Modeling the effects of brine outflow from desalination plants on coastal food-webs of the Levantine basin (eastern Mediterranean Sea)

Michal Grossowicz, Eyal Ofir, Ateret Shabtay, Julie Wood, Eli Biton, Natalia Belkin, Ori Frid, Guy Sisma-Ventura, Nurit Kress, Ilana Berman-Frank, Gideon Gal

Research output: Contribution to journalArticlepeer-review

Abstract

Population growth and climate change have led to an increasing demand for freshwater, and subsequently to an exponential growth of the seawater desalination industry in which the number of reverse osmosis-based plants is constantly increasing. The purpose of this study was to examine the possible impact of brine discharge on the marine food-web by constructing and analyzing food-web models from two desalination plant environments located along the Israeli coastline. The models were constructed using the Ecopath and Ecosim with Ecospace modeling suite, and analyses of collected samples were used for calibration and validation. Additionally, we conducted a series of scenarios in order to evaluate the impact of increased salinity and temperature on the food-web. A comparison between model output and measured isotopic δ15N values yielded a good fit. In addition, Ecopath results illustrated the importance of the zooplankton groups both in terms of biomass and trophic level. Ecospace results indicated that most functional groups biomass decreased compared to the “no desalination” scenario. The results indicate that elevated temperature most likely has a greater effect than increased salinity on the food-web, and that there is a general decrease in functional groups biomass due to desalination.

Original languageEnglish
Article number114757
JournalDesalination
Volume496
DOIs
StatePublished - 15 Dec 2020

Bibliographical note

Funding Information:
This work was supported by the Israel Ministry of Science and Technology [grant number 3-12373 to IBF, NK, S. Brenner, and GG] in collaboration with the Israel Ministry of Environmental Protection, the Israel Ministry of Energy, and the Israel Water Authority.

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

  • Desalination brine
  • Desalination impacts
  • Ecosystem modeling
  • Food-web
  • Israeli coast
  • Levantine Basin

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)
  • Materials Science (all)
  • Water Science and Technology
  • Mechanical Engineering

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