Tuyen Thi Tran, Kazuya Takahashi, Hiroaki Nishikawa, Reiko Tanabe, Trang Thanh Thi Nguyen, Viet Ha Thi Nguyen, Thanh Mai Thi Nguyen, Hien Van Bui
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Thus, this study investigated the habitats of C. quephongensis in terms of landscape and stand composition, analyzed the morphological variabilities and age distribution patterns among different habitat types, and explored its adaptation mechanisms. The results revealed that this species preferentially inhabited forests on vulnerable slopes and stream banks, which were frequently disturbed by slope failure or flooding, while its multi-stemming traits were key factors in recovering from damage and persisting in such habitats. Relatively stable sites with fewer disturbances can be a source habitat, whereas frequently disturbed sites can be a sink habitat for the populations. Regular thinning of the shrub and herb layers in the plantation maintained a stand composition similar to that of natural stands; thus, succession control is recommended to conserve the naturally growing site of this species. 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引用次数: 0
摘要
茶花(Camellia quephongensis Hakoda et Ninh)是一种黄花茶花,生长在越南中北部的义安省的鹊峰地区,其分类群包括来自中国南部和越南的约50种。研究人员主要集中在茶花药用物质的分类和生物化学以及其繁殖的园艺研究上。因此,生境特征和适应机制仍然需要更好地了解。因此,本研究从景观和林分组成等方面对魁丰种的生境进行了调查,分析了不同生境类型间的形态变异和年龄分布规律,并探讨了其适应机制。结果表明,该物种优先栖息于易受边坡破坏或洪水干扰的脆弱山坡和河岸上,其多干性特征是其在这些生境中恢复和生存的关键因素。干扰较少的相对稳定的地点可以成为种群的源栖地,而频繁受到干扰的地点可以成为种群的汇栖地。人工林灌木和草本层的定期间伐保持了与自然林分相似的林分组成;因此,建议采取演替控制措施来保护该树种的自然生长地。这项研究的结果将有助于未来的保护和恢复种植区。
Habitat Characteristics of Camellia quephongensis and Adaptation Mechanisms in Que Phong District, North-Central Vietnam
Camellia quephongensis Hakoda et Ninh is a yellow-flowered camellia that inhabits the Que Phong District, Nghe An Province, North-Central Vietnam, and its taxon includes approximately 50 species from South China and Vietnam. Researchers have primarily focused on the taxonomy and biochemistry of medicinal substances found in camellia flowers and on horticultural studies of their propagation. Consequently, habitat characteristics and adaptation mechanisms still need to be better understood. Thus, this study investigated the habitats of C. quephongensis in terms of landscape and stand composition, analyzed the morphological variabilities and age distribution patterns among different habitat types, and explored its adaptation mechanisms. The results revealed that this species preferentially inhabited forests on vulnerable slopes and stream banks, which were frequently disturbed by slope failure or flooding, while its multi-stemming traits were key factors in recovering from damage and persisting in such habitats. Relatively stable sites with fewer disturbances can be a source habitat, whereas frequently disturbed sites can be a sink habitat for the populations. Regular thinning of the shrub and herb layers in the plantation maintained a stand composition similar to that of natural stands; thus, succession control is recommended to conserve the naturally growing site of this species. The findings of this study will aid in the future conservation and restoration of growing areas.
期刊介绍:
The International Journal of Plant Biology is an Open Access, online-only, peer-reviewed journal that considers scientific papers in all different subdisciplines of plant biology, such as physiology, molecular biology, cell biology, development, genetics, systematics, ecology, evolution, ecophysiology, plant-microbe interactions, mycology and phytopathology.