Subjects: Biology >> Botany >> Applied botany submitted time 2024-05-15 Cooperative journals: 《广西植物》
Li Jinghan
Zhang Shunwei
Yang Xiaobo
Li Donghai
Qi Chunlin
Huang Yao
Zhang Xiang
Hao Jiewei
Liang Caiqun
Zhu Zicheng
Jiang Yuexin
Wang Chongyang
HE Yiqi
Abstract： Based on the ‘National Key Protected Wild Plants List’ and related data in 2021, combined with field investigation, the ‘National Key Protected Wild Plants List of Hainan Province’ was integrated, and its composition and floristic characteristics were analyzed. The results were as follows: (1) Among the national key protected wild plants, the original Cycas changjiangensis, C. hainanensis, C. lingshuigensis and C. taiwaniana were incorporated into C. taiwaniana; compared with the National Key Protected Wild Plant List in 1999, the original Semiliquidambar cathayensis and Amphicarpaea linearis were removed from the protection category, and Bretschneidera sinensis was degraded from the Category I protection to the Category II protection.127 species of national key protected wild plants were added, and a total of 173 species ( including varieties ) were added, belonging to 53 families and 83 genera, including 8 species of national Category I protected wild plants. There are 165 species of national Category II protected wild plants and 32 endemic species in Hainan Province, which belong to 4 groups. Among them, the angiosperm species are the most abundant, with 129 species. (2) Based on years of field investigation information and the results of this survey, Cycas rumphii, C. shanyagensis, Alsophila costularis and Paphiopedilum purpuratum have not been investigated. (3) The life forms of 173 protected plants were divided into 5 types, mainly phanerophytes ( 115 species ), followed by hemicryptophytes ( 34 species ) and hemicryptophytes ( 22 species ), and hemicryptophytes and cushion plants were the least ( 1 species ). (4) At the family level, Orchidaceae had the most species, including 47 species ( 27.17% ). At the genus level, Dendrobium has the largest number of species, including 21 species ( 12.14% ). (5) The floristic elements are complex and have obvious tropical characteristics. The families are mainly distributed in the pantropics and their variants. The genera are mainly distributed in tropical Asia and its variants. In summary, the tropical nature and unique phenomena of national key protected wild plants in Hainan Province are obvious, and there are many new protected species. Therefore, background investigation and dynamic monitoring should be carried out continuously, law enforcement should be strengthened, human factors should be reduced to interfere with and destroy habitats, and in-situ and ex-situ protection measures should be taken to strengthen protection and management.
Subjects: Biology >> Botany >> Applied botany submitted time 2024-05-07 Cooperative journals: 《广西植物》
ZHANG Shunwei
LI Jinghan
YANG Xiaobo
LI Donghai
WANG Chongyang
ZHU Zicheng
JIANG Yuexin
HE Yiqi
Shang Naiyan
DU Chunyan
LIU Chang
ZHONG Iishuang
SU Xin
Abstract： In order to reveal the distribution and habitat characteristics of national key protected wild plants in Hainan Province, this paper selected national key protected wild plants, based on the 2021 edition of the List of national key protected wild plants th rough field surveys, researched the distribution of national key protected wild plants in Hainan Province and their type of vegetation. The results were as follows : (1) T here were a total of 53 families, 83 genera and 173 species of national key protected wild plants in Hainan Province, ranking fifth in the number of species and first in the density of species in China (based on the current data base of wild). (2) A ll 19 counties and municipalities in Hainan Province had national key protected wild plants, and the number of species in the central and the south of the cities/counties is much larger than that in the north, with the largest species richness in Changjiang Li Autonomous County (75 species), and the highest species density in Lingshui Li Autonomou s County (0.60 4 5 ind.•km 2 ); T he number of species of national key protected wild plants was distributed in nine gradients (with a gradient value of 200 m) from 0 to 1 867 m above sea level, and there were a trend of slightly decreased very rapidly increa sed slowly decreased, with the highest number of species distributed in the elevation band. When 800 m Altitude < 1 000 m and 1 000 m Altitude < 1 200 m, there was 81 national key protected wild plant species, while only 9 species in the segment 1 600 m Altitude < 1 867 m (3) The habitats of national key protected wild plants in Hainan Province were complex ed , rel ied on a total of 11 vegetation types, among which the lowland rainforest ha d the highest species richness (114 species), followed by mountain rainforest (105 species) and the semi mangrove forest (1 species); and the most severely externally disturbed is freshwater wet grassland, followed by lowland rainforest, and the least is m ontane cloud forest. The results of the study can provide scientific reference for the conservation and utilization of national key protected wild p lants in Hainan Province.
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