EurekaMag.com logo
+ Site Statistics
References:
48,252,460
Abstracts:
22,798,453
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Evidence of environmental niche differentiation in the striped mouse (Rhabdomys sp.): inference from its current distribution in southern Africa


, : Evidence of environmental niche differentiation in the striped mouse (Rhabdomys sp.): inference from its current distribution in southern Africa. Ecology and Evolution 2(5): 1008-1023

The aim of this study was to characterize environmental differentiation of lineages within Rhabdomys and provide hypotheses regarding potential areas of contact between them in the Southern African subregion, including the Republic of South Africa, Lesotho, and Namibia. Records of Rhabdomys taxa across the study region were compiled and georeferenced from the literature, museum records, and field expeditions. Presence records were summarized within a 10 × 10 km grid covering the study area. Environmental information regarding climate, topography, land use, and vegetation productivity was gathered at the same resolution. Multivariate statistics were used to characterize the current environmental niche and distribution of the whole genus as well as of three mitochondrial lineages known to occur in southern Africa. Distribution modeling was carried out using MAXENT in order to generate hypotheses regarding current distribution of each taxa and their potential contact zones. Results indicate that the two species within Rhabdomys appear to have differentiated across the precipitation/temperature gradient present in the region from east to west. R. dilectus occupies the wettest areas in eastern southern Africa, while R. pumilio occupies the warmer and drier regions in the west, but also penetrates in the more mesic central part of the region. We provide further evidence of environmental differentiation within two lineages of R. dilectus. Contact zones between lineages appear to occur in areas of strong environmental gradients and topographic complexity, such as the transition zones between major biomes and the escarpment area where a sharp altitudinal gradient separates coastal and plateau areas, but also within more homogeneous areas such as within grassland and savannah biomes. Our results indicate that Rhabdomys may be more specialized than previously thought when considering current knowledge regarding mitochondrial lineages. The genus appears to have differentiated along two major environmental axes in the study region, but results also suggest dispersal limitations and biological interactions having a role in limiting current distribution boundaries. Furthermore, the projection of the potential geographic distribution of the different lineages suggests several contact zones that may be interesting study fields for understanding the interplay between ecological and evolutionary processes during speciation.

(PDF same-day service: $19.90)

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 037419730

PMID: 22837845

DOI: 10.1002/ece3.219

PDF Full Text: Submit


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

Sakurai, H., 1968: Physiological studies on the digestion of Coccinellid beetles (Coleoptera : Coccinellidae), with special reference to their food habits. The following is substantially the author's summary. Comparative studies were made in Japan on the physiology of digestion of entomophagous Coccinellids (adults of Coccinella septempunctata subsp. brucki Muls., Harmonia axyridis (Pall), Chilo...

Kobal, G., 1992: Olfactory event-related potentials State-of-art opportunities and needs. Chemical Senses 17(5): 652-653

Menz, E. T.; Josephson, L., 1997: Hepatocyte-specific receptor-mediated endocytosis-type compositions. Official Gazette of the United States Patent & Trademark Office Patents 1203(3): 2116, Oct 21

Lowe, D. P., 1982: Check list and host index of bacteria, fungi and mistletoes of British Columbia. A collection of updated replacement sheets for the previously revised edition.

Schonherr, S., 1972: Veterinary periodicals and their limitations in their field. Tierarztliche Umschau: 27 (11) 535-538

Bahrenfus, J. B.; Fehr, W. R., 1984: Registration of Lakota soybean. Lakota was derived from an F6 plant from population AP6 (originally obtained by intermating 40 high-yielding lines of maturity groups 0-IV) which had been subjected to one cycle of recurrent selection for increased seed yield. It is of group I mat...

Brandon S., 1986: Management of depression in general practice. British Medical Journal 292(6516): 287-289

Gruneklee, H. G., 1965: Revegetation of wasteland in the Ruhr conurbation. A report on a scheme inaugurated in 1952 which provides planting stock and subsidies for the revegetation or improvement of: slag heaps, roadsides, railway embankments, canal banks, rubbish dumps, wasteland, and neglected woodland. Discusses site...

Macpherson, Enrique, 1999: Three new species of the genus Munida Leach, 1820 from the Seychelles Islands. Three new species of the genus Munida Leach, 1820 (M. insularis, M. dissita and M. nesiotes), are described and illustrated from specimens collected during the cruise Cepros carried out off Seychelles Islands. M. insularis closely resembles M. ecl...

Gaspar, Frida C., 1945: The Argentine species of the genus Chuquiraga. This exclusively S. American genus is reprented in Argentina by 17 spp. and by various spp. in Peru, Bolivia, and Chile. The spp. of Argentina are described, illustrated and their range is given. A key is included.