Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda)
The Yucatán Peninsula is a karstic region, rich in subterranean environments with a diverse crustacean stygobiont fauna. In order to gain insights into the biological evolution of the subterranean environments of this region, we evaluated the ostracode species composition of caves and cenotes in fiv...
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MDPI AG
2021-01-01
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| Online Access: | https://www.mdpi.com/1424-2818/13/2/44 |
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| author | Laura Macario-González Sergio Cohuo Dorottya Angyal Liseth Pérez Maite Mascaró |
| author_facet | Laura Macario-González Sergio Cohuo Dorottya Angyal Liseth Pérez Maite Mascaró |
| author_sort | Laura Macario-González |
| collection | DOAJ |
| description | The Yucatán Peninsula is a karstic region, rich in subterranean environments with a diverse crustacean stygobiont fauna. In order to gain insights into the biological evolution of the subterranean environments of this region, we evaluated the ostracode species composition of caves and cenotes in five independent sampling campaigns (2008, 2013, 2017–2019). Using morphometric analyses, we evaluated inter-population morphological variability; using molecular analysis based on mitochondrial COI and nuclear 18S rDNA, we evaluated genetic differentiation in selected species. The observed fauna is composed of 20 (epigean) species, presenting a lack of strict stygobionts. Morphometric analyses discriminated up to three morphotypes in each of the three most abundant species: <i>Cytheridella ilosvayi</i>, <i>Alicenula</i> sp. and <i>Cypridopsis vidua</i>. High intraspecific morphological variability was found either in shape or size. Phylogenetic analysis based on COI demonstrated the existence of three lineages on <i>C. ilosvayi</i>, with high support (>0.9). The 18S rDNA sequences were identical among individuals of different populations. A lack of congruence between the genetic markers precluded us from postulating speciation in subterranean environments. It is likely that Late Pleistocene—Early Holocene climate variation related to sea level and precipitation was forcing agent for epigean ostracode dominance in subterranean environments of the Peninsula. |
| first_indexed | 2024-03-09T03:48:31Z |
| format | Article |
| id | doaj.art-7feef59165d046a4b33a41a016eb0864 |
| institution | Directory Open Access Journal |
| issn | 1424-2818 |
| language | English |
| last_indexed | 2024-03-09T03:48:31Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diversity |
| spelling | doaj.art-7feef59165d046a4b33a41a016eb08642023-12-03T14:30:51ZengMDPI AGDiversity1424-28182021-01-011324410.3390/d13020044Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda)Laura Macario-González0Sergio Cohuo1Dorottya Angyal2Liseth Pérez3Maite Mascaró4Tecnológico Nacional de México—I. T. de la Zona Maya, Carretera Chetumal-Escárcega Km 21.5, Ejido Juan Sarabia, Quintana Roo 77965, MexicoTecnológico Nacional de México—I. T. Chetumal., Av. Insurgentes 330, Chetumal, Quintana Roo 77013, MexicoUnidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Puerto de Abrigo s/n, Sisal, Yucatán 97356, MexicoInstitut für Geosysteme und Bioindikation, Technische Universität Braunschweig, Langer Kamp 19c, 38106 Braunschweig, GermanyUnidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Puerto de Abrigo s/n, Sisal, Yucatán 97356, MexicoThe Yucatán Peninsula is a karstic region, rich in subterranean environments with a diverse crustacean stygobiont fauna. In order to gain insights into the biological evolution of the subterranean environments of this region, we evaluated the ostracode species composition of caves and cenotes in five independent sampling campaigns (2008, 2013, 2017–2019). Using morphometric analyses, we evaluated inter-population morphological variability; using molecular analysis based on mitochondrial COI and nuclear 18S rDNA, we evaluated genetic differentiation in selected species. The observed fauna is composed of 20 (epigean) species, presenting a lack of strict stygobionts. Morphometric analyses discriminated up to three morphotypes in each of the three most abundant species: <i>Cytheridella ilosvayi</i>, <i>Alicenula</i> sp. and <i>Cypridopsis vidua</i>. High intraspecific morphological variability was found either in shape or size. Phylogenetic analysis based on COI demonstrated the existence of three lineages on <i>C. ilosvayi</i>, with high support (>0.9). The 18S rDNA sequences were identical among individuals of different populations. A lack of congruence between the genetic markers precluded us from postulating speciation in subterranean environments. It is likely that Late Pleistocene—Early Holocene climate variation related to sea level and precipitation was forcing agent for epigean ostracode dominance in subterranean environments of the Peninsula.https://www.mdpi.com/1424-2818/13/2/44OstracodaYucatán Peninsulacenotesmitochondrial markergeometric morphometrics |
| spellingShingle | Laura Macario-González Sergio Cohuo Dorottya Angyal Liseth Pérez Maite Mascaró Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda) Diversity Ostracoda Yucatán Peninsula cenotes mitochondrial marker geometric morphometrics |
| title | Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda) |
| title_full | Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda) |
| title_fullStr | Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda) |
| title_full_unstemmed | Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda) |
| title_short | Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda) |
| title_sort | subterranean waters of yucatan peninsula mexico reveal epigean species dominance and intraspecific variability in freshwater ostracodes crustacea ostracoda |
| topic | Ostracoda Yucatán Peninsula cenotes mitochondrial marker geometric morphometrics |
| url | https://www.mdpi.com/1424-2818/13/2/44 |
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