期刊:
Journal of Hazardous Materials,2024年462:132730 ISSN:0304-3894
通讯作者:
Yang, Wen-Chao;Fang, Linchuan
作者机构:
[Ju, Wenliang] National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China;[Ju, Wenliang] School of Environment, Tsinghua University, Beijing 100084, China;[Liu, Ji] Hubei Province Key Laboratory for Geographical Process Analysis and Simulation, Central China Normal University, Wuhan 430079, China;[Liu, Ji] Department of Ecohydrology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin 12587, Germany;[Yang, Wen-Chao] National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China. Electronic address: wcyang@gzu.edu.cn
通讯机构:
[Yang, Wen-Chao] N;[Fang, Linchuan] C;National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China. Electronic address:;CAS Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi'an 710061, China. Electronic address:
摘要:
Revegetation is effective in improving soil quality in ecologically fragile areas. However, little is known about the impact of diverse phytomanagement strategies of tailings on soil quality and ecological security in erosion-prone areas. We investigated the water stability, soil aggregate nutrients, and the risk of heavy metal contamination of abandoned tailings under phytomanagement and in adjacent bare land on the Loess Plateau. The results showed that phytomanagement significantly enhanced soil aggregate stability, as demonstrated by higher contents of soil organic carbon (SOC), glomalin-related soil protein (GRSP), aromatic-C, and alkene-C in macro-aggregates. The pollution load index (PLI) and ecological risk index (RI) of soil heavy metals were lower in shrub/herbaceous mixed forests than in natural grasslands and planted forests. The risk of heavy metal contamination was higher in macro-aggregates (>0.25mm) than in micro-aggregates (<0.25mm) and was significantly and positively correlated with the SOC and GRSP contents of the aggregates. Our study demonstrates that soil aggregate quality is closely related to the fate of heavy metals. Diversified tailing revegetation measures can improve soil quality and ensure ecological security.
期刊:
Journal of Soils and Sediments,2024年 ISSN:1439-0108
通讯作者:
Liu, Muxing;Yi, J
作者机构:
[Yi, Jun; Lu, Shiguo; Liu, Muxing; Zhang, Hailin; Liu, MX; Wang, Weijie] Cent China Normal Univ, Key Lab Geog Proc Anal & Simulat Hubei Prov, Wuhan 430079, Peoples R China.;[Yi, Jun; Lu, Shiguo; Liu, Muxing; Zhang, Hailin; Liu, MX; Wang, Weijie] Cent China Normal Univ, Coll Urban & Environm Sci, Wuhan 430079, Peoples R China.;[Wan, Jinhong] Inst Water Resources & Hydropower Res, Beijing 100048, Peoples R China.
通讯机构:
[Yi, J ; Liu, MX] C;Cent China Normal Univ, Key Lab Geog Proc Anal & Simulat Hubei Prov, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Coll Urban & Environm Sci, Wuhan 430079, Peoples R China.
关键词:
Soil infiltration response;Forest conversion;Hillslope hydrology;Humid area
摘要:
PurposeUnderstanding the characteristics of soil infiltration response to rainfall is critical for soil water transport processes and hydrologic modeling. However, little is known about how they vary with forest conversion at different temporal stages (< 20 years) below the rooting zone. Therefore, this study aims to investigate soil infiltration response patterns in different subtropical forest conversion hillslopes, including mature original forest (thick root), young secondary forest (middle root), and very young secondary grassland (fine root), and analyzed the effects of environmental factors on the dynamics of soil infiltration.Materials and methodsSeveral metrics were evaluated to characterize and quantify the nature of these responses by estimating changes in the soil water content, the response time difference between two adjacent soil depths, and infiltration velocities for 1144 infiltration events at 6 locations on the three hillslopes.Results and discussionSoil infiltration responses were similar on both forestland hillslopes, yet significantly different from those on the grassland hillslope. The preferential flow was more evident in the profile of thick-rooted vegetation, and the velocity of the wetting front was faster in the profiles of middle- and fine-rooted vegetation. Topography and root characteristics interact to influence soil infiltration response at the hillslope scale.ConclusionsConversion from thick-rooted forests into fine-rooted grasslands altered the rainfall-related soil infiltration dynamics below the rooting zone. In particular, the occurrence of preferential flow and infiltration rates varied, which helps enhance our understanding of ecohydrological processes in the context of changing land use and hydroclimatic conditions.
期刊:
Journal of Soils and Sediments,2024年 ISSN:1439-0108
通讯作者:
Tian, P
作者机构:
[Ping, Yaodong; Tian, Pei; Guo, Yahui; Tian, P] Cent China Normal Univ, Key Lab Geog Proc Anal & Simulat Hubei Prov, Wuhan 430079, Peoples R China.;[Luo, Li] Northwest Agr & Forestry Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Peoples R China.;[Zhu, Zhanliang; Gong, Yuwei] Beijing Normal Univ, Coll Water Sci, Beijing 100091, Peoples R China.;[Cui, Yongsheng] Fujian Agr & Forestry Univ, Forestry Coll, Fuzhou 350002, Peoples R China.;[Chen, Lin] Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA.
通讯机构:
[Tian, P ] C;Cent China Normal Univ, Key Lab Geog Proc Anal & Simulat Hubei Prov, Wuhan 430079, Peoples R China.
关键词:
Soil erosion sensitivity;RUSLE;Deep learning-LSTM model;Geographic detector;Hilly areas of Hubei Province
摘要:
Purpose Hilly areas are highly susceptible to soil erosion. This study aims to discover the drivers of soil erosion, identify soil erosion-sensitive areas, and predict future soil erosion in typical hilly areas of Hubei Province, China, using combined RUSLE and LSTM models.Materials and methods In this study, soil erosion in hilly areas of Hubei Province from 2000 to 2020 was quantitatively analyzed using the revised universal soil loss equation (RUSLE), and the soil erosion sensitivity evaluation system was constructed, a geographic detector was employed to identify the main drivers of soil erosion sensitivity, and using the long short-term memory neural network model (LSTM) to predict soil erosion in 2025.Results and discussions The results showed that most areas were dominated by slight and moderate erosion. Slope and vegetation coverage were identified as the core elements influencing the space heterogeneity of soil erosion. Soil erosion sensitivity was mainly composed of moderate sensitivity, accounting for more than 70% of the total area. The strong and extreme sensitivity demonstrated a downward trend with the continued implementation of slope management and forest rehabilitation from slope agriculture, whereas the sensitivity was still higher in the northwest and southwest Hubei Province. Regions with severe soil erosion had high sensitivity, and the spatial distribution of the two is strongly coherent. Areas with surface relief > 300 m and vegetation cover < 30% had the highest sensitivity and should be highly valued. The percentage of moderate and higher soil erosion area in 2025 was 3.77% lower than in 2020, but severe erosion still exists in the northwest and southwest Hubei Province.Conclusions Soil erosion sensitivity in the western part of the study area was the highest, followed by the southeast, and the overall erosion sensitivity was gradually decreasing during the studied period. In the future, soil erosion intensity will show a downward trend, whereas the deployment of soil and water conservation measures in soil erosion-sensitive areas should still be strengthened. The results are helpful for accurate soil erosion control and prediction in the hilly areas of Hubei Province, China.
期刊:
Science of The Total Environment,2024年907:168094 ISSN:0048-9697
通讯作者:
Shen, Jianlin
作者机构:
[Wu, Jinshui; Jiang, Wenqian; Gong, Dianlin; Zhu, Qihong; Wang, Juan; Zhu, Xiao; Shen, Jianlin] Key Laboratory for Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;[Wu, Jinshui; Jiang, Wenqian; Gong, Dianlin; Zhu, Qihong; Wang, Juan; Zhu, Xiao; Shen, Jianlin] Changsha Research Station for Agricultural & Environmental Monitoring, Chinese Academy of Sciences, Changsha 410125, China;[Wu, Jinshui; Jiang, Wenqian; Zhu, Qihong] University of Chinese Academy of Sciences, Beijing 100049, China;[Shen, Jianlin] University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: jlshen@isa.ac.cn;[Li, Yong] University of Chinese Academy of Sciences, Beijing 100049, China
通讯机构:
[Shen, Jianlin] U;University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address:
摘要:
Over the past decade, China has experienced a decline in atmospheric reactive nitrogen (Nr) emissions. Given that China's subtropical region is a significant nitrogen (N) deposition hotspot, it is essential to accurately quantify the ten-year variations in dry and wet N depositions in the context of reductions in atmospheric Nr emissions. Here, we evaluated the spatiotemporal variation in N deposition on forest, paddy field and tea field ecosystems in a typical subtropical agricultural catchment from 2011 to 2020. Our findings indicated a significant decrease in total N deposition in both the tea field ecosystem (41.5-30.5kgNha(-1)) and the forest ecosystem (40.8-25.7kgNha(-1)) (P<0.05), but no significant change in the paddy field ecosystem (29.3-32.9kgNha(-1)). Specifically, dry N deposition exhibited significant declines except in the paddy field ecosystem, whereas wet N deposition had no significant change. The reduction in total oxidized and reduced N depositions in forest and tea field ecosystems is attributed to the decrease in NO(x) and NH(3) emissions. Additionally, The ratio of NH(x) deposition to total N deposition all exceeded 0.5 in three ecosystems and the NH(x)/NO(y) ratio had an increasing trend (P<0.05) in the paddy field, indicating that reactive N emissions from agricultural sources were the primary contributor to overall N deposition. Our study emphasizes that despite the decreasing trend in N deposition, it still exceeds the critical loads of natural ecosystems and requires stringent N emissions control, particularly from agricultural sources, in the future.
期刊:
Global Change Biology,2024年30(1):e17027 ISSN:1354-1013
通讯作者:
Fang, LC
作者机构:
[Fang, Linchuan; Ma, Dengke; Jin, Xiaolian; Fang, LC; Ju, Wenliang; Guo, Liang] Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess Pl, Minist Water Resources, Yangling 712100, Peoples R China.;[Ju, Wenliang] Tsinghua Univ, Sch Environm, Beijing, Peoples R China.;[Fang, Linchuan] Wuhan Univ Technol, Key Lab Green Utilizat Crit Nonmet Mineral Resourc, Minist Educ, Wuhan, Peoples R China.;[Shen, Guoting; Blagodatskaya, Evgenia] UFZ Helmholtz Ctr Environm Res, Dept Soil Ecol, Halle, Saale, Germany.;[Delgado-Baquerizo, Manuel; Zhou, Guiyao] Inst Recursos Nat & Agrobiol Sevilla IRNAS, Lab Biodivers & Funcionamiento Ecosistem, CSIC, Seville, Spain.
通讯机构:
[Fang, LC ] C;Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess Pl, Minist Water Resources, Yangling 712100, Peoples R China.
关键词:
carbon sequestration;grasslands;grazing exclusion;microbial communities and functions;nitrogen and phosphorus accumulation;soil aggregates
摘要:
We linked the soil microscale‐associated microbiomes with the carbon sequestration and biogeochemical cycling of livestock excluded grasslands for up to 36 years. Long‐term grazing exclusion reduced microbial diversity, community stability, and microbial functional genes associated with carbon sequestration and nutrient cycling. Moreover, we emphasize that the interaction between grazing exclusion and longevity as well as the structure of soil aggregates have substantial impacts the grassland biogeochemical cycles and global climate change in which the soil microbiome is involved. Abstract Grazing exclusion alters grassland soil aggregation, microbiome composition, and biogeochemical processes. However, the long‐term effects of grazing exclusion on the microbial communities and nutrient dynamics within soil aggregates remain unclear. We conducted a 36‐year exclusion experiment to investigate how grazing exclusion affects the soil microbial community and the associated soil functions within soil aggregates in a semiarid grassland. Long‐term (36 years) grazing exclusion induced a shift in microbial communities, especially in the <2 mm aggregates, from high to low diversity compared to the grazing control. The reduced microbial diversity was accompanied by instability of fungal communities, extended distribution of fungal pathogens to >2 mm aggregates, and reduced carbon (C) sequestration potential thus revealing a negative impact of long‐term GE. In contrast, 11–26 years of grazing exclusion greatly increased C sequestration and promoted nutrient cycling in soil aggregates and associated microbial functional genes. Moreover, the environmental characteristics of microhabitats (e.g., soil pH) altered the soil microbiome and strongly contributed to C sequestration. Our findings reveal new evidence from soil microbiology for optimizing grazing exclusion duration to maintain multiple belowground ecosystem functions, providing promising suggestions for climate‐smart and resource‐efficient grasslands.
关键词:
aridity;biogeography;climate change;deep soil;microbial biodiversity and function;soil depth;water heterogeneity
摘要:
Our results contribute to broader and deeper knowledge of climate change microbiology in deep soil environments under future climate scenarios. We proposes a potential mechanism for the association between climate aridity and deep soil microbes; that is, when the external aridity changes, water evapotranspiration (including plant transpiration and soil water evaporation) is directly and indirectly (e.g., changes in rooting depths and soil texture) affected, and a volumetric soil moisture gradient (related to soil porosity) is formed to primarily drive microorganisms in deep soil. Abstract Microbes inhabiting deep soil layers are known to be different from their counterpart in topsoil yet remain under investigation in terms of their structure, function, and how their diversity is shaped. The microbiome of deep soils (>1 m) is expected to be relatively stable and highly independent from climatic conditions. Much less is known, however, on how these microbial communities vary along climate gradients. Here, we used amplicon sequencing to investigate bacteria, archaea, and fungi along fifteen 18‐m depth profiles at 20–50‐cm intervals across contrasting aridity conditions in semi‐arid forest ecosystems of China's Loess Plateau. Our results showed that bacterial and fungal α diversity and bacterial and archaeal community similarity declined dramatically in topsoil and remained relatively stable in deep soil. Nevertheless, deep soil microbiome still showed the functional potential of N cycling, plant‐derived organic matter degradation, resource exchange, and water coordination. The deep soil microbiome had closer taxa–taxa and bacteria–fungi associations and more influence of dispersal limitation than topsoil microbiome. Geographic distance was more influential in deep soil bacteria and archaea than in topsoil. We further showed that aridity was negatively correlated with deep‐soil archaeal and fungal richness, archaeal community similarity, relative abundance of plant saprotroph, and bacteria–fungi associations, but increased the relative abundance of aerobic ammonia oxidation, manganese oxidation, and arbuscular mycorrhizal in the deep soils. Root depth, complexity, soil volumetric moisture, and clay play bridging roles in the indirect effects of aridity on microbes in deep soils. Our work indicates that, even microbial communities and nutrient cycling in deep soil are susceptible to changes in water availability, with consequences for understanding the sustainability of dryland ecosystems and the whole‐soil in response to aridification. Moreover, we propose that neglecting soil depth may underestimate the role of soil moisture in dryland ecosystems under future climate scenarios.
期刊:
Environmental Science and Pollution Research,2023年30(42):96329-96349 ISSN:0944-1344
通讯作者:
Yu, J
作者机构:
[Li, Yimin; Nie, Yan; Yin, Chen; Zhou, Yong; Yu, Lei] Cent China Normal Univ, Hubei Prov Key Lab Geog Proc Anal & Simulat, Wuhan 430079, Peoples R China.;[Li, Yimin; Qin, Hong; Nie, Yan; Yin, Chen; Zhou, Yong; Yu, Lei] Cent China Normal Univ, Coll Urban & Environm Sci, Wuhan 430079, Peoples R China.;[Yu, J; Yu, Jing] Hubei Univ, Hubei Key Lab Reg Dev & Environm Response, Wuhan 430062, Peoples R China.
通讯机构:
[Yu, J ] H;Hubei Univ, Hubei Key Lab Reg Dev & Environm Response, Wuhan 430062, Peoples R China.
关键词:
Arable land multifunction;Functional trade-offs;Root mean square deviation method;Ecological compensation;The West Mountain Regions of Hubei Province
期刊:
Science of The Total Environment,2023年892:164735 ISSN:0048-9697
通讯作者:
Li, J
作者机构:
[Liu, Qinhuo; Gu, Chenpeng; Dong, Yadong; Zhao, Jing; Li, Jing; Liu, Chang; Mumtaz, Faisal] Chinese Acad Sci, Aerosp Informat Res Inst, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China.;[Liu, Qinhuo; Gu, Chenpeng; Dong, Yadong; Zhao, Jing; Li, Jing; Liu, Chang; Mumtaz, Faisal] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.;[Gao, Jixi] Minist Ecol & Environm Peoples Republ China, Satellite Applicat Ctr Ecol & Environm, Beijing 100094, Peoples R China.;[Wang, Cong] Cent China Normal Univ, Sch Urban & Environm Sci, Key Lab Geog Proc Anal & Simulat Hubei Prov, Wuhan 430079, Peoples R China.
通讯机构:
[Li, J ] C;Chinese Acad Sci, Aerosp Informat Res Inst, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China.
关键词:
Leaf area index;Eurasian Steppe (EAS);ENSO;Vegetation change
摘要:
As the most influential atmospheric oscillation on Earth, the El Niño/Southern Oscillation (ENSO) can significantly change the surface climate of the tropics and subtropics and affect the high latitudes of northern hemisphere areas through atmospheric teleconnection. The North Atlantic Oscillation (NAO) is the dominant pattern of low-frequency variability in the Northern Hemisphere. As the dominant oscillations in the Northern Hemisphere, the ENSO and NAO have been affecting the giant grassland belt in the world, the Eurasian Steppe (EAS), in recent decades. In this study, the spatio-temporal anomaly patterns of grassland growth in the EAS and their correlations with the ENSO and NAO were investigated using four long-term leaf area index (LAI) and one normalized difference vegetation index (NDVI) remote sensing products from 1982 to 2018. The driving forces of meteorological factors under the ENSO and NAO were analyzed. The results showed that grassland in the EAS has been turning green over the past 36years. Warm ENSO events or positive NAO events accompanied by increased temperature and slightly more precipitation promoted grassland growth, and cold ENSO events or negative NAO events with cooling effects over the whole EAS and uneven precipitation decreased deteriorated the EAS grassland. During the combination of warm ENSO and positive NAO events, a more severe warming effect caused more significant grassland greening. Moreover, the co-occurrence of positive NAO with cold ENSO or warm ENSO with negative NAO kept the characteristic of the decreased temperature and rainfall in cold ENSO or negative NAO events, and deteriorate the grassland more severely.
期刊:
Critical Reviews in Environmental Science and Technology,2023年53(20):1795-1816 ISSN:1064-3389
通讯作者:
Linchuan Fang
作者机构:
[He, Haoran; Fang, Linchuan; Chao, Herong; Zeng, Yi; Chen, Li; Zhang, Zhiqin] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling, Peoples R China.;[He, Haoran; Duan, Chengjiao; Fang, Linchuan; Chao, Herong; Zeng, Yi; Chen, Li; Zhang, Zhiqin] Inst Soil & Water Conservat CAS & MWR, State Key Lab soil Eros & Dryland Farming Loess Pl, Yangling, Peoples R China.;[Wang, Fayuan] Qingdao Univ Sci & Technol, Coll Environm & Safety Engn, Qingdao, Peoples R China.;[Hu, Weifang] Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou, Peoples R China.;[Liu, Ji] Cent China Normal Univ, Hubei Prov Key Lab Geog Proc Anal & Simulat, Wuhan, Peoples R China.
通讯机构:
[Linchuan Fang] C;College of Natural Resources and Environment, Northwest A&F University, Yangling, China<&wdkj&>State Key Laboratory of soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation CAS and MWR, Yangling, China
关键词:
Arbuscular mycorrhizal fungi;bioaccumulation;crop growth;Jörg Rinklebe and Lena Q. Ma;meta-analysis;physiological activities;potentially toxic elements
摘要:
Soil pollution from potentially toxic elements (PTEs) is a serious environmental issue worldwide that affects agricultural safety and human health. Arbuscular mycorrhizal fungi (AMF), as ecosystem engineers, can alleviate PTE toxicity in crop plants. However, the comprehensive effects of AMF on crop performance in PTE-contaminated soils have not yet been recognized globally. Here, a meta-analysis of 153 studies with 3213 individual observations was conducted to evaluate the effects of AMF on the growth and PTE accumulation of five staple crops (wheat, rice, maize, soybean, and sorghum) in contaminated soils. Our results demonstrated that AMF had strong positive effects on the shoot and root biomass. This is because AMF can effectively alleviate oxidative damage induced by PTEs by stimulating photosynthesis, promoting nutrition, and activating non-enzymatic and enzymatic defense systems in crop plants. AMF also decreased shoot PTE accumulation by 23.6% and increased root PTE accumulation by 0.8%, demonstrating that AMF effectively inhibited the PTE transfer and uptake by crop shoot. Meanwhile, AMF-mediated effects on shoot PTE accumulation were weaker in soils with pH > 7.5. Overall, this global survey has essential implications on the ability of AMF to enhance crop performance in PTE-contaminated soils and provides insights into the guidelines for safe agricultural production worldwide.