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A Preliminary Study on the Amphibian Community Structure in South Sudan (East Africa)

Gift Simon Demaya, Mapour Kuot Mungu, Daniele Dendi, Massimiliano Di Vittorio, Luca Luiselli

Abstract


The structure of amphibian communities in South Sudan (East Africa) has never been studied so far. In this paper, the community composition and the diversity patterns of amphibians in nine study sites and in four different habitat types in Jubek area of South Sudan, are analyzed. In addition, the effects of habitat types on the abundance patterns of each species are also explored by Generalized Linear Models. Both pitfall traps with drift fences and Active Search Visual encounter survey were used for the sampling of the amphibians. A total of 551 individuals from 14 species, and belonging to 9 different families, were recorded during the present study, with two ranid and one Ptychadenidae species dominating the sample (i.e., Phrynobatrachus natalensis, Hoplobatrachus occipitalis, Ptychadena nilotica). The arthroleptid Leptopelis bocagii was reported for the first time in South Sudan. Despite an identical field effort among habitats, there was a statistically uneven number of individuals by habitat, with significantly higher-than-expected individuals found in wetlands/swamps and in farmlands. Farmlands had higher values for Shannon – Wiener and Evenness was much higher in stream and in farmlands than in any other habitats. Our study revealed a relatively low diversity of amphibian species across sites and habitats. For instance, whereas in our study we found a range of 2 – 13 species per locality and 4 – 11 species per habitat type, whereas there were up to 24 – 29 species per site in Uganda.

Keywords


Anura; Generalized Linear Model; East Africa; Ecology

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References


Behangana M. and Arusi J. (2004). «The distribution and diversity of amphibian fauna of Lake Nabugabo and surrounding areas», Afr. J. Ecol., 42(Suppl 1), 6 – 13.

Behangana M., Kasoma P., and Luiselli L. (2009), «Ecological correlates of species richness and population abundance patterns in the amphibian communities from the Albertine Rift, East Africa», Biodiv. Conserv., 18, 2855 – 2873.

Behangana M. and Luiselli L. (2008), «Habitat niche community-level analysis of an amphibian assemblage at Lake Nabugabo, Uganda», Web Ecol., 8, 125 – 134.

Channing A. and Howell K. M. (2006), Amphibians of East Africa, Edition Chimaira – Comstock Publishing Associates, New York.

Drewes R. C. and Altig R. (1996), «Anuran egg predation and heterocannibalism in a breeding community of East African frogs», Tropical Zool., 9, 333 – 347.

Gardner T. A., Fitzherbert E. B., Drewes R. C., Howell K. M., and Caro T. (2007), «Spatial and temporal patterns of abundance and diversity of an East African leaf litter amphibian fauna», Biotropica, 39, 105 – 113.

Gower D. J., Aberra R. K., Schwaller S., Largen M. J., Collen B., Spawls S., Menegon M., Zimkus B. M., de Sá R., Mengistu A. A., Gebresenbet F., Moore R. D., Saber S. A., and Loader S. P. (2013). «Long-term data for endemic frog genera reveal potential conservation crisis in the Bale Mountains, Ethiopia», Oryx, 47, 59 – 69.

Hammer O. (2012), PAST — Paleontological Statistics. Version 2.17. Reference Manual 1999 – 2012, PAST, Oslo.

Hardy L. M. and Crnkovic A. C. (2006), «Diet of amphibians and reptiles from the Engare Ondare River Region of central Kenya, during the dry season», Afr. J. Herpetol., 55, 143 – 159.

Harper D. A. T. (ed.) (1999), Numerical Palaeobiology, John Wiley and Sons, New York.

Hinde R., Corti G., Fanning E., and Jenkins R. K. (2001), «Anurans in the Kilombero Valley, Tanzania: comparison between miombo woodland, evergreen forest and teak plantations», Afr. J. Herpetol., 50, 35 – 39.

Hosmer D. W. and Lemeshow S. (2000), Applied Logistic Regression Analysis. 2nd Edition, John Wiley and Sons, New York.

IUCN (2018), The IUCN Red List of Threatened Species, www.iucnredlist.org.

IUCN/SSC Amphibian Specialist Group (2014), «Phrynobatrachus mababiensis», in: The IUCN Red List of Threatened Species 2014, e.T58124A3065552. http://dx.doi.org/ 10.2305/IUCN.UK.2014-3.RLTS.T58124A3065552.en.

Loader S. P., Ceccarelli S. F., Menegon M., Howell K. M., Kassahun R., Mengistu A. A., Saber S. A., Gebresenbet F., de Sá R., Davenport T. R. B., Larson J. B., Müller H., Wilkinson M., Gower D. J., and Larson J. G. (2014), «Persistence and stability of Eastern Afromontane forests: evidence from brevicipitid frogs», J. Biogeogr., 41, 1781 – 1792.

Loveridge A. (1930), «A list of the Amphibia of the British territories in East Africa (Uganda, Kenya Colony, Tanganyika Territory, and Zanzibar), together with keys for the diagnosis of the species», Proc. Zool. Soc. Lond., 1930, 7 – 32.

Loveridge A. (1935), «Scientific results of an expedition to rain forest regions in Eastern Africa, I. New reptiles and amphibians from East Africa», Bull. Mus. Compar. Zool., 79, 1 – 19.

Magurran A. E. (1988), Ecological Diversity and Its Measurement, Princeton Univ. Press, Princeton, NJ.

Malonza P. K., Lötters S., and Measey G. J. (2010), «The montane forest associated amphibian species of the Taita Hills, Kenya», J. E. Afr. Nat. Hist., 99, 47 – 63.

Malonza P. K. and Veith M. (2012), «Amphibian community along elevational and habitat disturbance gradients in the Taita Hills, Kenya», Herpetotropicos, 7(1 – 2), 7 – 16.

McCullagh P. and Nelder J. A. (1989), Generalized Linear Models, Chapman and Hall/CRC, London, UK.

Pickersgill M. (2007), Frog Search: Results and Expeditions to Southern and Eastern Africa, Edition Chimaira, Frankfurt am Main.

Poynton J. C. (1999), «Distribution of amphibians in sub-Saharan Africa, Madagascar, and Seychelles», in: Patterns of Distribution of Amphibians, a Global Perspective, Johns Hopkins Univ. Press, Baltimore, pp. 483 – 539.

Razzetti E. and Msuya C. A. (2002), Field Guide to the Amphibians and Reptiles of Arusha National Park (Tanzania), Negri, Varese.

Rödel M. O. (2000), Herpetofauna of West Africa. Vol. I. Amphibians of the West African Savanna, Edition Chimaira, Frankfurt, Germany.

Schiøtz A. (1964), «A preliminary list of amphibians collected in Ghana,« Vedenskab. Meddel. Dansk Naturhist. Forening, 127, 1 – 17.

Sinsch U., Greenbaum E., Kusamba C., and Lehr E. (2011), «Rapid assessment of montane anuran communities in the Albertine Rift: Hyperolius castaneus Ahl, 1931 as an umbrella species for conservation», Afr. Zool., 46, 320 – 333.

Sinsch U., Lümkemann K., Rosar K., Schwarz C., and Dehling M. (2012), «Acoustic niche partitioning in an anuran community inhabiting an Afromontane wetland (Butare, Rwanda)», Afr. Zool., 47, 60 – 73.

Spawls S., Howell K. M., and Drewes R. C. (2006), Reptiles and Amphibians of East Africa, Princeton Univ. Press, Princeton, NJ.

Vignoli L., Pau F., Luiselli L., and Carpaneto G. M. (2010), «Co-occurrence patterns of five species of anurans at a pond network in Victoria Lake, Kenya», Afr. J. Ecol., 48, 275 – 279.

Vonesh J. R. (1998), The Amphibians and Reptiles of Kibale Forest, Uganda: Herpetofaunal Survey and Ecological Study of the Forest Floor Litter Community. Doctoral Dissertation, State University System of Florida.

Vonesh J. R. (2001). «Natural history and biogeography of the amphibians and reptiles of Kibale National Park, Uganda», Contemp. Herpetol., 4, 1 – 14.




DOI: http://dx.doi.org/10.30906/1026-2296-2019-26-%25s-225-234

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