Phylogeography of Mesophotic Coral Ecosystems: Squirrelfish and Soldierfish (Holocentriformes: Holocentridae)
Mesophotic coral ecosystems (MCEs: ~30 to 100+ m depth) may be older and more stable than shallow coral ecosystems that are more prone to disturbances in both the long term (glacial sea level cycles) and short term (heavy weather and anthropogenic activities). Here, we assess the phylogeography of t...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| author | Joshua M. Copus Cameron A. J. Walsh Mykle L. Hoban Anne M. Lee Richard L. Pyle Randall K. Kosaki Robert J. Toonen Brian W. Bowen |
| author_facet | Joshua M. Copus Cameron A. J. Walsh Mykle L. Hoban Anne M. Lee Richard L. Pyle Randall K. Kosaki Robert J. Toonen Brian W. Bowen |
| author_sort | Joshua M. Copus |
| collection | DOAJ |
| description | Mesophotic coral ecosystems (MCEs: ~30 to 100+ m depth) may be older and more stable than shallow coral ecosystems that are more prone to disturbances in both the long term (glacial sea level cycles) and short term (heavy weather and anthropogenic activities). Here, we assess the phylogeography of two MCE fishes, the soldierfish <i>Myripristis chryseres</i> (N = 85) and the squirrelfish <i>Neoniphon aurolineatus</i> (N = 74), with mtDNA cytochrome oxidase C subunit I. Our goal is to resolve population genetic diversity across the Central and West Pacific and compare these patterns to three shallow-reef species in the same taxonomic family (Holocentridae). Significant population structure (Φ<sub>ST</sub> = 0.148, <i>p</i> = 0.01) was observed in <i>N. aurolineatus</i>, while no structure was detected in <i>M. chryseres</i> (Φ<sub>ST</sub> = −0.031, <i>p</i> = 0.83), a finding that matches the shallow-water congener <i>M. berndti</i> (Φ<sub>ST</sub> = −0.007, <i>p</i> = 0.63) across the same range. Nucleotide diversity in the MCE fishes was low (π = 0.0024–0.0028) compared to shallow counterparts (π = 0.003–0.006). Coalescence times calculated for <i>M. chryseres</i> (~272,000 years) and <i>N. aurolineatus</i> (~284,000 years) are more recent or comparable to the shallow-water holocentrids (~220,000–916,000 years). We conclude that the shallow genetic coalescence characteristic of shallow-water marine fishes cannot be attributed to frequent disturbance. We see no evidence from holocentrid species that MCEs are older or more stable habitats. |
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| issn | 1424-2818 |
| language | English |
| last_indexed | 2024-03-09T04:33:13Z |
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| spelling | doaj.art-b08bcbadb47640bf9f96ba37fc5aeba22023-12-03T13:33:04ZengMDPI AGDiversity1424-28182022-08-0114869110.3390/d14080691Phylogeography of Mesophotic Coral Ecosystems: Squirrelfish and Soldierfish (Holocentriformes: Holocentridae)Joshua M. Copus0Cameron A. J. Walsh1Mykle L. Hoban2Anne M. Lee3Richard L. Pyle4Randall K. Kosaki5Robert J. Toonen6Brian W. Bowen7Hawai‘i Institute of Marine Biology, University of Hawai‘i, Kaneohe, HI 96744, USAHawai‘i Institute of Marine Biology, University of Hawai‘i, Kaneohe, HI 96744, USAHawai‘i Institute of Marine Biology, University of Hawai‘i, Kaneohe, HI 96744, USAHawai‘i Institute of Marine Biology, University of Hawai‘i, Kaneohe, HI 96744, USACenter for the Exploration of Coral Reef Ecosystems (XCoRE), Bernice P. Bishop Museum, Honolulu, HI 96817, USACenter for the Exploration of Coral Reef Ecosystems (XCoRE), Bernice P. Bishop Museum, Honolulu, HI 96817, USAHawai‘i Institute of Marine Biology, University of Hawai‘i, Kaneohe, HI 96744, USAHawai‘i Institute of Marine Biology, University of Hawai‘i, Kaneohe, HI 96744, USAMesophotic coral ecosystems (MCEs: ~30 to 100+ m depth) may be older and more stable than shallow coral ecosystems that are more prone to disturbances in both the long term (glacial sea level cycles) and short term (heavy weather and anthropogenic activities). Here, we assess the phylogeography of two MCE fishes, the soldierfish <i>Myripristis chryseres</i> (N = 85) and the squirrelfish <i>Neoniphon aurolineatus</i> (N = 74), with mtDNA cytochrome oxidase C subunit I. Our goal is to resolve population genetic diversity across the Central and West Pacific and compare these patterns to three shallow-reef species in the same taxonomic family (Holocentridae). Significant population structure (Φ<sub>ST</sub> = 0.148, <i>p</i> = 0.01) was observed in <i>N. aurolineatus</i>, while no structure was detected in <i>M. chryseres</i> (Φ<sub>ST</sub> = −0.031, <i>p</i> = 0.83), a finding that matches the shallow-water congener <i>M. berndti</i> (Φ<sub>ST</sub> = −0.007, <i>p</i> = 0.63) across the same range. Nucleotide diversity in the MCE fishes was low (π = 0.0024–0.0028) compared to shallow counterparts (π = 0.003–0.006). Coalescence times calculated for <i>M. chryseres</i> (~272,000 years) and <i>N. aurolineatus</i> (~284,000 years) are more recent or comparable to the shallow-water holocentrids (~220,000–916,000 years). We conclude that the shallow genetic coalescence characteristic of shallow-water marine fishes cannot be attributed to frequent disturbance. We see no evidence from holocentrid species that MCEs are older or more stable habitats.https://www.mdpi.com/1424-2818/14/8/691mesophotic coral ecosystemsbiodiversitycoalescentcoral reefsdeep reef refugiafishes |
| spellingShingle | Joshua M. Copus Cameron A. J. Walsh Mykle L. Hoban Anne M. Lee Richard L. Pyle Randall K. Kosaki Robert J. Toonen Brian W. Bowen Phylogeography of Mesophotic Coral Ecosystems: Squirrelfish and Soldierfish (Holocentriformes: Holocentridae) Diversity mesophotic coral ecosystems biodiversity coalescent coral reefs deep reef refugia fishes |
| title | Phylogeography of Mesophotic Coral Ecosystems: Squirrelfish and Soldierfish (Holocentriformes: Holocentridae) |
| title_full | Phylogeography of Mesophotic Coral Ecosystems: Squirrelfish and Soldierfish (Holocentriformes: Holocentridae) |
| title_fullStr | Phylogeography of Mesophotic Coral Ecosystems: Squirrelfish and Soldierfish (Holocentriformes: Holocentridae) |
| title_full_unstemmed | Phylogeography of Mesophotic Coral Ecosystems: Squirrelfish and Soldierfish (Holocentriformes: Holocentridae) |
| title_short | Phylogeography of Mesophotic Coral Ecosystems: Squirrelfish and Soldierfish (Holocentriformes: Holocentridae) |
| title_sort | phylogeography of mesophotic coral ecosystems squirrelfish and soldierfish holocentriformes holocentridae |
| topic | mesophotic coral ecosystems biodiversity coalescent coral reefs deep reef refugia fishes |
| url | https://www.mdpi.com/1424-2818/14/8/691 |
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