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Multivariate Spatial Structure of Secondary Forests in Tuyen Quang Province, Vietnam

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Abstract

Forest management relies on forest spatial structure, but studies on the spatial structure of Vietnamese forests are limited. Therefore, two one–hectare plots were established in tropical rainforest in Tuyen Quang province to evaluate the characteristics and spatial structures of plant communities. Descriptive statistics and species importance value indices were calculated for each plot. Then, to assess differences between plots, detrended correspondence analysis was applied. Species mingling, uniform angle, diameter dominance and carbon stock dominance indices were also computed to analyze forest spatial structures. The results indicated that 65–70% of trees occurred in areas with high diversity, and 55–58% of trees were randomly distributed. The number of dominant and non–dominant individuals, in terms of diameter and carbon stock, was similar at the stand level. In all estimated patterns, units with high species mixtures predominated. As biodiversity increased, the distribution of forest trees became more random. The quadrivariate distribution illustrated considerable differences between plots, the study area and other regions. Findings from multivariate distributions provide accurate information in each group of spatial indices and these can be used to select appropriate silvicultural measures for stand management.

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ACKNOWLEDGMENTS

The authors would like to thank Vietnam National University of Forestry (VNUF) and North–Earth Sub Forest Inventory and Planning Institute and their staff for financial support and field measurements. The authors also thank colleagues in Vietnam, Australia and Russia for their valuable contributions in order to complete this study.

Funding

This work was supported by ongoing institutional funding. No additional grants to carry out or direct this particular research were obtained.

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Authors and Affiliations

  1. Vietnam National University of Forestry, Xuan Mai, Chuong My, Hanoi, Vietnam

    Phung Van Khoa

  2. Department of Forest Inventory and Planning, Faculty of Forestry, Vietnam National University of Forestry, Xuan Mai, Chuong My, Hanoi, Vietnam

    Bui Manh Hung

  3. Centre for Crop and Food Innovation, Murdoch University, 90 South St., 6150, Murdoch, WA, Australia

    Bernard Dell

  4. North–Earth Sub Forest Inventory and Planning Institute, Vinh Yen, Vinh Phuc, Vietnam

    Nguyen Khac Vinh

  5. Center for Sustainable Forest Management and Remote Sensing, Volga State University of Technology, Yoshkar-Ola, Russia

    Eldar Kurbanov

  6. Faculty of Forestry, Vietnam National University of Forestry—Second Campus, Dong Nai, Vietnam

    Le Van Cuong

  7. Department of Soil Science, Faculty of Forestry, Vietnam National University of Forestry, Xuan Mai, Chuong My, Hanoi, Vietnam

    Nguyen Thi Bich Phuong

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  1. Phung Van Khoa
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Correspondence to Bui Manh Hung.

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Phung Van Khoa, Hung, B.M., Dell, B. et al. Multivariate Spatial Structure of Secondary Forests in Tuyen Quang Province, Vietnam. Biol Bull Russ Acad Sci 51, 396–409 (2024). https://doi.org/10.1134/S1062359023603932

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