Population Structure of the Tallapoosa Shiner (Cyprinella gibbsi) and the Tallapoosa Darter (Etheostoma tallapoosae)

Connelly, Heather; Tabit, Christopher R.; Kral, Leos G.

doi:10.1656/1528-7092(2006)5[85:psotts]2.0.co;2

Cited by 5 publications

(13 citation statements)

References 11 publications

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“…These distributional patterns, in addition to the lack of appropriate substratum and spawning habitat in reservoirs, indicate that lentic habitats of reservoirs probably represent inhospitable conditions for these two species. Previous studies of mtDNA variation in both species revealed slightly higher levels of genetic structuring in E. tallapoosae when compared to C. gibbsi , and although both species exhibited some rangewide genetic structuring, both showed evidence for recent or ongoing gene flow between populations separated by approximately 90 km in unimpounded sections of the Tallapoosa River (Brogdon, Tabit & Kral, ; Connelly, Tabit & Kral, ).…”

Section: Methodsmentioning

confidence: 74%

“…However, each of the three Martin Lake populations of C. gibbsi defined by Connelly et al . () shares haplotypes with populations in the uppermost reaches of the Tallapoosa River, suggesting somewhat recent associations of upper and lower Tallapoosa River populations of C. gibbsi . Brogdon et al .…”

Section: Discussionmentioning

confidence: 89%

“…For example, Connelly et al . () examined mtDNA variation throughout most of the range of C. gibbsi , including samples from Oakachoy Creek, two tributaries that enter Martin Lake near its upstream terminus (upstream of Elkahatchee Creek), and seven sites upstream of Martin Lake (all above Chatahospee Creek) encompassing the upper extent of the Tallapoosa River drainage. Their results suggested significant genetic structuring among four groups; each of the three tributaries entering Martin Lake was distinct, and the remaining seven sites spanning the upper Tallapoosa River drainage were resolved in a single distinct group.…”

Section: Discussionmentioning

confidence: 99%

“…However, they only analysed two of the sites of Connelly et al . () that enter Martin Lake above Elkahatchee Creek, and 11 sites in the upper Tallapoosa River drainage. Brogdon et al .…”

Section: Discussionmentioning

confidence: 99%

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The effects of riverine impoundment on genetic structure and gene flow in two stream fishes in the Mobile River basin

2013

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Summary Riverine impoundments (reservoirs) are thought to impede natural migration in small‐stream‐inhabiting fishes, resulting in spatially and genetically fragmented populations. However, this hypothesis remains poorly tested, and the genetic consequences of riverine impoundment for stream fishes with differing dispersal capabilities are not well understood. This study utilised a combination of microsatellite DNA loci from 479 individuals and the mitochondrial (mt) DNA cytochrome b gene (810–1140 bp) from 83 individuals from eight streams to compare genetic structure and diversity between reservoir‐fragmented and non‐fragmented groups of two species of stream fishes with differing dispersal capabilities in the Mobile River basin of the south‐eastern United States. For both species, analysis of microsatellite loci revealed genetic discontinuities between neighbouring tributaries that have been fragmented by reservoir construction. This finding was in stark contrast to the high degree of continuity for both species between reference tributaries in a natural river setting. Results from mtDNA revealed no significant genetic structure within reservoir‐fragmented or non‐fragmented groups, indicating a lack of historical genetic structure (i.e. prior to reservoir construction). Microsatellite‐based estimates of genetic diversity and migration were differentially affected in the two species, indicating that stream fishes with relatively high dispersal abilities may be equally or more susceptible to reservoir fragmentation when compared to species with relatively low dispersal abilities. Collectively, our data revealed that riverine impoundment and reservoir‐induced habitat fragmentation adversely affect genetic characteristics in small‐stream‐inhabiting fishes. This is of particular interest in biodiversity hotspots such as the south‐eastern United States where hydroelectric and recreational reservoirs restrict connectivity in aquatic systems.

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Section: Methodsmentioning

confidence: 74%

Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

“…However, they only analysed two of the sites of Connelly et al . () that enter Martin Lake above Elkahatchee Creek, and 11 sites in the upper Tallapoosa River drainage. Brogdon et al .…”

Section: Discussionmentioning

confidence: 99%

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The effects of riverine impoundment on genetic structure and gene flow in two stream fishes in the Mobile River basin

2013

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“…Three of these management units are in the same area of the lower Tallapoosa basin as most of the F. bifax collections sites reported herein. The Tallapoosa shiner Cypri nella gibbsi, also with a current distribution from the Georgia headwater of the Tallapoosa River to the fall line, was found to have a similar population structure to E. tallapoosae based on the analysis of mitochondrial ND4L sequences (Connelly et al 2006). This similar distribution of genetically distinct populations within these 2 species suggests that they share a common biogeographic history (Connelly et al 2006).…”

Section: Consensus T T a G A T T C A A A A T G T G C C T C T T A A Tmentioning

confidence: 93%

Status of the stippled studfish Fundulus bifax, a killifish endemic to the Tallapoosa River basin, USA

Stallsmith¹

2013

Endang. Species. Res.

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The stippled studfish Fundulus bifax, which is endemic to the Tallapoosa River system of Alabama and Georgia, USA, has been considered at risk due to habitat degradation. Requisite habitat for this species is clean water over clean sand in small or large streams. F. bifax is apparently extirpated in Georgia, and appears increasingly uncommon in Alabama. This has resulted in a global ranking of N2N3, imperiled/vulnerable, from NatureServe. In 2008, 24 Tallapoosa River drainage sites in Alabama were visited in an effort to document the current status of this species. Many of these were locations where the fish has been collected since 1980, as documented in the University of Alabama Ichthyology Collection. At least 1 individual was found in each of 6 different creek systems in Coosa, Elmore, Randolph, and Tallapoosa Counties. This is a contraction of what has been considered this species' range, and appears to be the result of habitat degradation. To examine genetic variation between existing populations, and between 2 closely related species, 852 bases of the mitochondrial cytochrome b gene of 10 individuals were compared through neighbor-joining and Bayesian tree building, and through calculating genetic distance, D. Both analyses showed existing populations of F. bifax to be monophyletic, with low genetic variation between them. Neither of its putative closest relatives, F. catenatus and F. stellifer, was found to be more closely related to F. bifax. The future of the species is in doubt, with 6 disjunct populations being vulnerable to further habitat degradation and diminished gene flow. KEY WORDS: Cytochrome b · Habitat degradation · Alabama Resale or republication not permitted without written consent of the publisherEndang Species Res 20: 19-25, 2013 Fundulus bifax is part of the studfish clade, subgenus Xenisma, with 5 extant and 1 extinct species. This clade is considered to be monophyletic based on morphological data (Cashner et al. 1992). F. bifax was formerly included in F. stellifer until it was described as a species in 1988 based on differences in breeding coloration and pigmentation patterns (Cashner et al. 1988). Allozyme data showed F. bifax to be more closely related to F. catenatus, even though the range of F. stellifer immediately abuts that of F. bifax, while the nearest populations of F. catenatus are ~200 km to the north (Cashner et al. 1992).The current project has 2 linked parts. The first part was intended primarily as a presence/absence survey of Fundulus bifax at historic location sites in Alabama based on holdings of the University of Alabama Ichthyology Collection (UAIC) in Tuscaloosa, Alabama. The Alabama section represents most of the historic range and may currently be the entire range. The second part of the project was to characterize the genetic diversity of F. bifax at the cytochrome b locus of mitochondrial DNA, as well as its relationship with its 2 closest relatives, F. catenatus and F. stellifer. MATERIALS AND METHODS Stream surveyThe UAIC provided a list of k...

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Cryptic diversity within two endemic crayfish species of the Southeastern US revealed by molecular genetics and geometric morphometrics

et al. 2015

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Population Structure of the Tallapoosa Shiner (Cyprinella gibbsi) and the Tallapoosa Darter (Etheostoma tallapoosae)

Cited by 5 publications

References 11 publications

The effects of riverine impoundment on genetic structure and gene flow in two stream fishes in the Mobile River basin

The effects of riverine impoundment on genetic structure and gene flow in two stream fishes in the Mobile River basin

Status of the stippled studfish Fundulus bifax, a killifish endemic to the Tallapoosa River basin, USA

Cryptic diversity within two endemic crayfish species of the Southeastern US revealed by molecular genetics and geometric morphometrics

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