Vieira Christophe, Morrow Kathleen, D'Hondt Sofie, Camacho Olga, Engelen Aschwin H, Payri Claude E, De Clerck Olivier
Phycology Research Group and Center for Molecular Phylogenetics and Evolution, Ghent University, Krijgslaan 281 (S8), Ghent, B-9000, Belgium.
Kobe University Research Center for Inland Seas, Rokkodai, Kobe, 657-8501, Japan.
J Phycol. 2020 Jun;56(3):592-607. doi: 10.1111/jpy.12986. Epub 2020 May 4.
Distributed in tropical and warm-temperate waters worldwide, Lobophora species are found across the Greater Caribbean (i.e., Caribbean sensu stricto, Gulf of Mexico, Florida, the Bahamas, and Bermuda). We presently discuss the diversity, ecology, biogeography, and evolution of the Greater Caribbean Lobophora species based on previous studies and an extensive number of samples collected across the eastern, southern, and to a lesser extent western Caribbean. A total of 18 Lobophora species are now documented from the Greater Caribbean, of which five are newly described (L. agardhii sp. nov., L. dickiei sp. nov., L. lamourouxii sp. nov., L. richardii sp. nov., and L. setchellii sp. nov.). Within the Greater Caribbean, the eastern Caribbean and the Central Province are the most diverse ecoregion and province (16 spp.), respectively. Observed distribution patterns indicate that Lobophora species from the Greater Caribbean have climate affinities (i.e., warm-temperate vs. tropical affinities). In total, 11 Lobophora species exclusively occur in the Greater Caribbean; six are present in the western Atlantic; two in the Indo-Pacific; and one in the eastern Pacific. Biogeographic analyses support that no speciation occurred across the Isthmus of Panama, and that the Greater Caribbean acted as a recipient region for species from the Indo-Pacific and as a region of diversification as well as a donor region to the North-eastern Atlantic. The Greater Caribbean is not an evolutionary dead end for Lobophora, but instead generates and exports diversity. Present results illustrate how sampling based on DNA identification is reshaping biogeographic patterns, as we know them.
叶状藻属物种分布于全球热带和暖温带水域，在大加勒比地区（即狭义的加勒比地区、墨西哥湾、佛罗里达、巴哈马群岛和百慕大群岛）均有发现。我们目前基于先前的研究以及在加勒比海东部、南部以及较少程度的西部收集的大量样本，来探讨大加勒比地区叶状藻属物种的多样性、生态学、生物地理学和进化情况。目前已记录到大加勒比地区共有18种叶状藻属物种，其中有5种是新描述的（新种阿加德叶状藻、新种迪基叶状藻、新种拉穆鲁叶状藻、新种理查兹叶状藻和新种塞切尔叶状藻）。在大加勒比地区内，加勒比海东部和中部省份分别是物种最为多样的生态区域和省份（各有16种）。观察到的分布模式表明，大加勒比地区的叶状藻属物种具有气候亲和性（即暖温带亲和性与热带亲和性）。总共有11种叶状藻属物种仅出现在大加勒比地区；6种出现在西大西洋；2种出现在印度 - 太平洋地区；1种出现在东太平洋。生物地理学分析支持这样的观点，即巴拿马地峡并未发生物种形成，并且大加勒比地区既是印度 - 太平洋地区物种的接收区域，也是一个多样化区域以及向东北大西洋输出物种的区域。大加勒比地区对于叶状藻属来说并非进化的死胡同，相反，它产生并输出多样性。目前的结果说明了基于DNA鉴定的采样如何正在重塑我们所熟知的生物地理模式。
