Cryptic Diversity of Mediterranean Neogoniolithon (Corallinales, Corallinophycidae, Rhodophyta)

IF 2.5 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Dino Angelo E. Ramos, Jesús Del Río, Julio Peñas, Viviana Peña, Juan C. Braga
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Abstract

Neogoniolithon is a widespread genus of non-geniculate coralline algae in the Mediterranean Sea. Three vaguely differentiated species have been reported in the region. This study examined the diversity of Neogoniolithon in the Mediterranean by inferring phylogenies using psbA and COI-5P markers, applying delimitation algorithms and comparing morpho-anatomies of putative species. In contrast to previous reports, 13 species were delimited from the Mediterranean in two distant clades. Initial observations suggested that tetrasporangial conceptacle size might be used to separate the two clades. Only three species showed fruticose morphologies. Further morpho-anatomical differentiation was difficult. One species included Mediterranean, Pacific and Atlantic samples, while three other species occurred in the Mediterranean and the Canary Islands. The global tree revealed that most species were geographically restricted. Crypticity in multiple lineages implied a much higher diversity than currently reported, even lacking samples from the eastern Mediterranean. Only sequence data can be used to identify these cryptic lineages. High endemism emphasizes the importance of conservation of coralline algal bioconstructions to prevent extinctions. The presence of cryptic diversity also invites a reassessment of the knowledge on species distributions that are important in conservation planning and management.

Abstract Image

地中海新藻的隐秘多样性(珊瑚纲,珊瑚叶科,红藻属)
Neogoniolithon 是地中海广泛分布的非基因型珊瑚藻属。据报道,该地区有三个区分不清的物种。本研究通过使用 psbA 和 COI-5P 标记推断系统发育、应用划界算法和比较推定物种的形态解剖,考察了地中海 Neogoniolithon 的多样性。与之前的报告不同,地中海的 13 个物种被划分为两个相距甚远的支系。初步观察结果表明,四孢子囊的大小可以用来区分两个支系。只有 3 个物种表现出纤毛形态。进一步的形态解剖学区分十分困难。一个物种包括地中海、太平洋和大西洋样本,而另外三个物种则出现在地中海和加那利群岛。全球树显示,大多数物种受到地理限制。多个品系的隐蔽性意味着其多样性比目前报道的要高得多,甚至缺乏地中海东部的样本。只有序列数据才能用于识别这些隐蔽的世系。高度地方性强调了保护珊瑚藻生物构造以防止其灭绝的重要性。隐性多样性的存在也要求对物种分布知识进行重新评估,这对保护规划和管理非常重要。
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来源期刊
Aquatic Conservation-Marine and Freshwater Ecosystems
Aquatic Conservation-Marine and Freshwater Ecosystems 环境科学-海洋与淡水生物学
CiteScore
5.50
自引率
4.20%
发文量
143
审稿时长
18-36 weeks
期刊介绍: Aquatic Conservation: Marine and Freshwater Ecosystems is an international journal dedicated to publishing original papers that relate specifically to freshwater, brackish or marine habitats and encouraging work that spans these ecosystems. This journal provides a forum in which all aspects of the conservation of aquatic biological resources can be presented and discussed, enabling greater cooperation and efficiency in solving problems in aquatic resource conservation.
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