China Danxia

World Heritage Research

Discover scientific research and academic studies that deepen our understanding of China Danxia from its history and significance to its conservation, management, and contemporary challenges.

• Camellia shangshii (Theaceae), a new species endemic to danxia landscape from Guangdong Province, China

  Researchers have identified Camellia shangshii, a new species of tea plant endemic to the danxia landscapes of Danxiashan Mountain, Guangdong Province, China. This discovery was confirmed through morphological analysis and phylogenetic studies using chloroplast genomes, revealing that C. shangshii is closely related to C. grijsii but distinguished by unique traits such as connate petals at the base, smaller leaves, and fewer bracteoles and sepals. The study integrates both genetic and physical characteristics to validate its recognition as a new species within the Camellia sect. Paracamellia. This finding contributes to the understanding of biodiversity in UNESCO-listed danxia landscapes and highlights the importance of these unique geological formations as hotspots for plant endemism.

  Wang, S., Liu, H., Tan, S., Shen, L., Chen, Z., Chen, F., & Fan, Q. (2026). Camellia shangshii (Theaceae), a new species endemic to danxia landscape from Guangdong Province, China. PhytoKeys, 270, 13–23. https://doi.org/10.3897/phytokeys.270.172597

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• Responses of soil labile organic carbon stocks and the carbon pool management index to different vegetation restoration types in the Danxia landform region of southwest China

  Vegetation restoration significantly enhances soil organic carbon (SOC) and its labile fractions, with bamboo forest (BF) and evergreen broad-leaved forest (EBF) showing the highest carbon sequestration potential in the Danxia landform region of southwest China. These vegetation types exhibited higher total SOC stocks (92.75 t ha⁻¹ for BF and 60.13 t ha⁻¹ for EBF) compared to other restoration types, along with elevated dissolved organic carbon (DOC), microbial biomass organic carbon (MBC), and easily oxidizable organic carbon (EOC). The study also found that the carbon pool management index (CPMI) increased by 49.7% in BF and 32.9% in EBF compared to shrub (SH), indicating superior carbon storage efficiency. SOC and its fractions were closely linked to soil physicochemical properties, with total nitrogen, phosphorus, and moisture playing a crucial role. These findings underscore the importance of selecting appropriate vegetation types for ecological restoration to maximize carbon sequestration and improve soil quality.

  Xiao, Y., Zhang, Y., Long, J., Luo, K., & Huang, Z. (2025). Responses of soil labile organic carbon stocks and the carbon pool management index to different vegetation restoration types in the Danxia landform region of southwest China. Plos One, 20(2), e0318195. https://doi.org/10.1371/journal.pone.0318195

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• Gap analysis of Firmiana danxiaensis, a rare tree species endemic to southern China

  A gap analysis reveals that over 78% of the potential habitat for Firmiana danxiaensis, a rare tree species endemic to southern China's Mount Danxia, lacks conservation protection. Using Biomod2 and Maxent models, researchers estimated its habitat at 6,255.28 km² and 4,114.19 km² respectively, with key climatic preferences including high temperature seasonality (6000–7000) and warmest-month maxima of 36–37°C. Alarming anthropogenic disturbances affect over 40% of its habitat, particularly in unprotected areas like Yingde and Shixing. The study urges adjustments to existing reserves and expansion of protected zones to safeguard this vulnerable species.

  LI, R., HU, X., LI, Q., LIU, L., HE, Y., & CHEN, C. (2024). Gap analysis of Firmiana danxiaensis, a rare tree species endemic to southern China. Ecological Indicators, 158, 111606. https://doi.org/10.1016/j.ecolind.2024.111606

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• Lysimachia danxiashanensis, a new species of Primulaceae from Guangdong, China

  A new species of Primulaceae, Lysimachia danxiashanensis, has been discovered in the unique Danxia landscape of Guangdong Province, China. This endemic plant is morphologically distinct from its closest relatives, characterized by purplish-red plants, wingless petioles, an orange glandular calyx, and a serrated corolla margin with orange-red glandular punctates. Phylogenetic analysis using ITS and rbcL sequences confirmed its status as a distinct clade within Lysimachia subgen. Lysimachia sect. Nummularia. The species is classified as Endangered (EN) under the IUCN Red List, highlighting the urgent need for conservation efforts in its native habitat.

  Zhang, X.-Y., Dai, J.-M., Fan, Q., Chen, Z.-X., Tang, G.-D., & Liao, W.-B. (2024). Lysimachia danxiashanensis, a new species of Primulaceae from Guangdong, China. PhytoKeys, 237, 257–268. https://doi.org/10.3897/phytokeys.237.114484

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• Camellia zijinica (Theaceae), a new species endemic to Danxia landscape from Guangdong Province, China

  Researchers have identified Camellia zijinica, a new species of the genus Camellia endemic to the Danxia landscape in Guangdong Province, China. This discovery was supported by both morphological and molecular analyses, including phylogenetic analysis based on chloroplast genomes. While closely related to species like C. drupifera, C. oleifera, and C. fluviatilis, Camellia zijinica exhibits distinct characteristics such as glabrous young branchlets, fewer bracteoles and sepals, diverse leaf shape, and a midvein that is slightly raised with sparse or no pubescence. These traits set it apart from its closest relative, C. microphylla, which typically features densely pubescent branchlets and leaves. The study highlights the biodiversity of the Danxia landscape and contributes to the understanding of the genus Camellia, particularly within the section Paracamellia.

  Lin, M., Ye, Q.-L., Zhang, Z.-J., Liao, W.-B., & Fan, Q. (2024). Camellia zijinica (Theaceae), a new species endemic to Danxia landscape from Guangdong Province, China. PhytoKeys, 237, 245–255. https://doi.org/10.3897/phytokeys.237.114768

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• Oxalis xishuiensis (Oxalidaceae), a new species from Danxia landforms in Guizhou, China

  Researchers have identified Oxalis xishuiensis, a new species of Oxalidaceae, from the Danxia landforms in Xishui County, Guizhou, China. This discovery is notable for its distinct morphological traits compared to its closest relative, O. wulingensis, including nearly square-shaped lateral leaflets, shorter peduncles, elongated capsules (1.2–1.5 cm), and alveolate seeds. The study highlights the botanical diversity of Danxia landforms, which are renowned for their colorful rock formations and unique ecosystems. The identification was based on detailed morphological comparisons, emphasizing the importance of field surveys in uncovering new species within protected natural sites like UNESCO World Heritage areas.

  Yang, Y.-B., Li, H., An, M.-T., Huang, L., Hu, G.-X., Yang, C.-H., & Dai, Z.-X. (2024). Oxalis xishuiensis (Oxalidaceae), a new species from Danxia landforms in Guizhou, China. PhytoKeys, 239, 267–273. https://doi.org/10.3897/phytokeys.239.119046

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• Landform and lithospheric development contribute to the assembly of mountain floras in China

  Mountain floras in China exhibit distinct assembly patterns influenced by geological processes. Research reveals that igneous bedrock, such as granitic and karst-granitic landforms, fosters higher species richness and phylogenetic overdispersion, while sedimentary bedrock, including karst, Danxia, and desert landforms, promotes phylogenetic clustering. The study, based on a dataset of 17,576 angiosperm species across 140 Chinese mountain floras, demonstrates that landform type is the primary determinant for older species, whereas climate plays a greater role in younger species. This finding challenges traditional views and introduces the 'floristic geo-lithology hypothesis,' which emphasizes the critical role of bedrock and landform processes in shaping montane biodiversity. The research provides new insights into speciation, migration, and biodiversity dynamics in mountainous regions.

  Zhao, W.-Y., Liu, Z.-C., Shi, S., Li, J.-L., Xu, K.-W., Huang, K.-Y., Chen, Z.-H., Wang, Y.-R., Huang, C.-Y., Wang, Y., Chen, J.-R., Sun, X.-L., Liang, W.-X., Guo, W., Wang, L.-Y., Meng, K.-K., Li, X.-J., Yin, Q.-Y., Zhou, R.-C., et al. (2024). Landform and lithospheric development contribute to the assembly of mountain floras in China. Nature Communications, 15(1). https://doi.org/10.1038/s41467-024-49522-4

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