Decline in soil moisture due to vegetation restoration on the Loess Plateau of China

Su, Bingqian; Shangguan, Zhouping

doi:10.1002/ldr.3223

Cited by 98 publications

(52 citation statements)

References 40 publications

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“…Compared with deciduous trees, the evergreen trees can allocate more photosynthetic products for fine root production (Vogt et al , 1986) which was supported by Gao and Huang (2020). In terms of soil water depletion, Su and Shangguan (2019) reported that there were no significant differences between deciduous and evergreen tree species in the Loess Plateau at a regional scale which was consistent with our results (Fig.6). Overall, the vegetation types or tree species exhibited great impacts on the trade-off between soil water maintenance and carbon sequestration, and grassland has the potential to achieve this win-win situation.…”

Section: Land-use Conversion Typessupporting

confidence: 90%

“…As is typical in meta-analysis, most of the published papers reported mean values for treatment and control plots but not standard deviations or standard errors. To maximize the number of observations included in the present analysis, we used unweighted meta-analysis, as described in earlier studies (Deng et al , 2016;Su and Shangguan, 2019).…”

Section: Meta-analysismentioning

confidence: 99%

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Trade-off between soil water maintenance and carbon sequestration during the implementation of ecological restoration programs in semi-arid Loess Plateau

Liu

et al. 2020

Preprint

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Converting degraded ecosystems into perennial vegetation in water-limited regions creates potentially conflicting demands for soil water maintenance and carbon sequestration. Current understanding of these competing demands remains still limited. In this study, to quantify the trade-off between them resulting from land-use conversion (converting cropland into forest, shrub and grassland usually) in the Loess Plateau, 2775 observations for soil organic carbon (SOC) stocks (to a depth of 100 cm) and 2654 observations for soil water storage (SWS) (to a depth of 500 cm) from peer-reviewed papers and measured data were synthesized. Results showed that (1) Land-use conversion influenced the trade-off greatly, and in general, converting cropland into natural grassland and evergreen trees performed relatively better in carbon sequestration and soil water maintenance; (2) In rainfall zone less than 550 mm, natural grassland exhibited higher capability in increasing SOC stock but maintaining a lower SWS depletion while forest was a better choice in rainfall greater than 550 mm; (3) With restoration age increasing, SOC stock and SWS depletion both increased significantly, and nevertheless natural grassland appeared to be sustainable and stable to achieve a win-win result. Moreover, with ages increasing, an accumulation of 0.7 Mg ha-1 SOC stock in the upper 100 cm was associated with an approximately 5.14 mm SWS decrease in the 0-500 cm soil layers. Overall, this study provides practical insights for land and water managers on how to achieve the win-win results between soil-and water-related ecosystem services during ecological restoration in water-limited regions.

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Section: Land-use Conversion Typessupporting

confidence: 90%

Section: Meta-analysismentioning

confidence: 99%

Trade-off between soil water maintenance and carbon sequestration during the implementation of ecological restoration programs in semi-arid Loess Plateau

Liu

et al. 2020

Preprint

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“…Recently, many studies have pointed that conversions of land use types and vegetation recovery led to the decline of local soil water storage. Particularly in regions with a remarkable vegetation increase or large area of artificially planted exotic species, overconsumption of soil water resulted in a widespread dry soil layer [57,72]. Observations showed that the soil water contents under Robinia pseudoacacia, one of the main afforestation species in the Loess Plateau, decreased rapidly [73] and the drying layer extended from shallow layers (0-100 cm) to deeper layers (100-500 cm) with increasing forest age [74].…”

Section: Implications Of Vegetation Change Sustainability In Ecologicmentioning

confidence: 99%

Changes in Vegetation Greenness in the Upper and Middle Reaches of the Yellow River Basin over 2000–2015

2019

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The Grain to Green Project (GTGP), a large ecological restoration project aiming to control soil erosion and improve the ecological environment, has been implemented since 1999 and has led to great land use changes with decreased farmland and increased forest and grass, and significant vegetation variations. Understanding vegetation variations for different land use types is important for accessing the present vegetation development and providing scientific guidance for future ecological restoration design and regional sustainable development. With two land use maps and MODIS LAI data, trend analysis, fluctuation analysis, and R/S methods were applied to analyze the vegetation dynamic changes and sustainability for converted land use types from cropland and unconverted types over 2000–2015 in the upper and middle reaches of the Yellow River. The results obtained were as follows: (1) Vegetation greening was remarkable in the entire study region (0.036 yr−1). The increasing rate was higher in wetter conditions with AI < 3 (0.036–0.053 yr−1) than arid regions with AI > 3 (0.012–0.024 yr−1). (2) Vegetation improved faster for converted forestland, shrubland, and grassland than unconverted types under similar drying conditions. Converted shrubland and grassland had a larger relative change than converted forestland. (3) Converted land use types generally exhibited stronger fluctuation than unconverted types with small differences among types. (4) Vegetation exhibited a sustainable increasing trend in the future, which accounted for more than 73.1% of the region, mainly distributed in the middle reach of the Yellow River. Vegetation restoration exerted important influences on vegetation greening and the effect was stronger for converted types than unconverted types.

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“…And the relationships between rainfall and surface runoff in these places are relatively stronger (Figure 5). However, although the forest cover area significantly increased for the Beiluo River basin in P2, the runoff coefficient still remained small (<0.1), which may also correlate with increased consumption of water due to the growth of secondary vegetation (Su & Shangguan, 2019).…”

Section: Discussionmentioning

confidence: 99%

The Changing Relationship Between Rainfall and Surface Runoff on the Loess Plateau, China

et al. 2020

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Lack of hydrological data of high spatiotemporal resolution has been a major challenge for understanding the rainfall-runoff relationship on the Loess Plateau of China. In this study, we examined this relationship across 82 watersheds on the plateau for two time periods: P1 (1971-1987) and P2 (2008-2016). We found linear relationships between the annual rainfall series and annual surface runoff series in P1 that were stronger in the southeast and that declined toward the northwest, but this spatial pattern was slightly disrupted during P2. The mean annual runoff coefficient ranged from 0.056 to 0.126 for the 25th and 75th percentiles, respectively, during the P1 period, but the corresponding values were smaller in P2 (0.035 and 0.088, respectively). In total, the runoff coefficient decreased for 87% of the watersheds, with an average reduction of 0.033. For most watersheds of the plateau, we found a stable threshold value for the monthly runoff coefficient when monthly rainfall reached a certain value (i.e., a critical point). Between P1 and P2, the threshold value of the runoff coefficient decreased for 57 watersheds as a result of soil conservation measures. The rainfall critical point represents the minimum monthly rainfall to maintain the stable relationship between monthly infiltration and monthly rainfall in the process of runoff production. This value became greater on the middle regions of the plateau during P2 (increasing by 28% on average). Check dams, vegetation, and land use all have profoundly influenced the relationship between rainfall and surface runoff in this region.

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Decline in soil moisture due to vegetation restoration on the Loess Plateau of China

Cited by 98 publications

References 40 publications

Trade-off between soil water maintenance and carbon sequestration during the implementation of ecological restoration programs in semi-arid Loess Plateau

Trade-off between soil water maintenance and carbon sequestration during the implementation of ecological restoration programs in semi-arid Loess Plateau

Changes in Vegetation Greenness in the Upper and Middle Reaches of the Yellow River Basin over 2000–2015

The Changing Relationship Between Rainfall and Surface Runoff on the Loess Plateau, China

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