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Soil characteristics and their potential thresholds associated with Scirpus mariqueter distribution on a reclaimed wetland coast

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Abstract

We studied various soil characteristics associated with Scirpus mariqueter growth and spatial heterogeneity in the Shanghai Nanhui Dongtan wetlands. In September and October 2015, 12 soil characteristics (soil organic carbon, total phosphorus, total nitrogen, nitrate, nitrite, ammonia, orthophosphate, pH, moisture content, particle size, salinity, and tidal elevation) were analyzed from 101 soil samples. The key factors affecting S. mariqueter spatial distribution were determined using canonical correspondence analysis and curve-fitting analysis. Results showed that vegetation indices of height, cover, density, and biomass were positively correlated (P < 0.05) with tidal flat elevation. S. mariqueter was mainly distributed at tidal flat elevations of 2.0–3.4 m. Plant coverage and density were positively correlated (P < 0.05) with total nitrogen and soil salinity. Based on the curve-fitting and independent samples t-test analyses, thresholds of total nitrogen, conductivity, and tidal flat elevation of soil were 0.5475 g/kg, 0.8368 μS/cm, and 2.75 m, respectively. This study provides critical data for future coastal wetland remediation worldwide.

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Acknowledgements

This work was supported by the National Key R&D Program of China (grant number 2017YFC0506002) and National Basic Research Program of China (grant number 2013CB430400).

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Authors and Affiliations

  1. College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, People’s Republic of China

    Chengwei Li, Yandong Tao, Meng Zhao, Kefeng Yu & Shubo Fang

  2. Institute of Wetlands Ecology, Life Science School, Nanjing University, Nanjing, 210093, People’s Republic of China

    Lingqian Xu

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  1. Chengwei Li
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  2. Yandong Tao
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  3. Meng Zhao
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  4. Kefeng Yu
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  5. Lingqian Xu
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Correspondence to Shubo Fang.

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Li, C., Tao, Y., Zhao, M. et al. Soil characteristics and their potential thresholds associated with Scirpus mariqueter distribution on a reclaimed wetland coast. J Coast Conserv 22, 1107–1116 (2018). https://doi.org/10.1007/s11852-018-0618-9

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  • DOI: https://doi.org/10.1007/s11852-018-0618-9

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