形态上的高变物种阻碍了我们对生物多样性的了解:以旋花科Daustinia montana为例

IF 2.3 2区 生物学 Q2 PLANT SCIENCES
J. Alencar, Jefferson Rodrigues Maciel, Maria Teresa Buril
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引用次数: 0

摘要

随着时间的推移,神秘物种继续吸引着分类学家,并阻碍了生物多样性的知识。一个被认为是神秘物种的例子是山地Daustinia montana(旋花科)。它的宽叶形态可塑性导致了多种解释和对比分类:从单型到六分类群假说。在这项工作中,我们使用单变量和多变量方法,在稳健的统计分析下,测试了六个分类学假设,包括单型方法的显式测试。除此之外,我们还进行了生态位分析,以验证此处识别为可能物种的种群的生态位占用情况。对16个山地D.montana种群个体的48个微观和宏观形态特征(定性和定量)进行了评价。识别八个不同物种的分类学假说得到了最高的支持,因为它们也有不重叠的生态位。我们得出的结论是,Daustinia的物种数量可能比目前的范围更大。我们还强调了在生物多样性研究中采用综合系统方法的重要性。这项研究代表了该属具体划界的第一步,也可以作为研究具有广泛形态变异性的分类群的模型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Morphologically hypervariable species hinder our knowledge of biodiversity: Daustinia montana (Convolvulaceae) as a case study
Cryptic species continue to intrigue taxonomists over time and hamper biodiversity knowledge. An example of what would be considered a cryptic species is Daustinia montana (Convolvulaceae). Its wide leaf morphology plasticity has led to multiple interpretations and contrasting classifications: from a monotypic to a six-taxa hypothesis. For this work, we tested six taxonomic hypotheses, including an explicit test of a monotypic approach, under a robust statistical analysis, using univariate and multivariate methods. Besides that, we performed a niche analysis to verify the niche occupation of the populations recognized here as possible species. Forty-eight micro and macromorphological characters (qualitative and quantitative) from individuals of 16 populations of D. montana were evaluated. The taxonomic hypothesis that recognizes eight distinct species has the highest support as they also have non-overlapping niches. We conclude that the number of species in Daustinia may be greater than its current circumscription. We also highlight the importance of an integrative systematic approach in the study of biodiversity. This research represents a first step in the specific delimitations of the genus and can also serve as a model to study taxa with wide morphological variability.
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来源期刊
CiteScore
5.70
自引率
8.30%
发文量
54
审稿时长
3.5 months
期刊介绍: The Botanical Journal of the Linnean Society publishes original papers on systematic and evolutionary botany and comparative studies of both living and fossil plants. Review papers are also welcomed which integrate fields such as cytology, morphogenesis, palynology and phytochemistry into a taxonomic framework. The Journal will only publish new taxa in exceptional circumstances or as part of larger monographic or phylogenetic revisions.
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