Persistence and local extinctions of endangered lizardUma inornataon isolated habitat patches

Barrows, Cameron W.; Allen, Michael F.

doi:10.3354/esr003061

Cited by 10 publications

(9 citation statements)

References 23 publications

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“…; Table ), which included six sites sampled in 1996 and one site not previously sampled. No lizards were found in 2008 at North Thousand Palms Preserve and East Indio Hills, consistent with annual surveys indicating they were extirpated (Barrows & Allen, ). Because 2008 sampling occurred over several days at most sites, we marked lizards to prevent resampling.…”

Section: Methodssupporting

confidence: 69%

“…1; Table 1; Hedtke et al, 2007) and collected tissue samples (tail tips or toe clips) in 2008 at seven sites ( Fig. 1 Indio Hills, consistent with annual surveys indicating they were extirpated (Barrows & Allen, 2007). Because 2008 sampling occurred over several days at most sites, we marked lizards to prevent resampling.…”

Section: Species and Sample Informationmentioning

confidence: 87%

“…One possible concern with restoring connectivity among subdivided populations is disruption of local adaptation (Kawecki & Ebert, 2004). This may be relevant in the Coachella Valley where an east-west climate gradient has been shown to impact occupancy across the valley (Barrows & Allen, 2007). Local adaptation will be important to investigate in U. inornata.…”

Section: N E and Conservation Implicationsmentioning

confidence: 99%

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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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Section: Methodssupporting

confidence: 69%

Section: Species and Sample Informationmentioning

confidence: 87%

Section: N E and Conservation Implicationsmentioning

confidence: 99%

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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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“…Greater availability of such resources might decrease the need to disperse long distances. Barrows & Allen (2007) observed that the variables that affected the occurrence of the endangered lizard Uma inornata and its persistence in habitat fragments include patch size and the distance between additional habitat patches, the number of habitat patches, and habitat quality.…”

Section: Discussionmentioning

confidence: 99%

“…The construction of wooden walkways can also enable opportunistic species of fauna and flora to penetrate the area (Carretero, 1999). Several studies (Barrows & Allen, 2007;Kacoliris et al, 2010;Stellatelli et al, 2013aStellatelli et al, , 2013b show the negative effect of exotic plants and vegetation changes on the habitat of different lizard species.…”

Section: Introductionmentioning

confidence: 99%

Walkway on coastal dunes negatively affects mobility of the spiny–footed lizard Acanthodactylus erythrurus

Carpio¹,

Figueras²,

Tortosa³

2017

Anim. Biodiv. Conserv.

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A Phylogenetic Approach to Conservation: Biodiversity and Ecosystem Functioning for a Changing Globe

Allen

Mishler²

2022

Speciesism in Biology and Culture

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As late as the sixteenth century, the world was a matrix of primarily wildlands. But due to technology development and population growth, humans increasingly altered natural habitats and modified other organisms to suit our needs. The world became “all about people”—the rest of the natural world became enslaved to us. By the eighteenth and nineteenth centuries, calls emerged for conservation and the new field of ecology developed, resulting in legislation to form national parks and save endangered species (e.g., the Endangered Species Act in the US). This “one species at a time” approach can be credited with saving a number of individual taxa, but is insufficient to deal with the modern global biodiversity crisis given the urgent pressures on remaining natural lands. We argue that considerable expansion is needed in conservation biology, moving from the single species approach to an area based approach incorporating all species and a broad phylogenetic definition of biodiversity. Biodiversity should not be considered as just the arbitrary level at which species are named—instead it is the whole tree of life. We discuss newly developed approaches to multiple species habitat conservation plans and new spatial phylogenetic methods that take into account all levels in the tree of life when making conservation decisions. To protect biodiversity, we must use all the tools we have to identify and protect landscapes that allow for future dynamics, while considering the conditions of the past and present.

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Persistence and local extinctions of endangered lizardUma inornataon isolated habitat patches

Cited by 10 publications

References 23 publications

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

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

Walkway on coastal dunes negatively affects mobility of the spiny–footed lizard Acanthodactylus erythrurus

A Phylogenetic Approach to Conservation: Biodiversity and Ecosystem Functioning for a Changing Globe

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