Blooms of the invasive ctenophore, Mnemiopsis leidyi, span the Mediterranean Sea in 2009
Blooms of the invasive ctenophore, Mnemiopsis leidyi, occurred in 2009 along the Mediterranean Sea coasts of Spain and Israel. This voracious zooplanktivore spread throughout the Black Sea basin after its introduction in the early 1980s, throughout northern European coastal waters, and now occurs throughout the Mediterranean Sea. M. leidyi occurred throughout the summer along the entire Catalan Spanish and Israeli coasts in 2009. Those locations had high temperatures (18–26°C) and salinities (37–38) during the blooms. The patterns of abundance of large jellyfish along the Catalan coast were unusual in 2009, with low numbers during July, August, and September when ctenophores were abundant. Small populations of those potential predators and food competitors of M. leidyi could have contributed to the ctenophore bloom. The identity of the ctenophores from Spain and Israel was confirmed as M. leidyi by molecular analysis based on DNA sequencing of the nuclear internal transcribed spacer (ITS) regions. This is the first molecular confirmation of M. leidyi in the Mediterranean Sea. Most ctenophores had an ITS genotype previously found in M. leidyi from other invaded regions (the Black, Azov, and Mediterranean seas), as well as native regions in the United States, suggesting common ancestry. Based on the circulation patterns of Mediterranean surface waters and shipping activities, we conclude that the spread of M. leidyi in the Mediterranean probably resulted from re-introductions by ballast water transport and subsequent distribution by currents. We also conclude that the near-simultaneous blooms in opposite ends of both the Mediterranean basins indicate that M. leidyi is resident around the Mediterranean. We discuss environmental conditions, food, and predators of M. leidyi in both regions that would influence the future effects of this voracious consumer on the pelagic food web of the Mediterranean Sea.
KeywordsJellyfish Zooplankton Climate Israel Spain
- ACA, 2009. Catalan water agency “Medusa Project”, http://aca-web.gencat.cat:80/aca/appmanager/aca/aca?_nfpb=true&_pageLabel=P20200961581250777240625&_nfls=false.
- Bas, C., F. Maynou, F. Sardà & J. Leonard, 2003. Variacions demogràfiques a les poblacions d’espècies demersals explotades: es darrers quaranta anys a Blanes i Barcelona. Institut d’Estudis Catalans. Secció de Ciències Biològiques Vol. 135: 202 pp.Google Scholar
- Bayha, K. M., 2005. The molecular systematics and population genetics of four coastal ctenophores and scyphozoan jellyfish of the U.S. Atlantic and Gulf of Mexico. Ph.D. Dissertation, The University of Delaware, Newark.Google Scholar
- Bayha, K. M., G. R. Harbison, J. H. McDonald & P. M. Gaffney, 2004. Preliminary investigation on the molecular systematics of the invasive ctenophore Beroe ovata. In Dumont, H., T. A. Shiganova & U. Niermann (eds), Aquatic Invasions in the Black, Caspian and Mediterranean Seas. Kluwer Academic Publishers, Dordrecht: 167–175.CrossRefGoogle Scholar
- CAMERI (Coastal and Marine Engineering Institute of the Technion), 2008. Annual report for the Israel Ports Development & Assets Company Ltd, http://eng.israports.co.il/.
- Estrada, M., 1996. Primary production in the northwestern Mediterranean. Scientia Marina 60(Suppl. 2): 55–64.Google Scholar
- Faris, S., 2009. A gelatinous invasion. Time 174: 47–48.Google Scholar
- Font, J., J. Salat & J. Tintoré, 1988. Permanent features of the circulation in the Catalan Sea. Oceanologica Acta 1988: 51–57.Google Scholar
- Galil, B. S., E. Spanier & W. W. Ferguson, 1990. The scyphomedusae of the Mediterranean coast of Israel, including two Lessepsian migrants new to the Mediterranean. Zoologische Mededelingen 64: 95–105.Google Scholar
- Galil, B. S., N. Kress & T. A. Shiganova, 2009. First record of Mnemiopsis leidyi A. Agassiz, 1865 (Ctenophora Lobata Mnemiidae) off the Mediterranean coast of Israel. Aquatic Invasions 4: 356–362.Google Scholar
- García, E., J. Tintoré, J. Pinot, J. Font & M. Manríquez, 1994. Surface circulation and dynamics of the Balearic Sea. Coastal and Estuarine Studies 46: 73–91.Google Scholar
- GESAMP (IMO/FAO/UNESCO-IOC/WMO/WHO/IAEA/UN/UNEP Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection), 1997. Opportunistic settlers and the problem of the ctenophore Mnemiopsis leidyi invasion in the Black Sea. Report and Studies GESAMP 58: 84 pp.Google Scholar
- Gili, J. M. & F. Pagés, 2005. Les proliferacions de meduses. Bolletí de la Societat d’Història Natural de les Balears 48: 9–22.Google Scholar
- Gili, J. M., V. Fuentes & D. Atienza, 2007. Medusa project: data year 2007. Technical report No. 1: 98 pp.Google Scholar
- Gili, J. M., V. Fuentes & D. Atienza, 2008. Medusa project: data year 2008. Technical report No. 2: 198 pp.Google Scholar
- Gorokhova, E., M. Lehtiniemi, S. Viitasalo-Frosen & S. H. D. Haddock, 2009. Molecular evidence for the occurrence of ctenophore Mertensia ovum in the northern Baltic Sea and implications for the status of the Mnemiopsis leidyi invasion. Limnology and Oceanography 54: 2025–2033.Google Scholar
- Herut, B., E. Shefer & Y. Cohen, 2005. Environmental quality of Israel’s Mediterranean coastal waters in 2004. IOLR Report H34/2005.Google Scholar
- Herut, B., Y. Cohen, E. Shefer, N. Gordon, B. Galil, G. Tibor & M. Tom, 2006. Environmental quality of Israel’s Mediterranean coastal waters in 2005. IOLR Report H25/2006.Google Scholar
- Herut, B., E. Shefer, N. Gordon, B. Galil, G. Tibor & M. Tom, 2008. Environmental quality of Israel’s Mediterranean coastal waters in 2007. IOLR Report H52/2008.Google Scholar
- IEC (Israel Electric Corporation), 2009. Environmental report 2009 (in preparation).Google Scholar
- Isinibilir, M. & A. N. Tarkan, 2002. Distribution of the invasive ctenophore Mnemiopsis leidyi in the north-eastern Aegean Sea in August 1998. Turkish Journal of Fisheries and Aquatic Sciences 2: 129–132.Google Scholar
- Javidpour, J., J. Molinero & J. Peschutter, 2008. Seasonal changes and population dynamics of the ctenophore Mnemiopsis leidyi after its first year of invasion in the Kiel Fjord, Western Baltic sea. Biological Invasions. doi:10.1007/s10530-008-9300-8.
- Kideys, A. E. & U. Niermann, 1993. Intrusion of Mnemiopsis mccradyi (Ctenophora; Lobata) into the Mediterranean Sea. Senckenbergiana Maritima 23: 43–47.Google Scholar
- Lehtiniemi, M., J. P. Pääkkönen, J. Flinkman, T. Katajisto, E. Gorokhova, M. Karajalanein, S. Viitasalo & H. Björk, 2007. Distribution and abundance of the American comb jelly (Mnemiopsis leidyi) – a rapid invasion to the northern Baltic Sea during 2007. Aquatic Invasions 2: 445–449.CrossRefGoogle Scholar
- Leonard, J. & F. Maynou, 2003. Fish stocks assessment in the Mediterranean: state of the art. In Ulltang, O. & G. Blom (eds), Fish Stocks Assessments and Predictions: Integrating Relevant Knowledge. Scientia Marina 67 (Suppl. 1): 37–49.Google Scholar
- OCEANA, 2008. Illes Balears: propuesta para la gestión de habitat amenazados y la pezca, http://oceana.org/fileadmin/oceana/uploads/europe/reports/Illes_Balears_OCEANA.pdf.
- Oguz, T., 2005. Long-term impacts of anthropogenic forcing on the Black Sea ecosystem. Oceanography 18: 112–121.Google Scholar
- Pisanty, S. & E. Grofit, 1991. Limiting effort in the Israeli trawl fishery. Fisheries and Fishbreeding in Israel 24: 100–133. (in Hebrew with English abstract).Google Scholar
- Purcell, J. E. & M. B. Decker, 2005. Effects of climate on relative predation by scyphomedusae and ctenophores on copepods in Chesapeake Bay during 1987–2000. Limnology and Oceanography 50: 376–387. http://aslo.org/lo/toc/vol_50/issue_1/0376.pdf.
- REMPEC (Regional Marine Pollution Emergency Response Centre for the Mediterranean Sea), 2008. Study of maritime traffic flows in the Mediterranean Sea. Final report, Unrestricted Version, EU-Funded MEDA Regional Project MED 2005/109-573.Google Scholar
- Rosentraub, Z. & S. Brenner, 2007. Circulation over the southeastern continental shelf and slope of the Mediterranean Sea: direct current measurements, winds, and numerical model simulations. Journal of Geophysical Research: Oceans 112(C11001): 1–21.Google Scholar
- Sabatés, A., F. Pagès, D. Atienza, V. Fuentes, J. E. Purcell & J.-M. Gili, this volume. Planktonic cnidarian distribution and feeding of Pelagia noctiluca from near shore to open sea in the NW Mediterranean. Hydrobiologia. doi:10.1007/s10750-010-0221-z.
- Salat, J., 1995. The circulation between the Catalan and Balearic currents in the southern Catalan Sea. Oceanologica Acta 18: 227–234.Google Scholar
- Shiganova, T. A., Z. A. Mirzoyan, E. A. Studenikina, S. P. Volovik, I. Siokou-Frangou, S. Zervoudaki, E. D. Christou, A. Y. Skirta & H. J. Dumont, 2001. Population development of the invader ctenophore Mnemiopsis leidyi in the Black Sea and other seas of the Mediterranean basin. Marine Biology 139: 431–445.CrossRefGoogle Scholar
- Shiganova, T. A., E. D. Christou, J. V. Bulgakova, I. Siokou-Frangou, S. Zervoudaki & A. Siapatis, 2004. Study on the distribution and biology of the invader M. leidyi in the northern Aegean Sea, comparison with indigenous species Bolinopsis vitrea. In Dumont, H., T. A. Shiganova & U. Niermann (eds), The Ctenophore Mnemiopsis leidyi in the Black, Caspian and Mediterranean Seas and Other Aquatic Invasions. NATO Science Series: IV. Earth and Environmental Sciences, Vol. 35. Kluwer Academic Publishers, Dordrecht: 113–135.Google Scholar
- Vinogradov, M. E. & E. A. Shushkina, 1992. Temporal changes in community structure in the open Black Sea. Oceanology 32: 485–491.Google Scholar
- Vinogradov, M. E., E. A. Shushkina, E. I. Musayeva & P. Y. Sorokin, 1989. A newly acclimated species in the Black Sea: the ctenophore Mnemiopsis leidyi (Ctenophora: Lobata). Oceanology 29: 220–224.Google Scholar