Relative abundance and distribution of fishes and crayfish at Ash Meadows National Wildlife Refuge, Nye County, Nevada, 2010-11

Scoppettone, G.G.; Johnson, D. G.; Hereford, Mark E.; Rissler, Peter H.; Fabes, Mark C.; Salgado, Antonio; Shea, Sean P.

doi:10.3133/ofr20121141

Cited by 3 publications

(3 citation statements)

References 16 publications

(10 reference statements)

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“…The subspecies C. n. pectoralis was historically distributed across seven different springs: North Scruggs, South Scruggs, Marsh, North Indian, South Indian, School and Mexican. The five currently inhabited springs and their outflows are isolated from each other; moreover, pupfish are typically found near the springheads, with the exception of North and South Scruggs where there is a population downstream from a section without fish (Scopperttone et al 2009). In the case of South Scruggs, the lower, disjunct population exists below a dilapidated water diversion structure of unknown age.…”

Section: Methodsmentioning

confidence: 98%

“…LNS and LSS denote small marsh populations in the North Scruggs and South Scruggs outflow channels. Current outflows are shown in dark grey and predicted paleohydrological outflows are depicted in lighter shades of grey, with the different colors corresponding to different possible drainage configurations (Scopperttone et al 2009) (15 individuals) for the spring populations, and calculating observed and expected heterozygosity. Monte Carlo resampling using 100 replicates was used for calculating the mean standardized number of alleles.…”

Section: Methodsmentioning

confidence: 99%

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The conservation genetics of Ash Meadows pupfish populations. I. The Warm Springs pupfish Cyprinodon nevadensis pectoralis

Martin

2010

Conserv Genet

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The Warm Springs pupfish (Cyprinodon nevadensis pectoralis) inhabits several low flow (\0.15 cfs) springs in an otherwise dry Mojave Desert landscape. Increasing demands on groundwater coupled with predictions of decreased precipitation from global warming make this species a sentinel for biodiversity dependent on springs.Here we examine mitochondrial DNA haplotypes and nuclear microsatellite genotypes for individuals sampled in 1998 and 2007 as a means of inferring the historical demography of the subspecies. Estimates of genetic effective population size from comparison of allele frequencies over time underscores that all spring populations support small populations, typically \100 individuals. Such small population sizes suggest spring populations may have heightened probabilities of extirpation. Despite small population sizes, all springs harbor relatively high levels of genetic variation for both nuclear and mitochondrial DNA. Unexpectedly high levels of variation may be explained by recent declines in population size coupled with rare episodes of gene flow between springs suspected of occurring during flooding events. The inferences gained from the genetic data provide the basis for evaluating current and future restoration plans. The genetic data suggest there is a need to balance the predicted positive effects of restoring hydrological connectivity with the potential negative impacts of providing avenues for the spread of exotic species detrimental to pupfish populations.

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Section: Methodsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

The conservation genetics of Ash Meadows pupfish populations. I. The Warm Springs pupfish Cyprinodon nevadensis pectoralis

Martin

2010

Conserv Genet

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“…We compiled the locations of individual spring wetlands at Ash Meadows (Scoppettone et al, 2012), Byarri (Fensham and Laffineur, 2022)and at Cuatro Ciénegas (Wolaver et al, 2013). Discharge at Byarri was determined using a method relating wetland area to flow rates (Fensham and Laffineur, 2022) but including previously unmapped wetlands and another large wetland that had been excluded from previous discharge estimates because it had been artificially drained (Fensham and Laffineur, 2022).…”

Section: Geography Of Spring Complexesmentioning

confidence: 99%

Extraordinary concentrations of local endemism associated with arid-land springs

Fensham

Ponder

Souza

et al. 2023

Front. Environ. Sci.

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Introduction: While the biodiversity value of springs is recognised, it has not been systematically compiled. The aim of the current study is to highlight the extraordinary endemism associated with the isolated habitat of arid-land springs at three locations in two continents.Methods: The habitat endemism of the eukaryote species associated with the aquatic and terrestrial habitats at Ash Meadows in the USA, Byarri in Australia and Cuatro Ciénegas in Mexico was assembled based on their geographic distribution.Results: The currently-known aquatic and semi-aquatic endemic species number 27 at Ash Meadows, 31 at Byarri and 34 at Cuatro Ciénegas. Terrestrial endemic species are represented by two species at Ash Meadows, five at Byarri and 26 at Cuatro Ciénegas. The terrestrial endemics are associated with the scalded areas surrounding the springs impregnated with soda and gypsum. The persistence of the endemics is astonishing given that the wetlands represent tiny islands of habitat (216 small wetlands over 40 km2 in the case of Byarri).Discussion: A key factor for the persistence and radiation of endemic species is the stability and permanence of the wetlands over evolutionary time-scales. Genetic evidence indicates the presence of both paleo-endemics, species that persisted in spring wetlands as relics of previous mesic climates; and neo-endemics that have dispersed from more mesic environments and subsequently radiated in the spring wetlands as distinct forms. The former evolved from their relatives greater than 106 ya and the latter less than 106 ya. The concentration of endemic species in and around arid-land springs is among the highest concentrations of endemic organisms specialised to a particular habitat and substantiates the paramount conservation significance of desert springs.

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Following the Fate of Facilitated Migration In A Small Desert Spring

Keepers

Kane

Martin

2018

The Southwestern Naturalist

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Relative abundance and distribution of fishes and crayfish at Ash Meadows National Wildlife Refuge, Nye County, Nevada, 2010-11

Cited by 3 publications

References 16 publications

The conservation genetics of Ash Meadows pupfish populations. I. The Warm Springs pupfish Cyprinodon nevadensis pectoralis

The conservation genetics of Ash Meadows pupfish populations. I. The Warm Springs pupfish Cyprinodon nevadensis pectoralis

Extraordinary concentrations of local endemism associated with arid-land springs

Following the Fate of Facilitated Migration In A Small Desert Spring

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