Riverscape genetics identifies speckled dace (Rhinichthys osculus) cryptic diversity in the Klamath–Trinity Basin

Wiesenfeld, Jesse C.; Goodman, Damon H.; Kinziger, Andrew P.

doi:10.1007/s10592-017-1027-6

Cited by 5 publications

(2 citation statements)

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“…The results indicate that: 1) gene flow among Allyn Brook populations is limited and not sufficient to prevent in situ differentiation; and 2) that the isolation of Allyn Brook populations from Coginchaug River populations over the last 80+ years has resulted in larger genetic distinctions among populations. These results are consistent with findings from several species of Rhinichthys [12] [20] [39] [40] [41] and other related North American cyprinids, e.g., Phoxinus and Gila [42] [43] that revealed cryptic genetic diversity and inter-or intra-basin genetic diversity, suggesting little or no current gene flow. However, these studies were performed on larger spatial scales, on the order of km's.…”

Section: The Results Of Amovas and Bayesian A Posteriori Classifications Of Allynsupporting

confidence: 91%

Microgeographic Variation and Inter-Riffle Migration of <i>Rhinichthys atratulus</i> (Pisces: Cyprinidae) in a Small Connecticut Stream, United States

Loomis¹,

Anatone²,

Bither³

et al. 2020

OJE

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We examined the genetic diversity on a microgeographic scale of Rhinichthys atratulus (Eastern Blacknose Dace) in Allyn Brook, a small tributary in the upper Coginchaug River drainage in Connecticut. By looking at gene flow on a microgeographic scale among populations that had no physical barriers to migration, we tested the null hypothesis that the populations should be homogeneous. We resolved seven polymorphic microsatellite loci and one mitochondrial gene, nd2, in three adjacent populations (<0.5 km) in Allyn Brook and compared these populations to the two closest populations (>5 km) in the Coginchaug River. A dam from the 1920's in lower Allyn Brook has isolated Allyn-Brook populations from Coginchaug-River populations. Allyn Brook was selected because there are only three riffle habitats in the brook and, therefore, there can be no immigration from upstream populations. Each population has private (i.e., unique) alleles and haplotypes, and there are significant genetic differences between all sites. The Allyn Brook populations are almost as different from one another as they are from the distant populations in the Coginchaug River from which they have been isolated for more than 80 years. These results point to in situ evolution and little migration or gene flow among populations on a microgeographic scale. This raises interesting questions for conservation of genetic diversity of stream fishes.

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Section: The Results Of Amovas and Bayesian A Posteriori Classifications Of Allynsupporting

confidence: 91%

Microgeographic Variation and Inter-Riffle Migration of <i>Rhinichthys atratulus</i> (Pisces: Cyprinidae) in a Small Connecticut Stream, United States

Loomis¹,

Anatone²,

Bither³

et al. 2020

OJE

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“…We interpret these patterns as reflecting separate, recently diverged subpopulations within the population that occupies the Warner Lakes basin outside of the Coleman subbasin. Wiesenfeld et al [ 81 ] obtained similar results from Western Speckled Dace within California’s Klamath-Trinity basin, where they discovered three genetic clusters despite the lack of any obvious physical barrier separating two of them. If this kind of substructure within river systems is typical for Rhinichthys klamathensis , it might indicate that individuals tend towards strong site fidelity.…”

Section: Discussionmentioning

confidence: 82%

Genetic approaches reveal a healthy population and an unexpectedly recent origin for an isolated desert spring fish

Sidlauskas,

Mathur,

Aydoğan

et al. 2024

BMC Ecol Evo

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Foskett Spring in Oregon’s desert harbors a historically threatened population of Western Speckled Dace (Rhinichthys klamathensis). Though recently delisted, the dace’s recruitment depends upon regular removal of encroaching vegetation. Previous studies assumed that Foskett Dace separated from others in the Warner Valley about 10,000 years ago, thereby framing an enigma about the population’s surprising ability to persist for so long in a tiny habitat easily overrun by plants. To investigate that persistence and the effectiveness of interventions to augment population size, we assessed genetic diversity among daces inhabiting Foskett Spring, a refuge at Dace Spring, and three nearby streams. Analysis revealed a robust effective population size (Ne) of nearly 5000 within Foskett Spring, though Ne in the Dace Spring refuge is just 10% of that value. Heterozygosity is slightly lower than expected based on random mating at all five sites, indicating mild inbreeding, but not at a level of concern. These results confirm the genetic health of Foskett Dace. Unexpectedly, genetic differentiation reveals closer similarity between Foskett Dace and a newly discovered population from Nevada’s Coleman Creek than between Foskett Dace and dace elsewhere in Oregon. Demographic modeling inferred Coleman Creek as the ancestral source of Foskett Dace fewer than 1000 years ago, much more recently than previously suspected and possibly coincident with the arrival of large herbivores whose grazing may have maintained open water suitable for reproduction. These results solve the enigma of persistence by greatly shortening the duration over which Foskett Dace have inhabited their isolated spring.

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Phylogeography and population structure of the Rock Darter species complex, Etheostoma rupestre (Teleostomi: Percidae) across the Mobile River Basin

2023

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Riverscape genetics identifies speckled dace (Rhinichthys osculus) cryptic diversity in the Klamath–Trinity Basin

Cited by 5 publications

References 61 publications

Microgeographic Variation and Inter-Riffle Migration of <i>Rhinichthys atratulus</i> (Pisces: Cyprinidae) in a Small Connecticut Stream, United States

Microgeographic Variation and Inter-Riffle Migration of <i>Rhinichthys atratulus</i> (Pisces: Cyprinidae) in a Small Connecticut Stream, United States

Genetic approaches reveal a healthy population and an unexpectedly recent origin for an isolated desert spring fish

Phylogeography and population structure of the Rock Darter species complex, Etheostoma rupestre (Teleostomi: Percidae) across the Mobile River Basin

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Riverscape genetics identifies speckled dace (Rhinichthys osculus) cryptic diversity in the Klamath–Trinity Basin

Cited by 5 publications

References 61 publications

Microgeographic Variation and Inter-Riffle Migration of &lt;i&gt;Rhinichthys atratulus&lt;/i&gt; (Pisces: Cyprinidae) in a Small Connecticut Stream, United States

Microgeographic Variation and Inter-Riffle Migration of &lt;i&gt;Rhinichthys atratulus&lt;/i&gt; (Pisces: Cyprinidae) in a Small Connecticut Stream, United States

Genetic approaches reveal a healthy population and an unexpectedly recent origin for an isolated desert spring fish

Phylogeography and population structure of the Rock Darter species complex, Etheostoma rupestre (Teleostomi: Percidae) across the Mobile River Basin

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About

Microgeographic Variation and Inter-Riffle Migration of <i>Rhinichthys atratulus</i> (Pisces: Cyprinidae) in a Small Connecticut Stream, United States

Microgeographic Variation and Inter-Riffle Migration of <i>Rhinichthys atratulus</i> (Pisces: Cyprinidae) in a Small Connecticut Stream, United States