Diversification of the Perognathus flavus species group in emerging arid grasslands of western North America

Neiswenter, Sean A.; Riddle, Brett R.

doi:10.1644/09-mamm-a-102.1

Cited by 41 publications

(25 citation statements)

References 71 publications

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“…The timing of diversification and habitat use (Manning and Jones 1988;Monk and Jones 1996;Williams 1978b) of the species in the fasciatus species group is consistent with an hypothesis outlined for the flavus species group (Neiswenter and Riddle 2010), which is codistributed with the fasciatus species group across parts of the Colorado Plateau, northern Chihuahuan Desert, and Great Plains (Fig. 2).…”

Section: Discussionsupporting

confidence: 79%

“…Species designation was not an objective of this study, and we acknowledge that a more detailed analysis of clade boundaries with the inclusion of all recognized subspecies is necessary to evaluate fully the specific status of members in this group. However, several studies have shown that current taxonomy (largely based on skeletal morphology) grossly underestimates the molecular diversity within the genus Perognathus (Alexander and Riddle 2005;McKnight 2005;Neiswenter and Riddle 2010). Species of Perognathus exhibit extensive plasticity in external morphology that can be causally or directly linked to environmental conditions experienced by the individual.…”

Section: Discussionmentioning

confidence: 99%

“…This pattern could be more widespread within the genus Perognathus than previously recognized, being apparent in different species and in different supposed transition zones. For example, across the same region P. flavus and P. merriami previously were thought to hybridize (based on intermediate morphology) through P. m. gilvus (Wilson 1973) but probably coexist as separate species that are morphologically similar, based on levels of molecular divergence (Brant and Lee 2006;Neiswenter and Riddle 2010). Additionally, Osgood (1900) believed that P. callistus (currently synonymized with P. fasciatus) from the Wyoming Basin was intermediate between P. fasciatus and P. apache, resembling P. apache from the Uinta Basin in skull characteristics (presumably due to intermediate climate) but similar in color to P. fasciatus from the Great Plains.…”

Section: Discussionmentioning

confidence: 99%

“…2), which provides rationale for developing a hypothesis for divergence within the fasciatus species group. First, we postulate that basal species group divergence began in the late Miocene coincident with the initial rapid spread of arid grasslands (Retallack 2001) and associated biota (Neiswenter and Riddle 2010). Second, we hypothesize a later bout of diversification as lineages comprising separate geographic Hoffmeister (1986).…”

mentioning

confidence: 87%

“…This hypothesis portrays a deeper history of geographic evolution in western North American arid lands, with diversification of species groups rooted in the late Miocene and species diversification continuing through the Pliocene and the Pleistocene (Hafner et al 2007;Jezkova et al 2009;McKnight 2005;Riddle et al 2000aRiddle et al , 2000bRiddle et al , 2000c. A study of particular relevance to developing plausible hypotheses for geographic evolution of the fasciatus species group traced geographic evolution of the flavus species group using molecular clock analyses with both mitochondrial and nuclear data (Neiswenter and Riddle 2010). That study proposed a causal association between the diversification of basal lineages within the flavus species group and the initial development and expansion of arid grasslands.…”

mentioning

confidence: 99%

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Landscape and climatic effects on the evolutionary diversification of the Perognathus fasciatus species group

Neiswenter¹,

Riddle²

2011

Journal of Mammalogy

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We evaluated evolutionary relationships of taxa within silky pocket mice of the Perognathus fasciatus species group, composed of 3 species, P. fasciatus, P. flavescens, and P. apache. These species are distributed throughout the Great Plains, Wyoming Basin, Colorado Plateau, and northern Chihuahuan Desert biogeographic regions in North America. We tested a previously postulated hypothesis of Pleistocene species divergence and introgression by analyzing mitochondrial DNA (mtDNA) and amplified fragment length polymorphisms (AFLPs). Both mtDNA and AFLP data support several genetic lineages in the fasciatus species group that are geographically structured. Molecular clock estimates reject a Pleistocene speciation hypothesis in favor of a deeper, more complex evolutionary history of initial divergence in the Miocene followed by secondary diversification beginning in the middle Pliocene and progressing through the Pleistocene. Results support recognition of an additional species within the group. Temporal and spatial congruence between the mtDNA clades in the fasciatus species group and other codistributed species of Perognathus appear to support a hypothesis of concerted diversification throughout the Chihuahuan Desert, Colorado Plateau, and Great Plains.

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Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 87%

mentioning

confidence: 99%

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Landscape and climatic effects on the evolutionary diversification of the Perognathus fasciatus species group

Neiswenter¹,

Riddle²

2011

Journal of Mammalogy

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Population genetic structure of a Chihuahuan Desert endemic mammal, the desert pocket gopher,Geomys arenarius

Pfau,

Kozora,

Gatica‐Colima

et al. 2023

Ecology and Evolution

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The biogeographic history of the Chihuahuan Desert is complex, driven by numerous physiographic events and climatic changes. This dynamic history would have influenced the flora and fauna of the region including the desert pocket gopher, Geomys arenarius, a subterranean rodent endemic to the northern Chihuahuan Desert. G. arenarius is restricted to sandy soils and are considered to have a disjunct distribution. Two subspecies are recognized: G. a. arenarius and G. a. brevirostris. We used multilocus nuclear (amplified fragment length polymorphisms) and mitochondrial DNA (ND2) sequence data to uncover patterns of genetic diversity within and among populations of G. arenarius. We evaluated correspondence of genetic patterns to traditionally accepted subspecies boundaries, mapped the distribution of potentially suitable soils to identify barriers or corridors to dispersal and to guide future survey efforts, provided evidence that could be used to recognize distinct population segments, and quantified genetic diversity within populations. Both datasets were largely concordant and demonstrated hierarchical patterns of genetic divergence. The greatest divergence was consistent with the two recognized subspecies. Mapping of potentially habitable soils revealed likely barriers to dispersal contributing to the allopatric pattern of geographic distribution and areas, which may be occupied by G. arenarius but not yet documented. Because G. arenarius is restricted to soils with high sand content, and these habitable soils are disjunct within the region occupied by this species, historical factors that impacted soil deposition and deflation likely contributed to the observed patterns of genetic divergence. Genetic diversity was higher within populations of the southern subspecies (G. a. arenarius) compared to G. a. brevirostris. This may be due to a greater availability of continuous suitable soils within the range of G. a. arenarius or higher density due to greater food availability (currently or historically)—both of which could allow for a higher effective population size.

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Biogeographic consequences of shifting climate for the western massasauga (Sistrurus tergeminus)

Walkup¹,

Lawing

Hibbitts

et al. 2022

Ecology and Evolution

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The western massasauga (Sistrurus tergeminus) is a small pit viper with an extensive geographic range, yet observations of this species are relatively rare. They persist in patchy and isolated populations, threatened by habitat destruction and fragmentation, mortality from vehicle collisions, and deliberate extermination. Changing climates may pose an additional stressor on the survival of isolated populations. Here, we evaluate historic, modern, and future geographic projections of suitable climate for S. tergeminus to outline shifts in their potential geographic distribution and inform current and future management. We used maximum entropy modeling to build multiple models of the potential geographic distribution of S. tergeminus. We evaluated the influence of five key decisions made during the modeling process on the resulting geographic projections of the potential distribution, allowing us to identify areas of model robustness and uncertainty. We evaluated models with the area under the receiver operating curve and true skill statistic. We retained 16 models to project both in the past and future multiple general circulation models. At the last glacial maximum, the potential geographic distribution associated with S. tergeminus occurrences had a stronghold in the southern part of its current range and extended further south into Mexico, but by the mid‐Holocene, its modeled potential distribution was similar to its present‐day potential distribution. Under future model projections, the potential distribution of S. tergeminus moves north, with the strongest northward trends predicted under a climate scenario increase of 8.5 W/m2. Some southern populations of S. tergeminus have likely already been extirpated and will continue to be threatened by shifting availability of suitable climate, as they are already under threat from desertification of grasslands. Land use and habitat loss at the northern edge of the species range are likely to make it challenging for this species to track suitable climates northward over time.

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Diversification of the Perognathus flavus species group in emerging arid grasslands of western North America

Cited by 41 publications

References 71 publications

Landscape and climatic effects on the evolutionary diversification of the Perognathus fasciatus species group

Landscape and climatic effects on the evolutionary diversification of the Perognathus fasciatus species group

Population genetic structure of a Chihuahuan Desert endemic mammal, the desert pocket gopher,Geomys arenarius

Biogeographic consequences of shifting climate for the western massasauga (Sistrurus tergeminus)

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