Changes in active eolian sand at northern Coachella Valley, California

Katra, Itzhak; Scheidt, S. P.; Lancaster, Nicholas

doi:10.1016/j.geomorph.2008.10.004

Cited by 14 publications

(10 citation statements)

References 28 publications

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“…There are four main areas of aeolian deposits in this region: 1) sand sheets and small dune fields in the Coachella Valley (Beheiry, 1967;Wasklewicz and Meek, 1995;Griffiths et al, 2002;Katra et al, 2009); 2) the active complex crescentic Algodones Dunes of southeastern California (Sweet et al, 1988;Derickson et al, 2008); 3) source-bordering dunes in the Gila River valley (Wright et al, 2011) and adjacent to the Colorado River (Parker dunes); and 4) the Gran Desierto sand sea of northern Mexico (Blount and Lancaster, 1990;Beveridge et al, 2006;Scheidt et al, 2011). The Colorado River has provided sediment for the Parker and Algodones dunes, and large parts of the Gran Desierto sand sea (Muhs et al, 1995Scheidt et al, 2011).…”

Section: Colorado and Lower Sonoran Desertsmentioning

confidence: 99%

Interpretations and common challenges of aeolian records from North American dune fields

Halfen

Lancaster

Wolfe

2016

Quaternary International

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Section: Colorado and Lower Sonoran Desertsmentioning

confidence: 99%

Interpretations and common challenges of aeolian records from North American dune fields

Halfen

Lancaster

Wolfe

2016

Quaternary International

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“…Collectively, this barrier impacts sand movement and lizard density (Turner et al, 1984) and likely reduces or precludes movement among local populations. More recent urbanization and warming trends have led to further loss of sand habitat and fragmentation (Griffiths et al, 2002;Katra et al, 2009). Remaining habitat is estimated at 5-16% of the historical distribution ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Drifting to oblivion? Rapid genetic differentiation in an endangered lizard following habitat fragmentation and drought

Vandergast

Wood

Thompson

et al. 2015

Diversity and Distributions

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Aim The frequency and severity of habitat alterations and disturbance are predicted to increase in upcoming decades, and understanding how disturbance affects population integrity is paramount for adaptive management. Although rarely is population genetic sampling conducted at multiple time points, pre‐ and post‐disturbance comparisons may provide one of the clearest methods to measure these impacts. We examined how genetic properties of the federally threatened Coachella Valley fringe‐toed lizard (Uma inornata) responded to severe drought and habitat fragmentation across its range. Location Coachella Valley, California, USA. Methods We used 11 microsatellites to examine population genetic structure and diversity in 1996 and 2008, before and after a historic drought. We used Bayesian assignment methods and F‐statistics to estimate genetic structure. We compared allelic richness across years to measure loss of genetic diversity and employed approximate Bayesian computing methods and heterozygote excess tests to explore the recent demographic history of populations. Finally, we compared effective population size across years and to abundance estimates to determine whether diversity remained low despite post‐drought recovery. Results Genetic structure increased between sampling periods, likely as a result of population declines during the historic drought of the late 1990s–early 2000s, and habitat loss and fragmentation that precluded post‐drought genetic rescue. Simulations supported recent demographic declines in 3 of 4 main preserves, and in one preserve, we detected significant loss of allelic richness. Effective population sizes were generally low across the range, with estimates ≤100 in most sites. Main conclusions Fragmentation and drought appear to have acted synergistically to induce genetic change over a short time frame. Progressive deterioration of connectivity, low Ne and measurable loss of genetic diversity suggest that conservation efforts have not maintained the genetic integrity of this species. Genetic sampling over time can help evaluate population trends to guide management.

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“…Spectral linear deconvolution of ASTER TIR emissivity data has been used to map surface compositions at Meteor Crater, Arizona (Wright and Ramsey, 2006;Ramsey, 2002), changes in playa mineralogy at Soda Playa, California (Katra and Lancaster, 2008), and eolian sands in northern Coachella Valley, California (Katra et al, 2009). Most geologic mapping studies using ASTER data have been limited to a few scenes.…”

Section: Luismentioning

confidence: 99%

Eolian dynamics and sediment mixing in the Gran Desierto, Mexico, determined from thermal infrared spectroscopy and remote-sensing data

Scheidt

Lancaster

Ramsey

2011

Geological Society of America Bulletin

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Changes in active eolian sand at northern Coachella Valley, California

Cited by 14 publications

References 28 publications

Interpretations and common challenges of aeolian records from North American dune fields

Interpretations and common challenges of aeolian records from North American dune fields

Drifting to oblivion? Rapid genetic differentiation in an endangered lizard following habitat fragmentation and drought

Eolian dynamics and sediment mixing in the Gran Desierto, Mexico, determined from thermal infrared spectroscopy and remote-sensing data

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