Abstract


COASTAL EUTROPHICATION MAY DRIVE THE NATIVE SPECIES CARYBDEA MARSUPIALIS (CNIDARIA: CUBOZOA) TO AN “INVADER STATUS” IN THE MEDITERRANEAN

Native species can become invaders in their natural habitats as consequence of human alteration of the ecosystem. We have observed a positive correlation between the presence of the cubozoan Carybdea marsupialis along the coast of Denia (NW Mediterranean, Spain) and nutrient concentrations. To elucidate which are the mechanisms behind this relationship, we analyzed data on nutrient concentrations, Chlorophyll a, POM, and microplankton, mesozooplankton and cubomedusae abundance. We also used isotopic signals to trace anthropogenic sources of N and C entering the marine food web. We propose that anthropogenic nutrient inputs scale up the food web and by means of trophic cascades they affect the abundance of jellyfish. Changes in the surrounding Posidonia oceanica meadows, and in the crustacean and polychaete communities associated to them, might be also related with C. marsupialis proliferations. Overall, the outbreaks of the species recorded along the Spanish Mediterranean coast coincide with urban areas, riverine discharges and harbours.

Authors

Acevedo, M. J., Institut de Ciències del Mar - Consejo Superior de Investigaciones Científicas, Spain, acevedo@icm.csic.es

Canepa, A., Institut de Ciències del Mar - Consejo Superior de Investigaciones Científicas, Spain, canepa@icm.csic.es

Zappu, S., Institut de Ciències del Mar - Consejo Superior de Investigaciones Científicas, Spain, sabrina2901@gmail.com

Bosch-Belmar, M., Department of Biological and Environmental Sciences and Technologies (DiSTeBA), Univ. of Salento, Italy, mar.b.belmar@gmail.com

Alonso, C., Department of Ecology and IMEM , Spain, cris.cubomed@gmail.com

Bordehore, C., Department of Ecology and IMEM , Spain, cesar.bordehore@ua.es

Calbet, A., Institut de Ciències del Mar - Consejo Superior de Investigaciones Científicas, Spain, acalbet@icm.csic.es

Fuentes, V., Institut de Ciències del Mar - Consejo Superior de Investigaciones Científicas, Spain, vfuentes@icm.csic.es

Details

Oral presentation

Session #:036
Date: 2/25/2015
Time: 10:45
Location: Seminario 3-4-5 (Floor 1)

Presentation is given by student: Yes