Abstract
Biological invasions are regarded as a form of global change and potential cause of biodiversity loss. Xenopus laevis is an anuran amphibian native to sub-Saharan Africa with strong invasive capacity, especially in geographic regions with a Mediterranean climate. In spite of the worldwide diffusion of X. laevis, the effective impact on local ecosystems and native amphibian populations is poorly quantified. A large population of X. laevis occurs in Sicily and our main aim of this work was to assess the consequences of introduction of this alien species on local amphibian populations. In this study we compare the occurrence of reproduction of native amphibians in ponds with and without X. laevis, and before and after the alien colonization. The results of our study shows that, when X. laevis establishes a conspicuous population in a pond system, the populations of Discoglossus pictus, Hyla intermedia and Pelophylax synklepton esculentus show clear signs of distress and the occurrence of reproduction of these native amphibians collapses. In contrast, the populations of Bufo bufo do not appear to be affected by the alien species. Since the Sicilian population of X. laevis shows a strong dispersal capacity, proportionate and quick interventions become necessary to bound the detriment to the Sicilian amphibians populations.
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References
Beebee TCJ, Griffiths RA (2005) The amphibian decline crisis: a watershed for conservation biology? Biol Conserv 125:275–281
Casterlin ME, Reynolds WW (1980) Diel activity and thermoregulatory behaviour of a fully aquatic frog: Xenopus laevis. Hydrobiologia 75:189–191
Collins JP, Storfer A (2003) Global amphibian declines: sorting the hypotheses. Divers Distrib 9:89–98
Cooney R (2004) The precautionary principle in biodiversity. Conservation and natural resource management: an issues paper for policy-makers, researchers and practitioners. IUCN, Gland Cambridge
Courchamp F, Chapuis J, Pascal M (2003) Mammal invaders on island: impact, control and control impact. Biol Rev 78:347–383
Crayon JJ (2005) Species account: Xenopus laevis. In: Lannoo MJ (ed) Amphibian declines: the conservation status of United States species, vol 2. University of California Press, Berkeley, pp 522–525
Cruz MJ, Rebelo R, Crespo G (2006) Effects of an introduced crayfish, Procambarus clarkii, on the distribution of south-western Iberian amphibians in their breeding habitats. Ecography 29:329–338
Eggert C, Foquet A (2006) A preliminary biotelemetric study of a feral invasive Xenopus laevis population in France. Alytes 23:144–149
Elepfandt A (1996a) Sensory perception and the lateral line system in the clawed frog, Xenopus. In: Tinsley RC, Kobel HR (eds) The Biology of Xenopus. Oxford University Press, Oxford, pp 97–116
Elepfandt A (1996b) Underwater acoustics and hearing in the clawed frog, Xenopus. In: Tinsley RC, Kobel HR (eds) The Biology of Xenopus. Oxford University Press, Oxford, pp 177–191
Elepfandt A, Eistetter I, Fleig A, Gunther E, Hainch M, Hepperle S, Traub B (2000) Hearing threshold and frequency discrimination in the purely aquatic frog Xenopus laevis (Pipidae): measurement by means of conditioning. J Exp Biol 203:3621–3629
Faraone FP, Lillo F, Giacalone G, Lo Valvo M (2008a) The large invasive population of Xenopus laevis in Sicily (Italy). Amphibi-Reptil 29:405–412
Faraone FP, Lillo F, Giacalone G, Lo Valvo M (2008b) Dieta di una popolazione di Xenopo liscio introdotta in Sicilia. In: Corti C. (Ed.), Herpetologia Sardiniae. Societas Herpetologica Italica—Edizioni Belvedere, “le scienze”, Latina, pp 241–246
Fouquet A (2001) Des clandestins aquatiques. Zamenis 6:10–11
Fouquet A, Measey JG (2006) Plotting the course of an African clawed frog invasion in Western France. Anim Biol 56:95–102
Garner TWJ, Perkins MW, Govindarajulu P, Seglie D, Walker S, Cunningham AA, Fisher MC (2006) The emerging amphibian pathogen Batrachochytrium dendrobatidis globally infects introduced populations of the North American bullfrog, Rana catesbeiana. Biol Lett 2:455–459
Gherardi F, Bertolino S, Bodon M, Cesellato S, Cianfanelli S, Ferraguti M, Lori E, Mura G, Nocita A, Riccardi N, Rossetti G, Rota E, Scalera R, Zerunian S, Tricarico E (2008) Animal xenodiversity in Italian inland waters: distribution, modes of arrival, and pathways. Biol Invasions 10:435–454
Gurdon J (1996) Introductory comments: Xenopus as a laboratory animal. In: Tinsley RC, Kobel HR (eds) The Biology of Xenopus. Oxford University Press, Oxford, pp 3–6
Hartel T, Szilárd N, Cogalniceanu D, Öllerer K, Moga CI, Demeter L (2007) The effect of fish and aquatic habitat complexity on amphibians. Hydrobiologia 583:173–182
Hecnar SJ, M’Closkey RT (1997) The effects of predatory fish on amphibian species richness and distribution. Biol Conserv 79:123–131
Holway DA, Lach L, Suarez AV, Tsutsui ND, Case TJ (2002) The causes and the consequences of ant invasions. Annu Rev Eco Syst 33:181–233
Ihmied YM, Taylor EW (1995) Effect of temperature on surfacing behaviour in Xenopus laevis. J Therm Biol 20:49–53
Kats LB, Ferrer RP (2003) Alien predators and amphibians decline: review of two decades of science and the transition to conservation. Divers Distrib 9:99–110
Keller RP, Lodge DM (2007) Species invasions from commerce in live aquatic organisms: problems and possible solutions. Bioscience 57:428–436
Kolar CS, Lodge DM (2001) Progress in invasion biology: predicting invaders. Trends Ecol Evol 16:199–204
Lafferty KD, Page CJ (1997) Predation on the endangered tidewater goby, Eucyclogobius newberry, by the introduced African clawed frog, Xenopus laevis, with notes on the frog’s parasites. Copeia 3:589–592
Lanza B, Andreone F, Bologna M, Corti C, Razzetti E (2007) Fauna d’Italia Vol XLII, Amphibia. Calderini, Bologna
Lillo F, Marrone F, Sicilia A, Castelli G, Zava B (2005) An invasive population of Xenopus laevis (Daudin, 1802) in Italy. Herpetozooa 18:63–64
Lobos G, Jaksic FM (2005) The ongoing invasion of the African clawed frog (Xenopus laevis) in Chile, causes of concern. Biodivers Conserv 14:429–439
Lobos G, Measey GJ (2002) Invasive population of Xenopus laevis (Daudin) in Chile. Herpetol J 12:163–168
Lőw P, Török J (1998) Prey size selection and food habits of water frogs and moor frogs from Kis-Balaton, Hungary (Anura: Ranidae). Herpetozoa 11:71–78
Measey GJ (1998) Diet of feral Xenopus laevis (Daudin) in South Wales. U.K. J Zool 246:287–298
Measey GJ (2001) Growth and ageing of feral Xenopus laevis (Daudin) in South Wales, UK. J Zool 254:547–555
Measey GJ, Tisley RC (1998) Feral Xenopus laevis in South Wales. Herpetol J 8:23–27
Orizaola G, Braña F (2006) Effect of salmonid introduction and other environmental characteristics on amphibian distribution and abundance in mountain lakes of northern Spain. Anim Conserv 9:171–178
Parker IM, Simberloff D, Lonsdale WM, Goodell K, Wonham M, Kareiva PM, Williamson MH, Von Holle B, Moyle PB, Byers JE, Goldwasser L (1999) Impact: toward a framework for understanding the ecological effects of invaders. Biol invasion 1:3–19
Pianka ER (1973) The structure of lizard communities. Annu Rev Ecol Syst 4:53–74
Rebelo R, Amaral P, Bernardes M, Oliveira J, Pinheiro P, Leitao D (2010) Xenopus laevis (Daudin 1802), a new exotic amphibian in Portugal. Biol invasions DOI 10.1007/s10530-010-9757-0
Ricciardi A (2007) Are modern biological invasions an unprecedented form of global change? Biol Conserv 21:329–336
Ricciardi A, Cohen J (2007) The invasiveness of an introduced species does not predict its impact. Biol Invasions 9:309–315
Sala OE, Chapin FS, Armesto JJ, Berlow E, Bloomfield J, Dirzo R, Huber-Sanwald E, Huenneke LF, Jackson RB, Kinzig A, Leemans R, Lodge DM, Mooney HA, Oesterheld M, Poff NL, Sykes MT, Walker BH, Walker M, Wall DH (2000) Biodiversity: global biodiversity scenarios for the year 2100. Science 287:1770–1774
Sas I, Kovács ÉH, Covaciu-Marcov SD, Strugariu A, Covaci R, Ferenţi S (2007) Food habits of a Pool frog Pelophylax lessonae—Edible frog Pelophylax kl. esculentus population from North-Western Romania. Biota 8:71–78
Savage JA (1987) Extinction of an island forest avifauna by an introduced snake. Ecology 68:660–668
Scott NJ, Woodward BD (1994) Surveys at breeding sites. In: Heyer WR, Donnelly MA, McDiarmid RW, Hayek LA, Foster MS (eds) Measuring and monitoring biological diversity, standard methods for amphibians. Smithsonian Institution Press, Washington, pp 183–205
Sicilia A, Lillo F, Zava B, Bernini F (2006) Breeding phenology of Bufo viridis Laurenti, 1768 in Sicily. Acta Herpetol 1:107–117
Solé M, Beckmann O, Pelz B, Kwet A, Engels W (2005) Stomach-flushing for diet analysis in anurans: an improved protocol evaluated in a case study in Araucaria forests, southern Brazil. Stud Neotrop Fauna Environ 40:23–28
Tinsley RC, McCoid MJ (1996) Feral Population of Xenopus outside Africa. In: Tinsley RC, Kobel HR (eds) The Biology of Xenopus. Oxford University Press, Oxford, pp 81–94
Tinsley RC, Loumont C, Kobel HR (1996) Geographical distribution and ecology. In: Tinsley RC, Kobel HR (eds) The Biology of Xenopus. Oxford University Press, Oxford, pp 35–59
Videler JJ, Jorna JT (1985) Functions of the sliding pelvis in Xenopus laevis. Copeia 1:254–257
Weldon C, Du Preez LH, Hyatt AD, Muller R, Speare R (2004) Origin of the amphibian Chytrid Fungus. Emerg Infect Dis 12:2100–2105
Weldon C, De Villiers AL, Du Preez LH (2007) Quantification of the trade in Xenopus laevis from South Africa, with implications for biodiversity conservation. Afr J Herpetol 56:77–83
Acknowledgments
We thank to three anonymous referees who contributed helpful comments that strengthened considerably the final version of the manuscript. Special thanks go to all the students and trainees who contributed to the field data collection. We are grateful to all farmers who permitted the scientific activity in private lands and ponds. We thank John J. Borg and Fabrizio Li Vigni for the language revision. This study was financially supported by “MIUR Ex 60% 2007”. The legal permission for this study were allowed by the “Ministero dell’Ambiente e della Tutela del Territorio e del Mare—Direzione Protezione Natura (Prot. DPN-2007-0014605 of 25 May 2007)”.
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Lillo, F., Faraone, F.P. & Lo Valvo, M. Can the introduction of Xenopus laevis affect native amphibian populations? Reduction of reproductive occurrence in presence of the invasive species. Biol Invasions 13, 1533–1541 (2011). https://doi.org/10.1007/s10530-010-9911-8
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DOI: https://doi.org/10.1007/s10530-010-9911-8