Mitochondrial DNA and other lines of evidence clarify species diversity in the <i>Peromyscus truei</i> species group (Cricetidae: Neotominae)

Hernández-Canchola, Giovani; León‐Paniagua, Livia; Esselstyn, Jacob A.

doi:10.1515/mammalia-2021-0146

Cited by 2 publications

(1 citation statement)

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“…Since the time of data collection and initial analysis, newer versions of the MDD have been published. Whereas the newer MDD v1.9 recognizes an additional 96 extant species globally, of which approximately 27 have Neotropical and/or Nearctic ranges (Mammal Diversity Database 2022), these tend to be cryptic species based on gene sequence divergences among populations previously assigned to recognized species (e.g., Peromyscus amplus ; Hernández-Canchola et al 2022). Because reliable geographic ranges for many newer species are not available, we used the MDD v1.0 data set in which all species have published geographic ranges.…”

Section: Methodsmentioning

confidence: 99%

Deconstructing the latitudinal diversity gradient of North American mammals by nominal order

Meltesen,

Whiting,

Pinto-Ledezma

et al. 2023

Journal of Mammalogy

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North American mammals follow a well-established latitudinal diversity gradient in species richness. However, the degree to which species in different mammal clades follow the same latitudinal gradient—and to which each clade contributes to the pattern observed for all mammals remains unknown. Here, we separate the overall mammalian latitudinal diversity gradient by mammal orders and investigate the impact of climate and topography on the distribution of each major mammal clade. We joined an equal-area grid (100 × 100 km cells) of continental North America embedded with environmental variables (n = 10) with mammalian species ranges (n = 753). We used spatial regression models to quantify the relationship between species richness and latitude for all mammals, all mammals excluding select clades, and for each individual subordinate clade (n = 9). We used multiple linear regression and simultaneous autoregressive regression models to determine which environmental variables best explained patterns of species richness for each mammal order. Whereas North American mammals altogether exhibit a strong latitudinal diversity gradient in species richness, most orders deviate from the species richness pattern observed for all mammals and their gradients are weak or entirely absent. Bats (Chiroptera) exhibit the strongest latitudinal gradient—their removal from the pattern for all mammals substantially weakens the total mammalian gradient, more so than when rodents are removed. Environmental variables explain patterns of species richness well for some clades, but poorly for others. The gradient we observe for North American mammals today is likely a combined product of multiple diversification events, dispersals, and climatic and tectonic histories.

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Section: Methodsmentioning

confidence: 99%