New evidence of Melithaea erythraea colonization in the Mediterranean

Michal Grossowicz, Eli Shemesh, Stephane Martinez, Yehuda Benayahu, Dan Tchernov

Research output: Contribution to journalArticlepeer-review

Abstract

The Indo-Pacific gorgonian coral Melithaea erythraea (Melithaeidae, previously Acabaria) was first recorded in the Mediterranean in 1999 in the harbor of the Hadera power station, Israel. This species is the only octocoral known to have invaded the Mediterranean Sea. In the past two decades, it has demonstrated a stable population in this harbor, and never found outside this location, not even on the adjacent natural rocky reefs. Then, during 2015, several specimens of M. erythraea were found on a natural substrate at Nahsholim, Israel, about 23 km north of the power station. This is the first evidence of this coral's existence beyond the power plant harbor. The number of colonies there suggests that the population is sustainable, but further study is needed. Although no genetic differences were found among specimens from Nahsholim, Hadera, and the Red Sea, their bacterial epibiota has undergone change following migration. The carbon source and trophic position are similar between the Red Sea and the Mediterranean, suggesting that there is no nutritional barrier to migration for the coral. The larval connectivity model supports the hypothesis that the planulae that have settled in Nahsholim originated from the Port of Hadera, although other arrival scenarios are also possible. The spread of this species suggests that the eastern Mediterranean is becoming increasingly suitable for migrating corals, joining the many other Indo-Pacific migrants that have already established populations there.

Original languageEnglish
Article number106652
JournalEstuarine, Coastal and Shelf Science
Volume236
DOIs
StatePublished - 5 May 2020

Bibliographical note

Funding Information:
We would like to thank Dr Yaniv Aluma from Tel Aviv University and Prof. Maoz Fine from Bar-Ilan University and the Interuniversity Institute for Marine Sciences in Eilat, Israel, for advising on coral location and presence in the port; Dr Revital Ben David-Zaslow from the Steinhardt Museum of Natural History, Israel National Center for Biodiversity Studies, Tel Aviv, Israel, for M. erythraea specimens; Prof. Hezi Gildor from the Hebrew University of Jerusalem, Israel, for fruitful discussions and for assistance in the set-up and usage of the PaTATO model; Dr Dafna Ben Yosef from Israel Oceanographic and Limnological Research for discussions; Eitan Maharam (Northern Wind Diving Center, Nahsholim, Israel), Dr Ateret Shabtay (Technion, Israel), Hagai Nativ, and Ziv Zemah-Shamir (University of Haifa, Israel) for diving support; Naomi Paz (Tel Aviv University, Israel) for editorial assistance; the Port of Hadera Authority and Eilat-Ashqelon Pipe-Line Company for permissions to conduct the surveys in their areas; and the Israel Nature and Parks Authority for permits. Financial support was provided to MG by the Sea Research Center of Israel (MERCI) consortium.

Funding Information:
We would like to thank Dr Yaniv Aluma from Tel Aviv University and Prof. Maoz Fine from Bar-Ilan University and the Interuniversity Institute for Marine Sciences in Eilat, Israel, for advising on coral location and presence in the port; Dr Revital Ben David-Zaslow from the Steinhardt Museum of Natural History, Israel National Center for Biodiversity Studies, Tel Aviv, Israel, for M. erythraea specimens; Prof. Hezi Gildor from the Hebrew University of Jerusalem, Israel, for fruitful discussions and for assistance in the set-up and usage of the PaTATO model; Dr Dafna Ben Yosef from Israel Oceanographic and Limnological Research for discussions; Eitan Maharam (Northern Wind Diving Center, Nahsholim, Israel), Dr Ateret Shabtay (Technion, Israel), Hagai Nativ, and Ziv Zemah-Shamir (University of Haifa, Israel) for diving support; Naomi Paz (Tel Aviv University, Israel) for editorial assistance; the Port of Hadera Authority and Eilat-Ashqelon Pipe-Line Company for permissions to conduct the surveys in their areas; and the Israel Nature and Parks Authority for permits. Financial support was provided to MG by the Sea Research Center of Israel (MERCI) consortium .

Publisher Copyright:
© 2020 Elsevier Ltd

Keywords

  • Alien species
  • Bacterial epibiota
  • Larval dispersal
  • Lessepsian migration
  • Stable-isotope analysis

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science

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