Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environmental of Guizhou Province, Guizhou Normal University, Guiyang, China.
School of Life sciences, Guizhou Normal University, Guiyang, China.
Plant Biol (Stuttg). 2020 Sep;22(5):822-831. doi: 10.1111/plb.13129. Epub 2020 Jul 4.
A sinkhole ecosystem, as a refuge for plant diversity, has been subjected to intensive exploitation, leading to ecosystem destruction of sinkholes in China. Understanding the responses of bryophyte distribution to destruction of the sinkhole environment are crucial to implementing protection measures for bryophyte diversity. Haolong sinkhole in Guangxi Zhuang Autonomous Region of China, the third largest sinkhole in the world, was selected as the study area. The Wilson Shmida index was used to analyse bryophyte species diversity; a Generalized Linear Model (GLM) was used to reveal species vertical distribution of bryophytes, the Single and Multiple Species Distribution Models (SSDM, MSDM) were used for analysis of the relationship between bryophyte species distribution, environmental factors and heavy metals. A total of 183 species from 74 genera in 36 families of bryophytes were collected from Haolong sinkhole, of which 26 species are endemic to China. Bryophyte species diversity was ranked in the order: agricultural section < forest section < grassland. In the vertical direction, bryophyte distribution was divided into point, disjunctive and continuous distributions using the GLM. The SSMA and MSDM indicated that bryophyte species of each of these three distributions can be divided into a temperature-slope zone, light-depth-pH-humidity zone, Pb (B)-Hg (B) zone and mixed heavy metals zone according to the effect of environmental factors and heavy metals such as As. Environmental factors or heavy metals, such as As, in Haolong sinkhole effectively cooperate in bryophyte distribution. An effective way to protect bryophyte diversity, in particular species endemic to China in the sinkhole environment, is through education and involvement of the local villagers to minimize further damage to the sinkhole environment.
喀斯特天坑生态系统是植物多样性的避难所，但其正遭受高强度的开发，导致中国天坑生态系统遭到破坏。了解藓类植物分布对天坑环境破坏的响应，对于实施藓类植物多样性保护措施至关重要。本研究选取世界第三大天坑——广西壮族自治区浩坤天坑作为研究区。利用 Wilson Shmida 指数分析藓类植物物种多样性；采用广义线性模型（GLM）揭示藓类植物的物种垂直分布；利用单种和多种分布模型（SSDM、MSDM）分析藓类植物物种分布与环境因子和重金属之间的关系。共采集到来自 36 科 74 属的 183 种藓类植物，其中 26 种为中国特有种。浩坤天坑的藓类植物物种多样性顺序为：农业区<森林区<草地。在垂直方向上，GLM 将藓类植物分布分为点状分布、不连续分布和连续分布。SSMA 和 MSDM 表明，这三种分布的藓类植物物种可以根据环境因子和重金属如 As 的影响，分为温度坡度带、光照深度 pH 湿度带、Pb（B）-Hg（B）带和混合重金属带。天坑中的环境因素或重金属，如 As，有效合作影响藓类植物的分布。保护天坑环境中藓类植物多样性，特别是保护中国特有种的有效方法是通过教育和当地村民的参与，尽量减少对天坑环境的进一步破坏。
