江西九岭山国家自然保护区苔藓植物区系研究北大核心CSCD

九岭山国家级自然保护区南连罗霄山脉,东、北、西三面与武夷山脉、大别山脉、武陵山脉隔水相望。笔者于2020年9至12月间,对九岭山国家级自然保护区苔藓植物进行了野外调查及标本采集,共采集标本562号,对保护区苔藓植物标本进行鉴定及统计,分析研究区苔藓植物区系地理特征,并与江西7个地区苔藓植物的相似性和热带性质/温带性质(R/T)值进行了比较。结果表明:(1)九岭山国家级自然保护区共有苔藓植物58科100属179种(变种、亚种和变型),其中藓类植物34科64属113种,苔类植物23科34属64种,角苔类植物1科2属2种。(2)九岭山苔藓植物区系成分复杂,区系成分以东亚分布最高;温带成分略高于热带成分,该区表现出明显的过渡性。(3)九岭山苔藓植物与大部分地区科、属的相似性都较高;九岭山与阳际峰种的相似性最高,而与鄱阳湖湿地种的相似性最低。(4)九连山自然保护区苔藓植物R/T值最高为1.32,鄱阳湖湿地R/T值最低为0.50;九岭山国家级自然保护区与铜钹山自然保护区的R/T值最接近,且都是温带性质略高于热带性质,具有明显过渡性。总体来看,江西从南到北热带成分逐步减少,温带成分不断增加,中部呈现出明显的过渡性。

Study on the Flora of Bryophyte in Jiulingshan National Nature Reserve, Jiangxi Province, China

The Jiulingshan National Nature Reserve extends south to the Luoxiao Mountains, and faces the Wuyi Mountains, Dabie Mountains and Wuling Mountains across the river on east, north and west sides, respectively. From September to December of 2020, the authors conducted several field surveys and specimen collections for bryophytes in Jiulingshan National Nature Reserve. A total of 562 specimens were collected. The specimens of bryophytes from the Jiulingshan National Nature Reserve were identified and counted. Based on the similarity coefficient and the ratio of the tropic elements to the temperate elements (R/T values), the floristic geographical characteristics was analyzed and compared with seven regions in Jiangxi. The results are as follows: (1) there are 58 families, 100 genera and 179 species of bryophytes in Jiulingshan National Nature Reserve, including 34 families, 64 genera and 113 species of mosses; 23 families, 34 genera and 64 species of liverworts; and 1 family, 2 genera and 2 species of hornworts. (2) The composition of the bryoflora in Jiulingshan is complex. The highest element is East Asia, the temperate elements are slightly higher than the tropical elements, and the area shows obvious convergence and transition in floristics characteristics. (3) The similarities between Jiulingshan and most of the seven areas are high on families and genera; Jiulingshan has the highest floristics characteristics. Jiulingshan has the highest similarity with Yangjifeng on species, and Jiulingshan has the lowest similarity with Poyang Lake Wetland on species. (4) The highest R/T value is 1.32 for Jiulianshan Nature Reserve, and the lowest R/T value is 0.50 for Poyang Lake Wetland. The R/T values of Jiulingshan National Nature Reserve and Tongboshan Nature Reserve are the closest, and in both, temperate elements are slightly higher than tropical elements showing obvious floristic transition. In conclusion, the tropical elements of bryoflora are decreasing from south to north in Jiangxi. Meanwhile, the temperate elements are increasing, and the bryoflora of the central part of Jiangxi shows obvious convergence and transition.