Molecular Systematics of the Cyprinid Genus Campostoma (Actinopterygii: Cypriniformes): Disassociation between Morphological and Mitochondrial Differentiation

Blum, Michael J.; Neely, David A.; Harris, Phillip M.; Mayden, Richard L.

doi:10.1643/ci-06-093

Cited by 29 publications

(41 citation statements)

References 19 publications

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“…Therefore observations across the entire basin might not have captured the full range of responses to environmental conditions. Although our results are consistent with hierarchical environmental filtering of genetic diversity and species diversity, excluding alternative explanations for observed patterns of divergence and spatially varying responses-such as historical interactions with the adjacent Scioto River and Great Miami River basins via headwater capture events (Bagley et al 2002)-will require comparisons between the LMR and adjacent river basins (Bagley et al 2002;Blum et al 2008).…”

Section: Relationships Between Genetic Diversity and Species Diversitysupporting

confidence: 74%

Genetic diversity and species diversity of stream fishes covary across a land-use gradient

Blum

Bagley²,

Walters³

et al. 2011

Oecologia

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Genetic diversity and species diversity are expected to covary according to area and isolation, but may not always covary with environmental heterogeneity. In this study, we examined how patterns of genetic and species diversity in stream fishes correspond to local and regional environmental conditions. To do so, we compared population size, genetic diversity and divergence in central stonerollers (Campostoma anomalum) to measures of species diversity and turnover in stream fish assemblages among similarly sized watersheds across an agriculture-forest land-use gradient in the Little Miami River basin (Ohio, USA). Significant correlations were found in many, but not all, pair-wise comparisons. Allelic richness and species richness were strongly correlated, for example, but diversity measures based on allele frequencies and assemblage structure were not. In-stream conditions related to agricultural land use were identified as significant predictors of genetic diversity and species diversity. Comparisons to population size indicate, however, that genetic diversity and species diversity are not necessarily independent and that variation also corresponds to watershed location and glaciation history in the drainage basin. Our findings demonstrate that genetic diversity and species diversity can covary in stream fish assemblages, and illustrate the potential importance of scaling observations to capture responses to hierarchical environmental variation. More comparisons according to life history variation could further improve understanding of conditions that give rise to parallel variation in genetic diversity and species diversity, which in turn could improve diagnosis of anthropogenic influences on aquatic ecosystems.

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Section: Relationships Between Genetic Diversity and Species Diversitysupporting

confidence: 74%

Genetic diversity and species diversity of stream fishes covary across a land-use gradient

Blum

Bagley²,

Walters³

et al. 2011

Oecologia

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“…Central stoneroller is widespread throughout the eastern United States and Canada, and at least six distinct evolutionary entities of this polytypic species are recognized. In fact, Blum et al (2008) suggest that populations of C. anomalum in the upper New River basin represent a yet-to-be-described species (Campostoma sp., the Virginia stoneroller). Similar cladistic patterns are evident in Nocomis, including the potential elevation of a new species endemic to the upper Roanoke and New River drainages (Nocomis sp.…”

Section: Discussionmentioning

confidence: 99%

“…A more thorough understanding of Campostoma nesting habitat requirements across a larger geographic extent will yield better insight into the reproductive ecology of these species, and by extension their nest associates. This information may be particularly useful as the true diversity of these genera continues to be revealed (Blum et al 2008;Cashner et al 2010;Nagle & Simons 2012). Nesting microhabitat preference of stonerollers differed from chubs.…”

Section: Discussionmentioning

confidence: 99%

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Nesting microhabitat comparison of Central stoneroller and Bluehead chub: potential inference for host-switching by nest associates

Peoples

Floyd

Frimpong

2015

Journal of Freshwater Ecology

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Several nest-building North American minnows (Cyprinidae) function as reproductive hosts to nest associatesÀspecies that require nests of other species for spawning. Understanding the microhabitat preferences of hosts can yield insight into the reproductive ecology of many species, especially of nest associates that can utilize nests of two or more hosts. We observed nests of Central stoneroller Campostoma anomalum in which several associate species were actively spawning. Bluehead chubs Nocomis leptocephalus began constructing nests two days later in the same stream, at which time associates abandoned stoneroller nests and continued on to spawn on chub nests. This presented a unique opportunity for accomplishing two objectives: (1) quantifying stoneroller nesting microhabitat preference and (2) comparing stoneroller and chub habitat preference to gain insight into the mechanisms that may drive host switching by nest associates. We measured substrate size, current velocity, water depth, and egg depth on seven paired stoneroller and chub nests, and compared these measurements to paired microhabitat measurements at a randomly selected point near each nest. Repeated measures analysis of variance with post hoc Tukey tests revealed that stonerollers exhibited distinct nesting microhabitat preferences from chubs. Gravel on stoneroller nests was considerably smaller than on chub nests and stonerollers nested in shallower depths than chubs. However, both species nested at similar current velocities. If nest associates switch partners based on the physical characteristics of nests, then substrate size is likely the most important factor. The larger gravel sizes on chub nests likely provide better egg aeration than stoneroller nests. Chub nests may also be safer for associate broods because male Bluehead chubs cover eggs with gravel after spawning; stonerollers do not. Future work should take an experimental approach to elucidate these mechanisms.

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“…In fact, some of those widespread species have been split into more than one taxon, in light of their genetic divergence and morphological differentiation [14,29,30]. This was the case for Campostoma anomalum , which was previously regarded as a complex of three widespread and morphologically divergent subspecies, whose five distinct evolutionary lineages warranted species status [31,32]. The species Campostoma ornatum , also with a wide distribution range and morphological variation, is also likely to show deep intraspecific genetic differentiation because populations from southern drainages (Nazas, Aguanaval and Piaxtla rivers) show a differentiated morphotype [24] and there is remarkable endemicity in the ichthyofauna of the Nazas river [33,34].…”

Section: Introductionmentioning

confidence: 99%

Complex evolutionary history of the Mexican stoneroller Campostoma ornatum Girard, 1856 (Actinopterygii: Cyprinidae)

et al. 2011

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BackgroundStudies of the phylogeography of Mexican species are steadily revealing genetic patterns shared by different species, which will help to unravel the complex biogeographic history of the region. Campostoma ornatum is a freshwater fish endemic to montane and semiarid regions in northwest Mexico and southern Arizona. Its wide range of distribution and the previously observed morphological differentiation between populations in different watersheds make this species a useful model to investigate the biogeographic role of the Sierra Madre Occidental and to disentangle the actions of Pliocene tecto-volcanic processes vs Quaternary climatic change. Our phylogeographic study was based on DNA sequences from one mitochondrial gene (cytb, 1110 bp, n = 285) and two nuclear gene regions (S7 and RAG1, 1822 bp in total, n = 56 and 43, respectively) obtained from 18 to 29 localities, in addition to a morphological survey covering the entire distribution area. Such a dataset allowed us to assess whether any of the populations/lineages sampled deserve to be categorised as an evolutionarily significant unit.ResultsWe found two morphologically and genetically well-differentiated groups within C. ornatum. One is located in the northern river drainages (Yaqui, Mayo, Fuerte, Sonora, Casas Grandes, Santa Clara and Conchos) and another one is found in the southern drainages (Nazas, Aguanaval and Piaxtla). The split between these two lineages took place about 3.9 Mya (CI = 2.1-5.9). Within the northern lineage, there was strong and significant inter-basin genetic differentiation and also several secondary dispersal episodes whit gene homogenization between drainages. Interestingly, three divergent mitochondrial lineages were found in sympatry in two northern localities from the Yaqui river basin.ConclusionsOur results indicate that there was isolation between the northern and southern phylogroups since the Pliocene, which was related to the formation of the ancient Nazas River paleosystem, where the southern group originated. Within groups, a complex reticulate biogeographic history for C. ornatum populations emerges, following the taxon pulse theory and mainly related with Pliocene tecto-volcanic processes. In the northern group, several events of vicariance promoted by river or drainage isolation episodes were found, but within both groups, the phylogeographic patterns suggest the occurrence of several events of river capture and fauna interchange. The Yaqui River supports the most diverse populations of C. ornatum, with several events of dispersal and isolation within the basin. Based on our genetic results, we defined three ESUs within C. ornatum as a first attempt to promote the conservation of the evolutionary processes determining the genetic diversity of this species. They will likely be revealed as a valuable tool for freshwater conservation policies in northwest Mexico, where many environmental problems concerning the use of water have rapidly arisen in recent decades.

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Molecular Systematics of the Cyprinid Genus Campostoma (Actinopterygii: Cypriniformes): Disassociation between Morphological and Mitochondrial Differentiation

Cited by 29 publications

References 19 publications

Genetic diversity and species diversity of stream fishes covary across a land-use gradient

Genetic diversity and species diversity of stream fishes covary across a land-use gradient

Nesting microhabitat comparison of Central stoneroller and Bluehead chub: potential inference for host-switching by nest associates

Complex evolutionary history of the Mexican stoneroller Campostoma ornatum Girard, 1856 (Actinopterygii: Cyprinidae)

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