Range-wide population genetic analysis of the endangered northern riffleshell mussel, Epioblasma torulosa rangiana (Bivalvia: Unionoida)

Zanatta, David T.; Murphy, Robert W.

doi:10.1007/s10592-007-9290-6

Cited by 34 publications

(22 citation statements)

References 49 publications

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“…arkansasensis complex (3.4%) compared to Potamilus (1.32%) and Quadrula (3.65%) (Roe and Lydeard 1998;Serb et al 2003)], and significant positive isolation by distance patterns. These patterns of isolation by distance have been observed in other freshwater mussel species; Actinonaias ligamentina (LaMarck 1819) (Elderkin et al 2008), Elliptio dilatata (Rafinesque 1820) Elderkin et al 2008), Epioblasma torulosa rangiana (Lea 1838) (Zanatta and Murphy 2007), and Unio pictorum (Linnaeus 1758) (Zieritz et al 2010 ). All of these species have small home ranges and poor dispersal abilities (Greenberg 1991;Gatz 2007).…”

Section: Genetic Structuresupporting

confidence: 54%

Phylogenetic and morphometric analyses reveal ecophenotypic plasticity in freshwater musselsObovaria jacksonianaandVillosa arkansasensis(Bivalvia:Unionidae)

Inoue

Hayes

Harris

et al. 2013

Ecology and Evolution

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Freshwater mollusk shell morphology exhibits clinal variation along a stream continuum that has been termed the Law of Stream Distribution. We analyzed phylogenetic relationships and morphological similarity of two freshwater mussels (Bivalvia: Unionidae), Obovaria jacksoniana and Villosa arkansasensis, throughout their ranges. The objectives were to investigate phylogenetic structure and evolutionary divergence of O. jacksoniana and V. arkansasensis and morphological similarity between the two species. Our analyses were the first explicit tests of phenotypic plasticity in shell morphologies using a combination of genetics and morphometrics. We conducted phylogenetic analyses of mitochondrial DNA (1416 bp; two genes) and morphometric analyses for 135 individuals of O. jacksoniana and V. arkansasensis from 12 streams. We examined correlations among genetic, morphological, and spatial distances using Mantel tests. Molecular phylogenetic analyses revealed a monophyletic relationship between O. jacksoniana and V. arkansasensis. Within this O. jacksoniana/V. arkansasensis complex, five distinct clades corresponding to drainage patterns showed high genetic divergence. Morphometric analysis revealed relative differences in shell morphologies between the two currently recognized species. We conclude that morphological differences between the two species are caused by ecophenotypic plasticity. A series of Mantel tests showed regional and local genetic isolation by distance. We observed clear positive correlations between morphological and geographic distances within a single drainage. We did not observe correlations between genetic and morphological distances. Phylogenetic analyses suggest O. jacksoniana and V. arkansasensis are synonomous and most closely related to a clade composed of O. retusa, O. subrotunda, and O. unicolor. Therefore, the synonomous O. jacksoniana and V. arkansasensis should be recognized as Obovaria arkansasensis (Lea 1862) n. comb. Phylogenetic analyses also showed relative genetic isolation among drainages, suggesting no current gene flow. Further investigation of in-progress speciation and/or cryptic species within O. arkansasensis is warranted followed by appropriate revision of conservation management designations.

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Section: Genetic Structuresupporting

confidence: 54%

Phylogenetic and morphometric analyses reveal ecophenotypic plasticity in freshwater musselsObovaria jacksonianaandVillosa arkansasensis(Bivalvia:Unionidae)

Inoue

Hayes

Harris

et al. 2013

Ecology and Evolution

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“…The problems of silt pollution, unsympathetic riparian management, habitat fragmentation and declining host populations need to be addressed whilst there are still sufficient numbers of reproductively viable adult mussels. In common with other freshwater mussels (Berg et al 2007, Elderkin et al 2007, Zanatta & Murphy 2007, M. margaritifera shows a significant degree of population structuring (Machordom et al 2003), even at small spatial scales (Geist & Kuehn 2005, Bouza et al 2007. Areas colonised by M. margaritifera since the last glacial maxima display high genetic diversity (Geist & Kuehn 2008, Geist et al 2009, and this may be indica-tive of locally adapted populations, as seen in their salmonid hosts (Garcia de Leaniz et al 2007), and should be taken into account when developing ex situ conservation programmes for the species (Geist & Kuehn 2005).…”

Section: Discussionmentioning

confidence: 99%

Captive breeding of the endangered freshwater pearl mussel Margaritifera margaritifera

Thomas¹,

Taylor²,

et al. 2010

Endang. Species. Res.

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Freshwater pearl mussels (Unionidae: Bivalvia) rank among the most endangered aquatic invertebrates, and this has recently prompted a number of initiatives designed to propagate the species through captive breeding. Yet there are few guidelines to aid in freshwater mussel culture for conservation, and few or no results on the fate of released juveniles. We reviewed various ex situ strategies for freshwater mussel conservation with emphasis on the freshwater pearl mussel Margaritifera margaritifera (L.), one of the most critically endangered unionids. Captive breeding could help safeguard critically endangered populations, but current rearing methods need to be optimised. Areas in particular need of research include the collection and storage of viable glochidia, the development of efficient rearing systems, and the formulation of algal diets. Likewise, the degree of host specificity warrants further investigation, as this will largely dictate the success of reintroduction programmes. Finally, we note that more information is needed on the degree of genetic structuring and post-release survival before translocation programmes can be recommended. As with other conservation projects, captive breeding of the freshwater pearl mussel cannot compensate for loss of critical habitats and is likely to be most efficient in combination with in situ conservation, not in isolation.

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“…2001; Jones et al . 2006; Zannatta & Murphy 2007), yet very few nonendangered species have been studied (Turner et al . 2000; Elderkin et al .…”

Section: Introductionmentioning

confidence: 99%

Population genetics and phylogeography of freshwater mussels in North America, Elliptio dilatata and Actinonaias ligamentina (Bivalvia: Unionidae)

et al. 2008

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Extrinsic and intrinsic forces combined shape the population structure of every species differently. Freshwater mussels are obligate parasites to a host fish during a juvenile stage (glochidia). Elliptio dilatata (ED) and Actinonaias ligamentina (AL) are co-occurring freshwater mussel taxa with similar North American distribution and share some potential host fish. Using mitochondrial DNA, we determined the genotypes of 190 + individuals from collection sites in at least two tributaries in the Lake Erie and Ohio River watersheds, along with the Ouachita and Strawberry rivers in the southeast. Both species had followed a stepping-stone model of dispersal, with greater pairwise genetic structure among collection sites of ED. Also, phylogeographical analysis for ED found significant geographical structuring of haplotype diversity. Overall, within-population variation increased significantly from north to south, with low genetic diversity in the Strawberry River. We calculated significant among-population structure for both species (ED: Phi(ST) = 0.62, P < 0.001; AL: Phi(ST) = 0.16, P < 0.001). Genetic analysis identified the Ouachita River as an area of significant reproductive isolation for both species. Results for AL indicated dispersal into northern areas from two genetically distinct glacial refugia, where results for ED indicated dispersal followed by low gene flow in northern areas. The conservation strategies for mussels that co-occur in the same 'bed' could be species specific. Species such as ED have management units on the population scale, where AL has a more homogeneous genetic structure across its range.

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Range-wide population genetic analysis of the endangered northern riffleshell mussel, Epioblasma torulosa rangiana (Bivalvia: Unionoida)

Cited by 34 publications

References 49 publications

Phylogenetic and morphometric analyses reveal ecophenotypic plasticity in freshwater musselsObovaria jacksonianaandVillosa arkansasensis(Bivalvia:Unionidae)

Phylogenetic and morphometric analyses reveal ecophenotypic plasticity in freshwater musselsObovaria jacksonianaandVillosa arkansasensis(Bivalvia:Unionidae)

Captive breeding of the endangered freshwater pearl mussel Margaritifera margaritifera

Population genetics and phylogeography of freshwater mussels in North America, Elliptio dilatata and Actinonaias ligamentina (Bivalvia: Unionidae)

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