LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 11

Search options

  1. Article ; Online: Evaluating multifaceted effects of watershed properties and human activities on drought propagation in the Wei River Basin with an integrated framework.

    Mao, Ruichen / Li, Bingjie / Song, Jinxi / Li, Qi / Li, Nan / Long, Yongqing / Feng, Jiayuan

    The Science of the total environment

    2024  Volume 926, Page(s) 171712

    Abstract: Understanding the factors driving propagation from meteorological to hydrological drought is crucial for drought mitigation. In this study, an integrated framework based on the Soil and Water Assessment Tool model, standardised drought indices and ... ...

    Abstract Understanding the factors driving propagation from meteorological to hydrological drought is crucial for drought mitigation. In this study, an integrated framework based on the Soil and Water Assessment Tool model, standardised drought indices and Geographical Detector were used to investigate how and to what extent watershed properties and human activities affect the spatial heterogeneity of drought propagation in the Wei River Basin, a typical arid and semi-arid region in China. Results indicated that (1) spatially, the propagation times increased from southwest to northeast. Seasonally, the propagation was shorter and stronger in summer and autumn. (2) The aridity index significantly affected the spatial distribution of drought propagation time for the entire basin, especially in summer, while human activities primarily drove spatial distribution in the sub-basins. The explanatory power of any two independent factors was non-linearly enhanced after the interaction. (3) Watershed properties potentially impacted the anthropogenic driving factor of drought propagation. Strong anthropogenic effects on drought propagation often occurred in watersheds with moderate drought levels, steep slopes, low elevations, and small areas, and the key factors varied seasonally. These findings help elucidate the multifaceted effects of watershed properties and human activities on drought propagation. The proposed framework and the results of this study provide valuable guidance for formulating precise drought control strategies in the Wei River Basin and worldwide.
    Language English
    Publishing date 2024-03-15
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2024.171712
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: Dynamic Changes in Groundwater Level under Climate Changes in the Gnangara Region, Western Australia

    Kong, Feihe / Xu, Wenjin / Mao, Ruichen / Liang, Dong

    Water. 2022 Jan. 08, v. 14, no. 2

    2022  

    Abstract: The groundwater-dependent ecosystem in the Gnangara region is confronted with great threats due to the decline in groundwater level since the 1970s. The aim of this study is to apply multiple trend analysis methods at 351 monitoring bores to detect the ... ...

    Abstract The groundwater-dependent ecosystem in the Gnangara region is confronted with great threats due to the decline in groundwater level since the 1970s. The aim of this study is to apply multiple trend analysis methods at 351 monitoring bores to detect the trends in groundwater level using spatial, temporal and Hydrograph Analysis: Rainfall and Time Trend models, which were applied to evaluate the impacts of rainfall on the groundwater level in the Gnangara region, Western Australia. In the period of 1977–2017, the groundwater level decreased from the Gnangara’s edge to the central-north area, with a maximum trend magnitude of −0.28 m/year. The groundwater level in 1998–2017 exhibited an increasing trend in December–March and a decreasing trend in April–November with the exception of September when compared to 1978–1997. The rainfall + time model based on the cumulative annual residual rainfall technique with a one-month lag during 1990–2017 was determined as the best model. Rainfall had great impacts on the groundwater level in central Gnangara, with the highest impact coefficient being 0.00473, and the impacts reduced gradually from the central area to the boundary region. Other factors such as pine plantation, the topography and landforms, the Tamala Limestone formation, and aquifer groundwater abstraction also had important influences on the groundwater level.
    Keywords aquifers ; climate ; ecosystems ; groundwater extraction ; hydrograph ; landforms ; limestone ; models ; rain ; topography ; water ; water table ; Western Australia
    Language English
    Dates of publication 2022-0108
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2521238-2
    ISSN 2073-4441
    ISSN 2073-4441
    DOI 10.3390/w14020162
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  3. Article ; Online: Analysis and simulation of the driving mechanism and ecological effects of land cover change in the Weihe River basin, China.

    Xu, Wenjin / Song, Jinxi / Long, Yongqing / Mao, Ruichen / Tang, Bin / Li, Bingjie

    Journal of environmental management

    2023  Volume 344, Page(s) 118320

    Abstract: Land cover change (LCC) is both a consequence and a cause of global environmental change. This paper attempts to construct a framework to reveal the driving mechanism and ecological effects of different ecological factors under LCC and to explore the ... ...

    Abstract Land cover change (LCC) is both a consequence and a cause of global environmental change. This paper attempts to construct a framework to reveal the driving mechanism and ecological effects of different ecological factors under LCC and to explore the ecological characteristics of future LCC. A rule-mining framework based on a land expansion analysis strategy (LEAS) in the patch-generating land use simulation (PLUS) model was used to analyze the drivers of LCC. Neighborhood analysis and ecological effect index were used to investigate multiple ecological effects of LCC. Remote sensing-based ecological indices (RSEI) and the PLUS and stepwise regression model were introduced to explore and predict the integrated ecological effect of LCC. Focusing on the Weihe River basin, study's main drivers of LCC were precipitation, temperature, elevation, population, water table depth, proximity to governments and motorways, GDP, and topsoil organic carbon were the main drivers of LCC. Change directionality were similar for the effects of greenness and biomass formation but opposite for summertime and wintertime temperature. In addition, the conversion of land cover types to cropland had the most significant integrated ecological effect, followed by forest, grassland-shrubland, and other types. The RSEI is predicted to rise to 0.77 in 2030, and the areas where the ecological quality grade will improve and decrease are concentrated on the east and west sides of Ziwuling Mountain, respectively. The findings of this study have practical significance for land management and ecological protection.
    MeSH term(s) Rivers ; Environmental Monitoring ; Forests ; China ; Remote Sensing Technology ; Ecosystem ; Conservation of Natural Resources
    Language English
    Publishing date 2023-06-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.118320
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Response of the runoff process to meteorological drought: Baseflow index as an important indicator.

    Mao, Ruichen / Shi, Aying / Song, Jinxi / Xu, Wenjin / Tang, Bin / Li, Bingjie

    Journal of environmental management

    2023  Volume 345, Page(s) 118843

    Abstract: Runoff and baseflow are two hydrological elements most closely involved in water-resource management. Defining the response of runoff/baseflow to meteorological drought (MD) is helpful for designing precise drought resisting measures. Thus, Pearson ... ...

    Abstract Runoff and baseflow are two hydrological elements most closely involved in water-resource management. Defining the response of runoff/baseflow to meteorological drought (MD) is helpful for designing precise drought resisting measures. Thus, Pearson correlation coefficients and mutual information scores between runoff/baseflow and MD in five sub-basins of the Weihe River Basin (WRB) were estimated on a weekly scale, and the best response times of runoff/baseflow to MD on annual and calendar months were determined according to the maximum degree of response. Furthermore, the spatial and seasonal differences in response characteristics in the WRB were discussed and the baseflow index (BFI) was introduced to further explain the propagation process of MD to runoff/baseflow. The results showed that (1) in addition to the response time, the transition sequences of MD propagating to runoff and baseflow varied across basins due to the specific basin properties; (2) Response time of runoff to MD was related to BFI value and showed significant seasonality and hydrological periodicity. In summer and autumn (wet season), the response was faster and stronger, whereas the opposite occurred in winter and spring (normal/dry season); (3) BFI values indicated the main path of drought propagation, explaining the variation in response time between basins and seasons; hence, it can be used to simply and effectively determine the propagation speed of MD to runoff. This study clarified the response characteristics of the runoff process to MD and enhanced our understanding of the drought propagation process, which is crucial for mitigating and managing drought-related hazards.
    MeSH term(s) Droughts ; Seasons ; Meteorology ; Rivers ; Hydrology
    Language English
    Publishing date 2023-08-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.118843
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: With spatial distribution, risk evaluation of heavy metals and microplastics to emphasize the composite mechanism in hyporheic sediments of Beiluo River.

    Li, Bingjie / Song, Jinxi / Guan, Mingchang / Chen, Zeyu / Tang, Bin / Long, Yongqing / Mao, Ruichen / Zhao, Jiawei / Xu, Wenjin / Zhang, Yuting

    Journal of hazardous materials

    2023  Volume 462, Page(s) 132784

    Abstract: This study aimed to assess the hazardous impacts of heavy metals (HMs) enrichment on the surface of microplastics (MPs) in the hyporheic zone. The present work analyzed the spatial distribution and risk evaluation of HMs (V, Cr, Mn, Co, Ni, Cu, Zn, As, ... ...

    Abstract This study aimed to assess the hazardous impacts of heavy metals (HMs) enrichment on the surface of microplastics (MPs) in the hyporheic zone. The present work analyzed the spatial distribution and risk evaluation of HMs (V, Cr, Mn, Co, Ni, Cu, Zn, As, Cd, and Pb) and MPs and the mechanism of HMs enrichment on MPs in the sediments. The highest rates of contamination were for Cd, Pb, and As. The main types of MPs were fiber, blue, and a size smaller than 500 µm. The lower reaches of the Beiluo River had the most serious HMs and MPs pollution, especially BL-10 (HMs: CF-Cd, 41.91; EF-Cd, 50.87; Igeo-Cd, 4.80; RI, 1291; P
    Language English
    Publishing date 2023-10-13
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1491302-1
    ISSN 1873-3336 ; 0304-3894
    ISSN (online) 1873-3336
    ISSN 0304-3894
    DOI 10.1016/j.jhazmat.2023.132784
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: The ecohydrological effects of climate and landscape interactions within the Budyko framework under non-steady state conditions

    Huang, Peng / Song, Jinxi / Wu, Qiong / Sun, Haotian / Mao, Ruichen / Cheng, Dandong / Zhang, Jiaxiong / Shi, Yuna

    Catena. 2022 Oct., v. 217 p.106481-

    2022  

    Abstract: Catchment water yield is controlled by the partitioning of precipitation into evapotranspiration, runoff, and water storage changes. As one form of the Budyko framework, Fu's equation has been widely employed to estimate the influences of climatic ... ...

    Abstract Catchment water yield is controlled by the partitioning of precipitation into evapotranspiration, runoff, and water storage changes. As one form of the Budyko framework, Fu's equation has been widely employed to estimate the influences of climatic factors and landscape characteristics on the precipitation partitioning, with a single parameter ω reflecting the integrated ecohydrological effects of these influencing factors. However, the ecohydrological effects under non-steady state conditions are not fully understood owing to the complex hydrological and ecological processes at finer spatial and temporal scales. In addition, the finer spatial and temporal scales limit the application of the Budyko framework, since the original framework assumes that water storage changes are negligible. In this study, combining two hydrological models (the abcd model and GR2M model) and Fu's equation based on an extended Budyko framework, we estimated the ecohydrological effects of climatic factors and landscape characteristics under non-steady state conditions for 59 small catchments (≤9805 km²) in Qinba Mountains. The outputs of the two hydrological models exist good consistency with satellite-based data, with NSE exceeding 0.5 in 93% and 97% of catchments, respectively. Factors influencing the precipitation partitioning vary with timescale and exhibit greater variability at intra-annual scales. Moreover, the hydrological effects of these time-varying factors are influenced by catchment characteristics (R² ranging from 0.01 to 0.68), implying the precipitation partitioning is controlled by the ecohydrological interactions of climate and landscape at different timescales.
    Keywords catenas ; climate ; equations ; evapotranspiration ; hydrologic cycle ; landscapes ; models ; runoff ; satellites ; water storage ; water yield ; watersheds ; Budyko framework ; Ecohydrological processes ; Non-steady state ; Qinba Mountains
    Language English
    Dates of publication 2022-10
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 519608-5
    ISSN 1872-6887 ; 0008-7769 ; 0341-8162
    ISSN (online) 1872-6887 ; 0008-7769
    ISSN 0341-8162
    DOI 10.1016/j.catena.2022.106481
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  7. Article ; Online: Identifying and mapping potential groundwater-dependent ecosystems for a semi-arid and semi-humid area in the Weihe River, China

    Xu, Wenjin / Kong, Feihe / Mao, Ruichen / Song, Jinxi / Sun, Haotian / Wu, Qiong / Liang, Dong / Bai, Haifeng

    Journal of Hydrology. 2022 June, v. 609 p.127789-

    2022  

    Abstract: Identifying and mapping of potential groundwater-dependent ecosystems (pGDEs) are pivotal to well understanding of the interaction between groundwater and ecosystem as well as rational allocation of regional water resources. As the largest tributary of ... ...

    Abstract Identifying and mapping of potential groundwater-dependent ecosystems (pGDEs) are pivotal to well understanding of the interaction between groundwater and ecosystem as well as rational allocation of regional water resources. As the largest tributary of the Yellow River with complex landscape types, the Weihe River basin is an essential region for both water and sediment management in the Yellow River basin. However, either the distribution of pGDEs or the role of groundwater in ecosystems of the Weihe River basin has been largely unexplored. In this study, focused on the Weihe River basin, the framework for identifying and mapping of pGDEs was suggested to perform hierarchical grade based on the coupling of NDVI classification method and Groundwater-dependent Ecosystem Mapping (GEM) method. Moreover, the identification and mapping of pGDEs were validated based on statistical analyses among Normalized Difference Vegetation Index (NDVI), water table depth (WTD), previous month’s precipitation (Pₚₘ), evapotranspiration (ET), and precipitation (P). The spatial patterns of pGDEs obtained from mapping are generally consistent with those from validation, and the differences of pGDEs in the Weihe River distributed largely. The pGDEs group of “Likely” and “Very Likely” accounted for 22.5% of the basin, and mainly distributed in Ziwuling Mountains, Qinling Mountains, Liupan Mountains, and Huanglong Mountains, and the “Neutral” group was scattered in the loess area of the northwestern basin, accounting for 13%. The finding of this study promotes the development of the GDEs identification and provides references for water and ecosystem regulation and protection of the Weihe River basin as well as other similar basins.
    Keywords basins ; ecosystems ; evapotranspiration ; groundwater ; landscapes ; loess ; normalized difference vegetation index ; rivers ; water table ; watersheds ; China ; Yellow River ; Potential groundwater-dependent ecosystems ; Remote sensing ; GEM method ; Statistical analysis ; the Weihe River basin
    Language English
    Dates of publication 2022-06
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 1473173-3
    ISSN 1879-2707 ; 0022-1694
    ISSN (online) 1879-2707
    ISSN 0022-1694
    DOI 10.1016/j.jhydrol.2022.127789
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  8. Article: Quantitative assessment of driving factors affecting human appropriation of net primary production (HANPP) in the Qilian Mountains, China

    Qin, Xin / Liu, Wenbin / Mao, Ruichen / Song, Jinxi / Chen, Yaning / Ma, Chi / Li, Mingyue

    Ecological indicators. 2021 Feb., v. 121

    2021  

    Abstract: The combined effects of climate change and human activities pose threat to the sustainable development of ecosystems. Human appropriation of net primary production (HANPP) has been extensively used as an important indicator for evaluating the sustainable ...

    Abstract The combined effects of climate change and human activities pose threat to the sustainable development of ecosystems. Human appropriation of net primary production (HANPP) has been extensively used as an important indicator for evaluating the sustainable development of the ecosystem. However, few studies quantitatively assessed the driving factors of HANPP. Based on Moderate-Resolution Imaging Spectroradiometer (MODIS) data, methods of net primary production (NPP) model and regression analysis, the spatial and temporal distribution of HANPP and its driving factors in the Qilian Mountains from 2005 to 2015 were illustrated. The results showed that the HANPP in the Qilian Mountains decreased gradually from both east to west and from south to north, showing a slight upward overall. The regions affected by human activities and climate change accounted for 26.8% and 73.2% respectively. Moreover, there was a significant negative impact between grain yield and HANPP, and a significant positive impact of either the annual sunshine duration, or livestock amount to HANPP.
    Keywords climate change ; ecosystems ; grain yield ; humans ; livestock ; models ; net primary productivity ; regression analysis ; solar radiation ; sustainable development ; China
    Language English
    Dates of publication 2021-02
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 2036774-0
    ISSN 1872-7034 ; 1470-160X
    ISSN (online) 1872-7034
    ISSN 1470-160X
    DOI 10.1016/j.ecolind.2020.106997
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  9. Article: Assessment of aquatic ecological health based on determination of biological community variability of fish and macroinvertebrates in the Weihe River Basin, China

    Wu, Jintao / Mao, Ruichen / Li, Mingyue / Xia, Jun / Song, Jingxi / Cheng, Dandong / Sun, Haotian

    Journal of environmental management. 2020 Aug. 01, v. 267

    2020  

    Abstract: A healthy aquatic ecosystem plays an important role in the operation of nature and the survival of human beings. Understanding the mechanism of its interaction with the habitat process is conducive to formulating targeted ecological recovery plans. In ... ...

    Abstract A healthy aquatic ecosystem plays an important role in the operation of nature and the survival of human beings. Understanding the mechanism of its interaction with the habitat process is conducive to formulating targeted ecological recovery plans. In this study, fish and macroinvertebrates were collected from 49 investigation sites in the Weihe River basin, China, during periods of the summer and the autumn of 2017. Cluster analysis and canonical correlation analysis (CCA) were used to analyze the similarity of community distribution of fish and macroinvertebrates and their response to environmental variables. The biological integrity index of fish (F-IBI) and benthic-macroinvertebrate (B-IBI) was introduced to evaluate the aquatic ecological health. The results showed that fish communities were more coherent than macroinvertebrate communities. The distinguished response to ecological factors was identified for fish and macroinvertebrates. The ecological factors of total nitrogen, conductivity and river width have significant effects on both fish and macroinvertebrate communities. In addition, the fish community was significantly influenced by chlorine, fluorine, pH and flow velocity, while the macroinvertebrate community was significantly influenced by bicarbonate and water depth. The differences in community structure and response to ecological factors between communities were amplified in their environmental quality scores. Although F-IBI and B-IBI tend to be consistent temporally, the correlation is not significant. B-IBI showed decreasing gradient of ecological health status in the downstream area, while F-IBI tended to be different across river systems, which further illustrated the differences in the response of fish and macroinvertebrates to environmental variables.
    Keywords aquatic ecosystems ; autumn ; bicarbonates ; chlorine ; cluster analysis ; community structure ; environmental health ; environmental management ; environmental quality ; fish ; fish communities ; fluorine ; habitats ; health status ; humans ; macroinvertebrates ; multivariate analysis ; pH ; rivers ; summer ; total nitrogen ; watersheds ; China
    Language English
    Dates of publication 2020-0801
    Publishing place Elsevier Ltd
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2020.110651
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  10. Article ; Online: Assessment of aquatic ecological health based on determination of biological community variability of fish and macroinvertebrates in the Weihe River Basin, China.

    Wu, Jintao / Mao, Ruichen / Li, Mingyue / Xia, Jun / Song, Jingxi / Cheng, Dandong / Sun, Haotian

    Journal of environmental management

    2020  Volume 267, Page(s) 110651

    Abstract: A healthy aquatic ecosystem plays an important role in the operation of nature and the survival of human beings. Understanding the mechanism of its interaction with the habitat process is conducive to formulating targeted ecological recovery plans. In ... ...

    Abstract A healthy aquatic ecosystem plays an important role in the operation of nature and the survival of human beings. Understanding the mechanism of its interaction with the habitat process is conducive to formulating targeted ecological recovery plans. In this study, fish and macroinvertebrates were collected from 49 investigation sites in the Weihe River basin, China, during periods of the summer and the autumn of 2017. Cluster analysis and canonical correlation analysis (CCA) were used to analyze the similarity of community distribution of fish and macroinvertebrates and their response to environmental variables. The biological integrity index of fish (F-IBI) and benthic-macroinvertebrate (B-IBI) was introduced to evaluate the aquatic ecological health. The results showed that fish communities were more coherent than macroinvertebrate communities. The distinguished response to ecological factors was identified for fish and macroinvertebrates. The ecological factors of total nitrogen, conductivity and river width have significant effects on both fish and macroinvertebrate communities. In addition, the fish community was significantly influenced by chlorine, fluorine, pH and flow velocity, while the macroinvertebrate community was significantly influenced by bicarbonate and water depth. The differences in community structure and response to ecological factors between communities were amplified in their environmental quality scores. Although F-IBI and B-IBI tend to be consistent temporally, the correlation is not significant. B-IBI showed decreasing gradient of ecological health status in the downstream area, while F-IBI tended to be different across river systems, which further illustrated the differences in the response of fish and macroinvertebrates to environmental variables.
    MeSH term(s) Animals ; Biota ; China ; Ecosystem ; Environmental Monitoring ; Invertebrates
    Language English
    Publishing date 2020-04-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2020.110651
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top