Rainfall driven transport of carbon and nitrogen along karst slopes and associative interaction characteristic

Song, Xinshan; Gao, Yang; Green, Sophie M.; Wen, Xuefa; Dungait, Jennifer A. J.; Xiong, Bailian; Quine, Timothy A.; He, Nianpeng

doi:10.1016/j.jhydrol.2019.03.083

Cited by 18 publications

(8 citation statements)

References 46 publications

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“…Karst areas in southwest China cover nearly 5.4 × 10 5 km 2 , and constitute the largest contiguous karst area in the world (Hartmann et al, 2014; Z. W. Li, Xu, & Yu, 2016; Song et al, 2019). Carbonate‐derived laterite is the most common type of soils in this area, and it has special expansion‐shrinkage characteristics.…”

Section: Introductionmentioning

confidence: 99%

Effects of vegetation restoration on carbonate‐derived laterite erodibility in karst mountain areas

2022

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Vegetation restoration can exert a profound influence on surface soil characteristics, which likely plays a significant role in the evolution of soil erodibility. This study was conducted to quantify the effects of vegetation restoration on the soil erodibility of carbonate-derived laterite in karst areas. Experiments were conducted at two representative sites for different years of vegetation restoration. Six karst mountain land use types [grassland (Y1), shrubland (Y2) and woodland (Y3) in young forest (YF); forest trails (O1), shrubland (O2) and woodland (O3) in old forest (OF)]. A structural equation model and random forest regression analysis were applied to distinguish the key environmental factors dominating soil erodibility. The results showed that the soil erodibility K factor exponentially decreased with increasing restoration age and tended to remain stable after 20 years (y = 0.0466 + 0.0316e À0.2889x , R 2 = 0.98). The K factor in the OF decreased by an average of 2.1%-14.8% compared to those in the YF. A structural equation model indicated that vegetation restoration indirectly reduced soil erodibility by altering plant growth and coverage and its associated soil property changes. A random forest regression analysis of global datasets indicated that soil erodibility is mainly affected by topographical factors (i.e., latitude, elevation and slope), and their mean decrease accuracy values (IncMSE) exceeded 20%. Both forestland and shrubland were not considered as the most important factors for affecting global soil erodibility. Conversely, grassland, cropland and bare land were among the important factors. These results could guide the potential benefits of vegetation restoration strategies to meet soil conservation and ecosystem function goals in karst mountain ecosystems.

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Section: Introductionmentioning

confidence: 99%

Effects of vegetation restoration on carbonate‐derived laterite erodibility in karst mountain areas

2022

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“…CZS had revealed the negative consequences of poorly managed tillage on steeply sloping fields for the environment (Green et al., 2019; Quine et al., 2017; Zheng et al., 2018) and farmer livelihoods (M. Liu et al., 2019a; X. D. Song et al., 2019a; X. W. Song et al., 2019b) (Figure 3a). The Grain for Green programme promoted the abandonment of very degraded, sloping agricultural land and natural recolonization by diverse species (M. Liu et al., 2019a, 2019b; Y. Yang et al., 2022), or change to conservation management (X. D. Song et al., 2019a; X. W. Song et al., 2019b). Both land use changes led to reduced erosion rates and restored soil organic carbon (Z. Guo et al., 2021) and were associated with improvements in soil structure (M. Liu et al., 2019b) (Table 1a).…”

Section: The China‐uk Czo Network: Demonstrating a Shift From A 2nd T...mentioning

confidence: 99%

“…Improve nutrient use efficiency Nutrient cycling Soil N and P explained 13.5% and 12.4% of crop yield variances, respectively, at the Karst CZO (Liang et al, 2020); high risk of environmental pollution prevents increasing crop yield through fertilization (Liang et al, 2021) -Shift from "leaky" to "tight" N-cycling processes (D. Li et al, 2018) -Re-emergence of microbial N-cycling functions in soil after agricultural abandonment (D. Li et al, 2018Li et al, , 2021a 15 Farmers in all CZs identified fertilisers as their greatest cost and one of the top three farming challenges they face (Zheng et al,. 2018, this paper) 1,2 -Reduce N inputs to improve economic livelihoods and well-being -Judicious use of N with crop residue returns increases soil C (X. D. Song et al, 2019a;X. W. Song et al, 2019b) -Reduce fertilizer use to increase crop yields (Liang et al, 2020(Liang et al, , 2021 Reduce point-source pollution by reducing fertiliser use…”

Section: Zero-growth Action Plan For Chemical Fertilizers and Pesticidesmentioning

confidence: 99%

“…CZS had revealed the negative consequences of poorly managed tillage on steeply sloping fields for the environment (Green et al, 2019;Quine et al, 2017;Zheng et al, 2018) and farmer livelihoods (M. Liu et al, 2019a;X. D. Song et al, 2019a;X. W. Song et al, 2019b) (Figure 3a).…”

Section: How Local Knowledge Improved Interpretation Of Czs Data On S...mentioning

confidence: 99%

“…W. Song et al, 2019b) (Figure 3a). The Grain for Green programme promoted the abandonment of very degraded, sloping agricultural land and natural recolonization by diverse species (M. Liu et al, 2019aLiu et al, , 2019b, or change to conservation management (X. D. Song et al, 2019a;X. W. Song et al, 2019b).…”

Section: How Local Knowledge Improved Interpretation Of Czs Data On S...mentioning

confidence: 99%

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Achieving Sustainable Earth Futures in the Anthropocene by Including Local Communities in Critical Zone Science

Naylor,

Dungait,

Zheng

et al. 2023

Earth's Future

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Critical Zone Science (CZS) explores the deep evolution of landscapes from the base of the groundwater or the saprolite‐rock interface to the top of vegetation, the zone that supports all terrestrial life. Here we propose a framework for CZS to evolve further as a discipline, building on 1st generation CZOs in natural systems and 2nd generation CZOs in human‐modified systems, to incorporate human behaviour for more holistic understanding in a 3rd generation of CZOs. This concept was tested in the China‐UK CZO programme (2016–2020) that established four CZOs across China on different lithologies. Beyond conventional CZO insights into soil resources, biogeochemical cycling and hydrology across scales, surveys of farmers and local government officials led to insights into human‐environment interactions and key pressures affecting the socio‐economic livelihoods of local farmers. These learnings combined with the CZS data identified knowledge exchange (KE) opportunities to unravel diverse factors within the Land‐Water‐Food Nexus, that could directly improve local livelihoods and environmental conditions, such as reduction in fertilizer use, contributing toward Sustainable Development Goals (SDGs) and environmental policies. Through two‐way local KE, the local cultural context and socio‐economic considerations were more readily apparent alongside the environmental rationale for policy and local action to improve the sustainability of farming practices. Seeking solutions to understand and remediate CZ degradation caused by human‐decision making requires the co‐design of CZS that foregrounds human behavior and the opinions of those living in human modified CZOs. We show how a new transdisciplinary CZO approach for sustainable Earth futures can improve alignment of research with the practical needs of communities in stressed environments and their governments, supporting social‐ecological and planetary health research agendas and improving capacity to achieve SDGs.

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Effects of vegetation restoration types on soil erosion reduction of a shallow karst fissure soil system in the degraded karst areas of Southwestern China

et al. 2023

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Shallow karst fissures are the main hydrological paths, underground loss channels, and one of the most critical root habitats in fragile karst rocky desertification areas. Revegetation may alter the type of vegetation cover in fissures, resulting in changes to soil properties and erosion reduction. In this study, we evaluate the influence of revegetation on the soil erosion reduction of fissure‐soil–plant systems (FSPS) for three vegetation types (herbs, shrubs, and trees) in FSPS and use bare FSPS without vegetation as a control in a karst rocky desertification area. The results show that the soil physicochemical properties of FSFS degraded first and then improved after abandonment, resulting in the order of soil erosion reduction of FSPS with vegetation succession being: shrub < herb < bare < tree. Vegetation restoration can significantly improve the soil erosion resistance of the 10–20 cm soil layer in the fissure zone, making it stronger than that in the non‐fissure zone, thus reducing the risk of underground leakage on the slope. The results obtained in this study deepen our knowledge of the impact of vegetation restoration type on soil erosion reduction and has significant implications for guiding vegetation restoration and preventing underground leakage in karst areas.

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Rainfall driven transport of carbon and nitrogen along karst slopes and associative interaction characteristic

Cited by 18 publications

References 46 publications

Effects of vegetation restoration on carbonate‐derived laterite erodibility in karst mountain areas

Effects of vegetation restoration on carbonate‐derived laterite erodibility in karst mountain areas

Achieving Sustainable Earth Futures in the Anthropocene by Including Local Communities in Critical Zone Science

Effects of vegetation restoration types on soil erosion reduction of a shallow karst fissure soil system in the degraded karst areas of Southwestern China

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