Cryptic divergence and revised species taxonomy within the Great Basin pocket mouse,<i>Perognathus parvus</i>(Peale, 1848), species group

Riddle, Brett R.; Jezkova, Tereza; Eckstut, Mallory E.; Oláh-Hemmings, Viktória; Carraway, Leslie N.

doi:10.1644/12-mamm-a-252

Cited by 16 publications

(15 citation statements)

References 39 publications

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“…Phylogeographic research on species occupying the arid inter-mountain region is less common. In the Great Basin pocketmouse, a species with a range that overlaps with that of C. pulchella , a north-south split in genetic structure was detected in approximately the same location as in our results (Riddle et al, 2014). It is possible that the Columbia Basin (or some geographic feature within it) represents a barrier to gene flow, either past or ongoing, for a variety of taxa that occupy the dry intermountain region.…”

Section: Discussionsupporting

confidence: 87%

Genetic differentiation is determined by geographic distance inClarkia pulchella

Bontrager

Angert

2018

Preprint

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1Both environmental differences and geographic distances may contribute to the genetic differentiation of 2 populations on the landscape. Understanding the relative importance of these drivers is of particular inter-3 est in the context of geographic range limits, as both swamping gene flow and lack of genetic diversity are 4 hypothesized causes of range limits. We investigated the landscape genetic structure of 32 populations of the 5 annual wildflower Clarkia pulchella from across the species' geographic range in the interior Pacific North-6 west. We tested whether climatic differences between populations influenced the magnitude of their genetic 7 differentiation. We also investigated patterns of population structure and geographic gradients in genetic 8 diversity. Contrary to our expectations, we found an increase in genetic diversity near the species' northern 9 range edge. We found no notable contribution of climatic differences to genetic differentiation, indicating 10 that any processes that might operate to differentiate populations based on temperature or precipitation 11 are not affecting the putatively neutral loci in these analyses. Rather, these results support seed and pollen 12 movement at limited distances relative to the species' range and that this movement and the subsequent 13 incorporation of immigrants into the local gene pool are not influenced by temperature or precipitation 14 similarities among populations. We found that populations in the northern and southern parts of the range 15 tended to belong to distinct genetic groups and that central and eastern populations were admixed between 16 these two groups. This pattern could be the result of a past or current geographic barrier associated with 17 the Columbia Plateau, or it could be the result of spread from separate sets of refugia after the last glacial 18 maximum. 19

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Section: Discussionsupporting

confidence: 87%

Genetic differentiation is determined by geographic distance inClarkia pulchella

Bontrager

Angert

2018

Preprint

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“…Deep branching events among genus-level clades of heteromyids (kangaroo rats and pocket mice) occurred during the middle Miocene [15], when rodent diversity peaked across the active region. Phylogeographic analysis of the Great Basin pocket mouse, Perognathus parvus , has revealed cryptic species whose distributions indicate late Miocene separation of populations by montane barriers in eastern Oregon and the Snake River in southern Idaho [51]. Among chipmunks (Sciuridae), distinct phylogeographic lineages in the yellow-pine chipmunk, Tamias amoenus , with divergence ages estimated at several million years or more, occupy different mountain ranges in the Pacific Northwest and northern Rocky Mountains [52].…”

Section: North American Rodents and Landscape Historymentioning

confidence: 99%

“…Connecting diversification processes to phenotypic divergence and adaptive evolution in association with landscape history requires data from modern and fossil biotas [51,87]. Linking patterns of functional diversity and species diversity in tectonic, climatic, phylogenetic, and community contexts should reveal how landscape history influences adaptive and nonadaptive radiations [40].…”

Section: Figurementioning

confidence: 99%

Biodiversity and Topographic Complexity: Modern and Geohistorical Perspectives

Badgley

Smiley

Terry

et al. 2017

Trends in Ecology & Evolution

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Topographically complex regions on land and in the oceans feature hotspots of biodiversity that reflect geological influences on ecological and evolutionary processes. Over geologic time, topographic diversity gradients wax and wane over millions of years, tracking tectonic or climatic history. Topographic diversity gradients from the present day and the past can result from the generation of species by vicariance or from the accumulation of species from dispersal into a region with strong environmental gradients. Biological and geological approaches must be integrated to test alternative models of diversification along topographic gradients. Reciprocal illumination among phylogenetic, phylogeographic, ecological, paleontological, tectonic, and climatic perspectives is an emerging frontier of biogeographic research.

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“…We used the combined median latitude of all sites surveyed (39.5°) as the benchmark for calculations and followed the methods in Terry et al (2011). Latitudinal range limits were obtained from PanTHERIA (Jones et al 2009) except for three species for which occurrence records from VertNet (< www.vertnet.org >) were used to incorporate substantial updates in taxonomy (Perognathus mollipilosus; Riddle et al 2014) or distribution (Sorex tenellus and S. preblei; Rickart et al 2004, Shohfi et al 2006). Functional trait designations were used to assess the causal mechanisms associated with pairwise associations (Fig.…”

Section: Functional Traitsmentioning

confidence: 99%

A trait‐based framework for discerning drivers of species co‐occurrence across heterogeneous landscapes

2018

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Null model analysis of species co‐occurrence patterns has long been used to gain insight into community assembly but is often limited to identifying non‐random patterns without providing clarity about underlying ecological mechanisms. This challenge is especially apparent when sampling units are spread across a heterogeneous landscape or along an environmental gradient because multiple mechanisms can produce similar co‐occurrence patterns. We developed a trait‐based approach for discriminating between environmental filtering and biotic interactions as the probable driver of co‐occurrence patterns across environmentally heterogeneous sites. We demonstrate our framework by analyzing the co‐occurrence of small mammals over elevation in three independent mountain ranges in the Great Basin of the western United States. Our sampling design accounts for landscape scale environmental variability and within‐site habitat heterogeneity. We identified 52 non‐random species pairs, of which 36 were aggregated and 16 were segregated. For each pair, we determined which mechanism was the likely ecological explanation using a hypothesis‐testing framework based on functional trait similarity. Expectations of biotic interactions were based on similarity of diet and body size whereas habitat affinity and geographic range were used for environmental filtering. Only four pairs were consistent with expectations under biotic interactions, including pairs for which competitive exclusion has previously been documented. In addition to analyzing individual pairs, we used binomial tests of observed versus expected totals of intra‐ and inter‐guild pairs to determine assemblage‐wide deviations from random community structure. Signatures of environmental filtering were consistent across mountain ranges and scales. Despite differences in species composition and significant pairs among data sets, our approach revealed consistent mechanistic conclusions, emphasizing the value of trait‐based methods to co‐occurrence and community assembly.

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Cryptic divergence and revised species taxonomy within the Great Basin pocket mouse,Perognathus parvus(Peale, 1848), species group

Cited by 16 publications

References 39 publications

Genetic differentiation is determined by geographic distance inClarkia pulchella

Genetic differentiation is determined by geographic distance inClarkia pulchella

Biodiversity and Topographic Complexity: Modern and Geohistorical Perspectives

A trait‐based framework for discerning drivers of species co‐occurrence across heterogeneous landscapes

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