理解生物多样性的空间变异和形成机制是生态学研究的热点。与α多样性相比,β多样性更准确地反映了群落动态。在过去的几十年里,β多样性研究通常集中在植物上,哺乳动物,和鸟。山地生态系统两栖动物β多样性的研究,特别是,tadpoles,仍然罕见。在这项研究中,峨眉山,位于中国西南部,被选为研究区域。我们探索了18个溪流中的tβ多样性,基于一项为期两年的调查(2018-2019年)。我们的结果表明,t组合中的总β多样性很高,这是由周转和嵌套过程决定的,占主导地位的是营业额。总β多样性和周转成分均与地理显著正相关,海拔,和环境距离,但是在这些与嵌套成分之间没有检测到显着的关系。此外,河流宽度的独立贡献,当前速度,叶绿素α大于地理和海拔距离。总的来说,tβ多样性由空间和环境因素决定,而环境因素的贡献较大。未来的研究可以集中在功能和系统发育结构上,为了更好地了解t的组装过程。
Understanding the spatial variation and formation mechanism of biological diversity is a hot topic in ecological studies. Comparing with α diversity, β diversity is more accurate in reflecting community dynamics. During the past decades, β diversity studies usually focused on plants, mammals, and birds. Studies of
amphibian β diversity in montane ecosystems, in particular, tadpoles, are still rare. In this study, Mount Emei, located in southwestern
China, was selected as the study area. We explored the tadpole β diversity in 18 streams, based on a two-year survey (2018-2019). Our results indicated a high total β diversity in tadpole assemblages, which was determined by both turnover and nestedness processes, and the dominant component was turnover. Both the total β diversity and turnover component were significantly and positively correlated with geographical, elevational, and environmental distances, but no significant relationship was detected between these and the nestedness component. Moreover, the independent contributions of river width, current velocity, and chlorophyll α were larger than that of geographical and elevational distance. Overall, tadpole β diversity was determined by both spatial and environmental factors, while the contribution of environmental factors was larger. Future studies can focus on functional and phylogenetic structures, to better understand the tadpole assembly process.