Recircumscription of Huperzia serrata complex in China using morphological and climatic data
Recircumscription of Huperzia serrata complex in China using morphological and climatic data
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利用形态和气候数据重新划分中国锯齿石杉复合体
DOI：
10.1111/jse.12120
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发表时间：
2015-01-01
影响因子：
3.7
通讯作者：
Zhang, Xian-Chun
中科院分区：
文献类型：
--
作者：
Shrestha, Nawal;Zhang, Xian-Chun
锯齿石杉（拇指）特列维。中国的复合体包括分类学上混淆的分类群，边界不清。该类群中已确认的分类群数量一直存在争议，因此，该类群经历了几次分类变化。中国锯齿蛇属复合体的种界存在不足和未解决的问题，需要进行全面系统的研究。为了解决这些问题，我们尝试用综合的多元方法推断中国serrata复合体的推定分类群之间的诊断差异，并划定其种界。形态学特征进行多变量检验（主成分分析、判别分析、χ2检验、聚类分析），然后进行单变量方差分析和Tukey事后检验。利用MaxEnt模型建立物种分布模型，并进行生态位等效性和相似性检验。形态学分析清楚地将标本划分为4个不同的聚类，分别代表H. crispata (Ching) Ching、H. nanlingensis Y. H. Yan和N. Shrestha，以及2个由地理隔离区域的标本组成的serrata聚类。对这四个不同分类群的认识也得到了气候资料的支持。基于形态学、气候数据和生态位模型的分析，我们将crispata、nanlingensis、中国北方的serrata和中国南方的serrata划分为4个不同的物种。结果表明，中国北方的锯齿刺人属为真锯齿刺人属，而中国南方的分类群为爪哇刺人属。然而，我们的结果并不支持以前在serrata下识别的其他种下分类群。
The Huperzia serrata (Thunb.) Trevis. complex in China includes taxonomically confusing taxa with unclear boundaries. The number of recognized taxa in this group has long been debated and with this, the group has undergone several taxonomic changes. The species circumscription of H. serrata complex in China is inadequate and unresolved and is in need of comprehensive systematic studies. To address these issues, we have attempted to infer diagnostic differences between the putative taxa and circumscribe species boundary of H. serrata complex in China using an integrative multivariate approach. Morphological characters were subjected to multivariate tests (principal component analysis, discriminant analysis, χ2‐test, cluster analysis) followed by univariate analysis of variance and Tukey's post‐hoc test. MaxEnt modeling was used to create distribution models of the species followed by niche equivalency and similarity tests. The morphometric analysis clearly separated the specimens into four distinct clusters representing H. crispata (Ching) Ching, H. nanlingensis Y. H. Yan & N. Shrestha, and two clusters of H. serrata comprising specimens from geographically isolated regions. The recognition of these four distinct taxa was supported by climatic data as well. Based on our analysis of morphological with climatic data and ecological niche modeling we recognized H. crispata, H. nanlingensis, the northern Chinese H. serrata, and the southern Chinese H. serrata as four different species. We identified the northern Chinese H. serrata as true H. serrata and the southern Chinese taxa as H. javanica. Our results, however, did not support the recognition of other infraspecific taxa previously recognized under H. serrata.