Divergent response of heavy metal bioavailability in soil rhizosphere to agricultural land use change from paddy field to various drylands

The heavy metal pollution induced by agricultural land use change has attracted great attention. In this study, the divergent response of bioavailability of heavy metals in rhizosphere soil to different...

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Sources, Spatial Distribution and Extent of Heavy Metals in Relation to Land Use, Lithology and Landform in Fuzhou City, China

Minerals ◽

10.3390/min11121325 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1325

Author(s):

Terefe Hanchiso Sodango ◽

Xiaomei Li ◽

Jinming Sha ◽

Jiali Shang ◽

Zhongcong Bao

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Land Use ◽

Spatial Distribution ◽

Human Activities ◽

Agricultural Land ◽

Total Carbon ◽

Agricultural Land Use ◽

Positive Correlations ◽

Cu And Zn

Assessing the spatial distribution of soil heavy metals in urban areas in relation to land use, lithology and landform may provide insights for soil quality monitoring. This study evaluated the spatial distribution, the sources and the extent of heavy metal(loid)s in the topsoil of Fuzhou city, China. A combination of GIS and multivariate approaches was used to determine the spatial distribution and the sources of heavy metals. Additionally, analysis of variance was used to determine the variability of selected heavy metals across land use, landform, and lithology. The result show that the mean concentrations of Cd, Zn, As and Pb were higher than background values. Most of the heavy metals had significant correlations with each other. In particular, V and Fe (0.84 at p < 0.01) and Ni and Cr (0.74 at p < 0.01) had strong correlations, while Cu and Fe (0.68 at p < 0.01), Cu and V (0.63 at p < 0.01), Cu and Co (0.52 at p < 0.01), Zn and Ni (0.51 at p < 0.01), Co and Fe (0.54 at p < 0.01), and Cu and Zn (0.55 at p < 0.01) had moderate correlations. Arsenic, Cu, and Zn had significant positive correlations with total nitrogen (TN). Similarly, arsenic, Zn and Cr had positive correlations with total carbon (TC), while Co had negative correlations with TN and TC at p < 0.01. The peak values for Cr, Ni, Pb, Mn, and Zn were observed in the intensively urbanized central and eastern parts of the study area, suggesting that the main sources might be anthropogenic activities. Agricultural land use had the highest content of Cd, which may be attributed to the historical long-term application of agrochemicals in the area. Additionally, its content was significantly higher in agricultural land use with shale lithology, implying that shale lithology was a key geogenic source for Cd of soils in the study area. Pb content was affected by urban land use, which may be attributed to intensive human activities such as emissions from vehicles, industrial effluents, mining activities, and other discharges. The results show the high spatial variability of heavy metal(loid)s, implying that the soils in the study area were highly influenced by both geogenic variability and human activities. Moreover, land use and lithology had significant impacts on the variability of Cd, As and Pb. Sustainable agricultural practices and urban management are recommended to sustain the eco-environment of coastal city.

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Agricultural land-use change and rotation system exert considerable influences on the soil antibiotic resistome in Lake Tai Basin

The Science of The Total Environment ◽

10.1016/j.scitotenv.2020.144848 ◽

2021 ◽

Vol 771 ◽

pp. 144848

Author(s):

Wei-Guo Zhang ◽

Tao Wen ◽

Li-Zhu Liu ◽

Jiang-Ye Li ◽

Yan Gao ◽

...

Keyword(s):

Land Use ◽

Land Use Change ◽

Agricultural Land ◽

Agricultural Land Use ◽

Rotation System

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800 Years of Agricultural Land-use Change in Asian (Eastern) Russia

KULUNDA: Climate Smart Agriculture - Innovations in Landscape Research ◽

10.1007/978-3-030-15927-6_6 ◽

2019 ◽

pp. 67-87 ◽

Cited By ~ 1

Author(s):

A. V. Prishchepov ◽

F. Schierhorn ◽

N. Dronin ◽

E. V. Ponkina ◽

D. Müller

Keyword(s):

Land Use ◽

Land Use Change ◽

Agricultural Land ◽

Agricultural Land Use ◽

Eastern Russia

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An open framework for agent based modelling of agricultural land use change

Environmental Modelling & Software ◽

10.1016/j.envsoft.2014.06.027 ◽

2014 ◽

Vol 61 ◽

pp. 19-38 ◽

Cited By ~ 42

Author(s):

Dave Murray-Rust ◽

Derek T. Robinson ◽

Eleonore Guillem ◽

Eleni Karali ◽

Mark Rounsevell

Keyword(s):

Land Use ◽

Land Use Change ◽

Agricultural Land ◽

Agricultural Land Use ◽

Agent Based ◽

Open Framework ◽

Agent Based Modelling

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Drivers of Agricultural Land-Use Change in Scotland

Understanding Land-Use and Land-cover Change in Global and Regional Context ◽

10.1201/9781482294477-18 ◽

2005 ◽

pp. 161-178

Keyword(s):

Land Use ◽

Land Use Change ◽

Agricultural Land ◽

Agricultural Land Use

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Effect of agricultural land-use change on ant dominance hierarchy and food preferences in a temperate oak forest

PeerJ ◽

10.7717/peerj.6255 ◽

2019 ◽

Vol 7 ◽

pp. e6255 ◽

Cited By ~ 2

Author(s):

Citlalli Castillo-Guevara ◽

Mariana Cuautle ◽

Carlos Lara ◽

Brenda Juárez-Juárez

Keyword(s):

Land Use ◽

Land Use Change ◽

Dominance Hierarchy ◽

Agricultural Land ◽

Food Preferences ◽

Cold Climate ◽

Agricultural Land Use ◽

Oak Forest ◽

Ant Communities ◽

Trade Off

Background The discovery-dominance trade-off is the inverse relationship between the ability of a species to discover resources and the species’ dominance of those resources; a paradigm used to explain species coexistence in ant communities dependent on similar resources. However, factors such as stress (e.g., temperature) or disturbance (e.g., removal of biomass) associated with the change in land use, can modify this trade-off. Here, we aimed to determine the potential effects of land use change on dominance hierarchy, food preferences and on the discovery-dominance trade-off. Methods An experiment with baits was used to investigate the dominance hierarchies of ant communities in a temperate mountain habitat in central Mexico. We evaluated the dominance index (DI), food preferences and discovery-dominance trade-offs of ants inhabiting two types of vegetation: a native oak forest and agricultural land resulting from agricultural land use and grazing. Results The ant communities in both environments were comprised of three species of ants (Monomorium minimum, Myrmica mexicana, and Camponotus picipes pilosulus), four morphospecies (Pheidole sp.1 and Pheidole sp.2, Temnothorax sp. and Lasius sp.) and one genus (Formica spp.). All Formicidae showed values of intermediate to low DI, and this factor did not seem to be influenced by the change in land use. Ants in the modified vegetation (i.e., agricultural land) were found to be numerically greater. Overall, a higher number of visits were registered to the tuna bait, although the duration of foraging events to the honey baits was longer. However, foraging times were dependent on the species considered: the generalized Myrmicinae, M. minimum, the ant species with highest DI, foraged for longer periods of time in the agricultural land and on the tuna bait. Meanwhile, the cold-climate specialist Formica spp., with a lower DI, foraged for longer periods of time in the oak (although not significant) and on the honey bait. We found little evidence of the discovery-dominance trade-off; instead, we found considerable diversity in the strategies used by the different species to access resources. This range of strategies is well represented by the generalized Myrmicinae M. minimum, the cold-climate specialists Formica spp. and Temnothorax sp., and the rare species, as the cold climate specialist Lasius sp. (insinuators). Conclusions Our evaluation shows that transformation of the original habitat does not appear to affect the hierarchical dominance of the ant communities, but it does affect their food preferences. Species with higher DI values such as the generalized Myrmicinae are more skilled at resource acquisition in modified habitats. Our results suggest that change in land use promotes an increase in the diversity of foraging strategies used by different ant species. This diversity may contribute to resource partitioning which favors coexistence.

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Impact Imposed by Urbanization on Soil Heavy Metal Content of Lake Wetland and Evaluation of Ecological Risks in East Dongting Lake in China

10.21203/rs.3.rs-339557/v1 ◽

2021 ◽

Author(s):

Yang Lin ◽

Kai Luo ◽

Zilin Su ◽

Yang Wu ◽

Wei Xiao ◽

...

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Land Use ◽

Metal Content ◽

Agricultural Land ◽

Research Area ◽

Dongting Lake ◽

Heavy Metal Content ◽

Ecological Risks ◽

Positive Correlation

Abstract The urbanization is regarded as the major factor related to human activities that may interfere with the natural ecosystem. In this study, we have selected the wetland of East Dongting Lake as the research area. We have collected 180 soil samples (within the range of 0–20 cm, and 20cm-40cm), and we have measured the contents of their physicochemical properties (including salinity, pH value, soil particle composition, soil organic carbon, nitrate nitrogen and rapidly available phosphorus) as well as heavy metal elements (including As, Hg, Cd, Pb, Ni and Cr). We have adopted the methods of multivariate statistical analysis and inverse distance weighted (IDW) interpolation, so as to to reveal the sources and distribution characteristics of heavy metal content in soil in the research area. By adopting the potential ecological risk index (PERI) method proposed by Hakanson, we intend to assess the PERI values of heavy metals. Our research findings have shown that: (1) 8 sorts of heavy metals have shown positive correlation with each other. As, Hg and Zn have shown a significantly positive correlation with SOC (P < 0.01); As, Ni, Cr and Zn have shown a significantly positive correlation with AP (P < 0.01); As and Pb have shown a significantly positive correlation with Clay (P < 0.01); whereas Hg and Zn have shown a significantly negative correlation with Silt (P < 0.01); As and Pb have shown a significantly negative correlation with Sand (P < 0.01). (2) During urbanization, the elements of Cd, Ni, As, Hg and Pb might be enriched due to agricultural and industrial activities, whereas the use of fertilizers and pesticides constitute one of the major factors contributing to the increase of Cd and Pb contents in soil. (3) Influenced by the varying land patterns and with exception to Cu, the Fe-normalized concentrations have shown significant variations among different types of land use (P < 0.05). Specifically, there is a significantly higher level of Cd, Zn, Pb and Hg contents in the agricultural land than other types of land use, whereas there is a slightly higher level of heavy metal content in the mudflats than that in the grassland. In addition, the content of heavy metals in woodland remains relatively stable, and with exception to As, the content of heavy metals in woodland is the lowest among the five types of land. (4) The average value of the comprehensive PERI in heavy metals amounts to 555.03, representing a strong degree of ecological risks. Specifically, the proportion of sampling points of Cd that have a high level of ecological risks amounts to 36.51%, which is the primary element contributing to heavy metal pollution in the region, especially in the agricultural land.

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DAMPAK PERUBAHAN PENGGUNAAN LAHAN PERTANIAN TERHADAP SOSIAL EKONOMI PETANI SEKITAR LOKASI PERTAMBANGAN BANYU URIP KECAMATAN GAYAM KABUPATEN BOJONEGORO

Jurnal Tataloka ◽

10.14710/tataloka.20.1.50-64 ◽

2018 ◽

Vol 20 (1) ◽

pp. 50

Author(s):

Aziz Bahtiar Rifa’i ◽

Fadjar Hari Mardiansjah

Keyword(s):

Land Use ◽

Land Use Change ◽

Agricultural Land ◽

Positive Impact ◽

Arable Land ◽

Mining Area ◽

Agricultural Land Use ◽

Socioeconomic Conditions ◽

Qualitative Approaches ◽

The Impact

This study examines the impact of agricultural land use change into a petroleum mining area to farmers’ socioeconomic conditions around petroleum mining project area in Gayam District of Kabupaten Bojonegoro. The analyses used a mix method, using both quantitative and qualitative approaches. The quantitative approach is used to determine the impact of agricultural land use change on the social and economic aspects with the respondent farmers were supported with a scoring method to determine the condition of socioeconomic vulnerability of farmers, while the qualitative approach carried out through in-depth interviews to some informants who have been affected by the project. The results shows that the presence of the petroleum mining industry has not had a positive impact yet on the farmers’ socioeconomic conditions. By the 700 hectares of agricultural land conversion, the agricultural production capacity of the area tends to decrease, including by the decreasing of the productivity of some agricultural land in a radius of 500 m from the fenceof the mining area as they are affected by the fence’s spotlight. The farmers' income also tends to decrease because of the decreasing of their working hours as the big loss of agricultural land in the area. As a result, many farmers should work outside of the area to search replacement of the arable land. These situations lead to a moderate condition of social and economic vulnerability for the farmers, especially for those who still have sufficient assets to meet the needs of their economic.

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