture (SM) is a critical element of the hydrological cycle, land surface processes, and surface energy balance. However, the low spatial resolution of commonly used SM products limits the application of SM in agriculture and eco‐hydrology in cold and arid regions. In this study, the normalized difference soil index (NDSI) and bare soil index (BSI) were added to traditional downscaling factors including land surface temperature, normalized difference vegetation index, digital elevation mode, apparent thermal inertia, Albedo, and temperature vegetation dryness index, as they are more strongly correlated with surface SM in the bare soil‐vegetation alternation zone of such region. Using the random forest algorithm, a downscaling model of SM was constructed for such region. The accuracy of the downscaled SM estimates was validated by comparing them with the original SM data collected from May to September 2021, which is the non‐freezing period of the soil. The findings indicate that the newly added NDSI and BSI have good correlation with SM. Incorporating NDSI and BSI to construct the downscaled model enhances the accuracy by over 19% compared to excluding them, while also providing a more comprehensive representation of SM information. NDSI and BSI can be well applied to the downscaled research of SM in the bare soil‐vegetation alternation zone, which is of great value for the study of eco‐hydrology and agricultural drought monitoring in cold and arid regions.

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Soil moisture response to land use and topography across a semi-arid watershed: Implications for vegetation restoration on the Chinese Loess Plateau

Cited by 11 publications

References 48 publications

Impact of precipitation and grazing on recovery of plant vegetation in temperate grasslands

Impact of precipitation and grazing on recovery of plant vegetation in temperate grasslands

Influence of Topographic Factors on the Characteristics of Gully Systems in Mountainous Areas of Ningnan Dry-Hot Valley, SW China

Downscaling SMAP soil moisture product in cold and arid region: Incorporating NDSI and BSI into the random forest algorithm

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