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Is There Any Correlation Between Landscape Characteristics and Total Nitrogen in Wetlands Receiving Agricultural Drainages?

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Abstract

In the case of increasing fragmentation of wetlands, the study of the relationship between wetland landscape characteristics and total nitrogen (TN) in water is of great significance to reveal the mechanism of wetland water purification. Taking the Naoli River (NR) wetlands in Northeast China as the research object, 10 uniformly distributed sampling sites in the study area were sampled in August 2015 to test the TN concentration and interpret the images of NR wetlands in the same period. Taking the sampling site as the control point, the whole wetlands were divided into 10 regions, and the landscape index of each region was extracted. In order to reveal whether the landscape characteristics are related to the TN concentration in the wetlands water body, the landscape index and the TN concentration in the control point water body were analyzed by correlation analysis, step-by-step elimination analysis and path analysis to reveal whether the landscape characteristics are related to the TN concentration under wetlands receiving agricultural drainages. The results showed that the correlation coefficients between four area indexes or eight shape indexes and TN concentration did not reach a significant correlation level (P > 0.05), indicating that TN removal was not only determined by a single landscape index. The path coefficient of edge density (ED) index is −0.41, indicating that wetland patch connectivity is the primary factor of TN removal, and there is no relationship between the larger patch area and the higher TN removal. The removal of TN in wetlands is restricted by the synergistic effect of landscape area and shape characteristics.

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Authors and Affiliations

  1. College of Agriculture, Jilin Agricultural University, Changchun, 130118, China

    Han Yu

  2. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Science, Changchun, 130102, China

    Han Yu, Guodong Wang, Mingyang Sun & Ming Jiang

  3. College of Urban and Environmental Sciences, Changchun Normal University, Changchun, 130032, China

    Xiaodong Wang & Lijuan Chu

  4. School of Engineering, Edith Cowan University, Joondalup, 6027, Australia

    Guangzhi Sun

  5. College of Art and Design, Jilin Jianzhu University, Changchun, 130118, China

    Mingyang Sun

  6. Jilin Academy of Agriculture Sciences, Changchun, 130033, China

    Jingyu Wang

Authors
  1. Han Yu
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  2. Xiaodong Wang
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  3. Lijuan Chu
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  4. Guodong Wang
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  5. Guangzhi Sun
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  8. Ming Jiang
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Correspondence to Xiaodong Wang.

Additional information

Foundation item: Under the auspices of National Natural Science Foundations of China (No. 41620104005, 31500307, 41601263, 41771120), Technology Development Program of Jilin Province (No. 20180101082JC, 20180520085JC, 20190201256JC, 20190201018JC), Natural Science Foundation of Changchun Normal University (No. 2016-009) and Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences (No. IGA-135-05)

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Yu, H., Wang, X., Chu, L. et al. Is There Any Correlation Between Landscape Characteristics and Total Nitrogen in Wetlands Receiving Agricultural Drainages?. Chin. Geogr. Sci. 29, 712–724 (2019). https://doi.org/10.1007/s11769-019-1037-8

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  • DOI: https://doi.org/10.1007/s11769-019-1037-8

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