Faunal nestedness and species–area relationship for small non-volant mammals in “sky islands” of northern Venezuela

Anderson, Robert P.; Gutiérrez, Eliécer E.; Ochoa-G, José; García, Franger J.; Aguilera, Marisol

doi:10.1080/01650521.2012.745295

Cited by 19 publications

(29 citation statements)

References 36 publications

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“…; Anderson et al ). The distributional ranges of these species do not broadly overlap, with only 1 narrow contact zone documented to date: on the Península de Paraguaná at the base of Cerro Santa Ana and its immediately surrounding lowlands (ca 80–120 m; Anderson et al ; see also Bisbal‐E. ; Supplementary material Appendix 1).…”

Section: Methodsmentioning

confidence: 97%

“…; Supplementary material Appendix 1). Furthermore, it inhabits mesic habitat in the tiny, isolated Cerro Santa Ana, on the Península de Paraguaná in northern Venezuela, where a gradient of thorn, deciduous, evergreen, and cloud forests occurs at low elevations (120–700 m; Anderson et al ). The distribution of M. xerophila is restricted to xeric shrublands in the lowlands of northeastern Colombia and northwestern Venezuela, at elevations from sea level to ca 350 m (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…The distribution of M. xerophila is restricted to xeric shrublands in the lowlands of northeastern Colombia and northwestern Venezuela, at elevations from sea level to ca 350 m (Fig. ; Anderson et al ). The distributional ranges of these species do not broadly overlap, with only 1 narrow contact zone documented to date: on the Península de Paraguaná at the base of Cerro Santa Ana and its immediately surrounding lowlands (ca 80–120 m; Anderson et al ; see also Bisbal‐E.…”

Section: Methodsmentioning

confidence: 99%

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Can biotic interactions cause allopatry? Niche models, competition, and distributions of South American mouse opossums

2014

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Based on our own empirical data and a literature review, we explore the possibility that biotic interactions, specifically competition, might be responsible for creating, and/or maintaining, geographic isolation. Ecological niche modeling was first used to test whether the distributions of 2 species of Neotropical marsupials (Marmosa robinsoni and M. xerophila) fit the predicted geographic pattern of competitive exclusion: one species predominates in areas environmentally suitable for both species along real contact zones. Secondly, we examined the connectivity among populations of each species, interpreted in the light of the niche models. The results show predominance of M. xerophila along its contact zone with M. robinsoni in the Península de Paraguaná in northwestern Venezuela. There, M. robinsoni has an extremely restricted distribution despite climatic conditions suitable for both species across the peninsula and its isthmus. The latter two results suggest that M. xerophila may be responsible for the geographic isolation of the peninsular populations of M. robinsoni with respect to other populations of the latter species in northwestern Venezuela. These results may represent an example of allopatry caused, or at least maintained, by competition. Our results and a review of numerous studies in which biotic interactions restrict species distributions (including at the continental scale) support a previously overlooked phenomenon: biotic interactions can isolate populations of a species. We propose 2 general mechanisms, intrusion and contraction, to classify allopatric conditions caused by various classes of biotic interactions. We present a necessary modification of the concept of ecological vicariance to include biotic interactions as possible vicariant agents regardless of whether genetic differentiation occurs or not.

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Section: Methodsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Can biotic interactions cause allopatry? Niche models, competition, and distributions of South American mouse opossums

2014

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“…1). The physical characteristics and mammalian biogeography of these systems has been considered in detail in recent studies (Molinari 2007;Anderson & Gutiérrez 2009;Anderson et al 2012;QuirogaCarmona & Molinari 2012;Gutiérrez et al 2015). A succinct description of these mountain systems, and the Venezuelan political divisions (within parentheses) from which we examined specimens, are: 1) Cordillera Oriental [de Colombia], on its Venezuelan side (Táchira, SW of the Táchira Depression; Apure); 2) Sierra de Perijá (or Molecular analysis.…”

Section: Methodsmentioning

confidence: 99%

A new polytypic species of yellow-shouldered bats, genus Sturnira (Mammalia: Chiroptera: Phyllostomidae), from the Andean and coastal mountain systems of Venezuela and Colombia

Molinari¹,

Bustos²,

Burneo³

et al. 2017

Zootaxa

546

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Sturnira is the most speciose genus of New World leaf-nosed bats (Phyllostomidae). We name Sturnira adrianae, new species. This taxon is born polytypic, divided into a larger subspecies (S. a. adrianae) widespread in the mountains of northern and western Venezuela, and northern Colombia, and a smaller subspecies (S. a. caripana) endemic to the mountains of northeastern Venezuela. The new species inhabits evergreen, deciduous, and cloud forests at mainly medium (1000–2000 m) elevations. It has long been confused with S. ludovici, but it is more closely related to S. oporaphilum. It can be distinguished from other species of Sturnira by genetic data, and based on discrete and continuously varying characters. Within the genus, the new species belongs to a clade that also includes S. oporaphilum, S. ludovici, S. hondurensis, and S. burtonlimi. The larger new subspecies is the largest member of this clade. The two new subspecies are the most sexually dimorphic members of this clade. The smaller new subspecies is restricted to small mountain systems undergoing severe deforestation processes, therefore can be assigned to the Vulnerable (VU) conservation category of the International Union for Conservation of Nature (IUCN).

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“…Vegetation of distinctly montane character can extend downslope to within 100 m above sea level on such isolated peaks, which intercept moisture-laden sea breezes and are often shrouded in low-lying clouds. The cloud forest (montane rain forest) vegetation at capture localities in the Serranía de San Luis was briefly described by Anderson et al (2012). indistinct. Lacrimal foramina variable (the upper foramen is usually not visible in lateral view, but the lower foramen can be either laterally visible or concealed inside the anterior orbital margin); 7 zygomatic process of squamosal broadly overlapped dorsally by the jugal.…”

Section: Species Of the Fuscatus Groupmentioning

confidence: 99%

A Revision of the Didelphid Marsupial Genus Marmosops, Part 1. Species of the Subgenus Sciophanes

Díaz‐Nieto

Voss

2016

Bulletin of the American Museum of Natural History

986

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Faunal nestedness and species–area relationship for small non-volant mammals in “sky islands” of northern Venezuela

Cited by 19 publications

References 36 publications

Can biotic interactions cause allopatry? Niche models, competition, and distributions of South American mouse opossums

Can biotic interactions cause allopatry? Niche models, competition, and distributions of South American mouse opossums

A new polytypic species of yellow-shouldered bats, genus Sturnira (Mammalia: Chiroptera: Phyllostomidae), from the Andean and coastal mountain systems of Venezuela and Colombia

A Revision of the Didelphid Marsupial Genus Marmosops, Part 1. Species of the Subgenus Sciophanes

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