Changes in cultivated land patterns and driving forces in the Three Gorges Reservoir area, China, from 1992 to 2015

Zhang, Yuxin; Wang, Yukuan; Fu, Bin; Li, Ming; Lu, Yafeng; Dixit, Amod Mani; Chaudhary, Suresh; Wang, Shan

doi:10.1007/s11629-019-5375-1

Cited by 15 publications

(9 citation statements)

References 48 publications

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“…During the period from the seedling stage to the end of the flowering period, its roots continuously absorb soil nutrients and increase rapidly (Chen et al 2019). At the same time, secretions and sloughs also provide sufficient nitrogen and carbon sources for microorganisms, which promote the increase of SMBC and SMBN in rhizosphere soil, and SMBN is higher ( Zhang et al 2020.…”

Section: Resultsmentioning

confidence: 99%

“…In view of the low fertility level, poor physical and chemical properties, and poor soil quality of newly added cultivated land, the present study was conducted the remediation of inferior forest land in the Loess Plateau as a starting point, combined with regional ecological restoration and the requirements of natural environment and economic development, and evaluated the quality of newly added cultivated land. Research on the promotion and cultivation of suitable crops were carried out by Wang et al (2019) and Zhang et al (2020).…”

Section: Introductionmentioning

confidence: 99%

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Effects of different vegetation on soil microbial biomass carbon and nitrogen in newly cultivated land

Li¹,

Zhang²

2021

Bangladesh J. Bot.

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Effects of plant growth on the soil quality and microbial biomass carbon and nitrogen of newlyincreased farmland, providing a scientific basis for the improvement of the newly cultivated land quality and crop selection were studied. Results showed that planting Rosa chinensis Jacq (R), Ardisia crenata Sims (A), Salvia miltiorrhiza (L) and Solanum lycopersicum (S) had significant effects on soil nutrients in cultivated land. The average content of microbial biomass carbon and nitrogen in the rhizosphere soil of the four plants were 91.74 - 138.55 and 17.24 - 79.42 mg/kg, 164.05 - 184.00 and 28.43 - 62.31 mg/kg, 58.26 - 73.26 and 27.04 - 51.48 mg/kg,183.47 - 282.00 and 24.89 - 35.94 mg/kg, respectively. The soil microbial biomass carbon presents as S > A > R > L at the seedling stage, and S > R > L > A at the flowering stage. Similarly, soil microbial biomass nitrogen presents as R > A > S > L at seedling stage and L > A > S > A at flowering stage. Results fully indicate that the biomass carbon and nitrogen of plants with short growth cycles of newly cultivated land have a small change in the biomass carbon and nitrogen. During the growth process of different vegetation, the changes in rhizosphere soil microbial biomass, carbon-nitrogen ratio and microbial entropy were significantly different. The low shrubs showed an increasing trend, root-growing Salvia miltiorrhiza decreased, while Solanum lycopersicum with the shortest growth cycle showed first increasing and then decreasing trend. Bangladesh J. Bot. 50(3): 879-886, 2021 (September) Special

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of different vegetation on soil microbial biomass carbon and nitrogen in newly cultivated land

Li¹,

Zhang²

2021

Bangladesh J. Bot.

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“…In recent years, some studies (such as Z. Li, Ma, et al, 2019; Q. Zhang, Wang, et al, 2020) have quantified the economic and ecological demands of the TG reservoir area from the perspective of the ecological environment, but few integrate the LU structure and resource changes with economic indicators. To bridge this gap, we extracted LU, natural, and sociodemographic data between 1990 and 2020 to quantify landscape dynamics.…”

Section: Introductionmentioning

confidence: 99%

Impacts of environmental and socioeconomic factors on gross ecosystem product of the Three Gorges reservoir area, China

Cheng,

Liu,

Huang

et al. 2024

Land Degrad Dev

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Environmental and socioeconomic drivers would alter landscapes, bringing various effects with different directions and magnitudes. Demonstrating these driving effects is key to relieving the conflicts between territorial vegetation restoration and regional economic growth. However, the relationship between ecological protection and economic development due to landscape dynamics has not been systematically demonstrated as environment is difficult to quantify by the monetary value. In this article, we explored the changes in gross ecosystem product (GEP) in the Three Gorges (TG) reservoir area and constructed a conceptual framework to explicate its driving mechanism. Our results suggested that topographic, soil, and climatic factors positively impact on GEP through their important effects on vegetation structure, distribution, and succession. Additionally, reforestation policies promote the conversion of farmland and grassland to forestland in the TG reservoir region, which was the main contributor to enhancing GEP. Conversely, socioeconomic factors negatively impact GEP, of which effects were mainly manifested by changes in the proportion of ecological land. Therefore, it is essential to maintain a suitable land use proportion in this region to optimize GEP, and we proposed a landscape restoration program to enhance four ecosystem productions. This article provides a reference for land resource allocation for environmental protection and sustainable development in ecologically fragile areas.

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“…Moreover, most studies have lacked the dynamics of evaluation results over long periods. At this stage, many researchers have studied the evolution of landscape patterns in the TGRA before and after water storage; and have focused on spatial granularity effects 48 , effects of forest restoration on soil erosion 49 ; and cropland patterns and driving forces 50 . Under the contexts of climate change, China’s “ecological civilization construction”, and economic and social transformation, how did the construction of the TGP affected the landscape element changes in the watershed?…”

Section: Introductionmentioning

confidence: 99%

Landscape change patterns at three stages of the construction and operation of the TGP

et al. 2021

Sci Rep

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Analyses of landscape change patterns that are based on elevation and slope can not only provide reasonable interpretations of landscape patterns but can also help to reveal evolutionary laws. However, landscape change patterns and their model in different landforms of the typical watershed in the Three Gorges Reservoir Area (TGRA) has not been quantified and assessed effectively. As a complex geographical unit, the ecological environment in the middle reach of the Yangtze River has experienced great changes due to the construction of the Three Gorges Project (TGP) and its associated human activities. Here, based mainly on a digital elevation model (DEM) and remotely sensed images from 1986, 2000, 2010, and 2017 and by using GIS technology, speeds/ trends of landscape change, the index of landscape type change intensity, landscape pattern indices, and landscape ecological security index, the spatial and temporal evolution characteristics of different elevations, slopes, and buffer landscape types were analyzed in typical watersheds, as well as an evolutionary model of the landscape pattern. The results indicated that (1) the landscape types along with the land classification and buffer zone that were influenced by the TGR construction have undergone a phased change, with the period 2000–2010 being the most dramatic period of landscape evolution during the impoundment period; (2) landscape type shifts from human-dominated farmland to nature-driven forestland and shrub-land as elevations, slopes and buffer distances increased. The landscape has shifted from diversity to relative homogeneity; (3) land types and buffer zones played essential roles in the landscape pattern index, which is reflected in the differences in landscape type indices for spatial extension and temporal characteristics. The results of this paper illustrate the spatial–temporal characteristics of various landscape types at three distinct stages in the construction of the TGR. These findings indicate that the landscape ecological security of the watershed is improving year by year. The follow-up development of the TGRA needs to consider the landscape change patterns of different landforms.

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Changes in cultivated land patterns and driving forces in the Three Gorges Reservoir area, China, from 1992 to 2015

Cited by 15 publications

References 48 publications

Effects of different vegetation on soil microbial biomass carbon and nitrogen in newly cultivated land

Effects of different vegetation on soil microbial biomass carbon and nitrogen in newly cultivated land

Impacts of environmental and socioeconomic factors on gross ecosystem product of the Three Gorges reservoir area, China

Landscape change patterns at three stages of the construction and operation of the TGP

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