title: Small fishes crossed a large mountain range: Quaternary stream capture events and freshwater fishes on both sides of the Taebaek Mountains.
abstract: The Taebaek Mountains in Korea serve as the most apparent biogeographic barrier for Korean freshwater fishes, resulting in 2 distinct ichthyofaunal assemblages on the eastern (East/Japan Sea slope) and western (Yellow Sea and Korea Strait slopes) sides of the mountain range. Of nearly 100 species of native primary freshwater fishes in Korea, only 18 species occur naturally on both sides of the mountain range. Interestingly, there are 5 rheophilic species (Phoxinus phoxinus, Coreoleuciscus splendidus, Ladislavia taczanowskii, Iksookimia koreensis and Koreocobitis rotundicaudata) found on both sides of the Taebaek Mountains that are geographically restricted to the Osip River (and several neighboring rivers, for L. taczanowskii and I. koreensis) on the eastern side of the mountain range. The Osip River and its neighboring rivers also shared a rheophilic freshwater fish, Liobagrus mediadiposalis, with the Nakdong River on the western side of the mountain range. We assessed historical biogeographic hypotheses on the presence of these rheophilic fishes, utilizing DNA sequence data from the mitochondrial cytochrome b gene. Results of our divergence time estimation indicate that ichthyofaunal transfers into the Osip River (and several neighboring rivers in East Sea slope) have occurred from the Han (Yellow Sea slope) and Nakdong (Korea Strait slope) Rivers since the Late Pleistocene. The inferred divergence times for the ichthyofaunal transfer across the Taebaek Mountains were consistent with the timing of hypothesized multiple reactivations of the Osip River Fault (Late Pleistocene), suggesting that the Osip River Fault reactivations may have caused stream capture events, followed by ichthyofaunal transfer, not only between the Osip and Nakdong Rivers, but also between the Osip and Han Rivers.
authors: Division of EcoScience, Ewha Womans University, Seoul, Korea.
authors: Daemin
authors: D
authors: Kim
authors: Department of Fisheries, Wildlife and Conservation Biology, Saint Paul, Minnesota, USA.
authors: M Vincent
authors: MV
authors: Hirt
authors: Division of EcoScience, Ewha Womans University, Seoul, Korea.
authors: Yong-Jin
authors: YJ
authors: Won
authors: Department of Fisheries, Wildlife and Conservation Biology, Saint Paul, Minnesota, USA.|Bell Museum of Natural History, University of Minnesota, 100 Ecology Building, Saint Paul, Minnesota, USA.
authors: Andrew M
authors: AM
authors: Simons
mesh_terms: D000818:Animals; D004272:DNA, Mitochondrial; D005399:Fishes / Q000235:genetics*; D005618:Fresh Water; D007723:Korea; D010802:Phylogeny; D045483:Rivers
chemical_list: D004272:DNA, Mitochondrial
keywords: Korean fishes; Osipcheon fault; biogeographic barrier; comparative phylogeography; divergence time