The following supplement accompanies the article Mass mortality hits gorgonian forests at Montecristo Island Eva Turicchia*, Marco Abbiati, Michael Sweet and Massimo Ponti *Corresponding author: [email protected] Diseases of Aquatic Organisms 131: 79–85 (2018) Table S1. Updated chronology of mass mortality events hitting gorgonians in the western Mediterranean Sea (modified and updated from Calvo et al. 2011). Year Locations Scale Depth range Species References (m) 1983 La Ciotat (Ligurian Sea) Local 0 to 20 Eunicella singularis Harmelin 1984 Corallium rubrum 1986 Portofino Promontory (Ligurian Local 0 to 20 Eunicella cavolini Bavestrello & Boero 1988 Sea) 1989 Montecristo Island (Tyrrhenian Local - Paramuricea clavata Guldenschuh in Bavestrello et al. 1994 Sea) 1992 Medes Islands (north-western Local 0 to 14 Paramuricea clavata Coma & Zabala 1992 Mediterranean Sea), Port-Cros 10 to 45 Harmelin & Marinopoulos 1994 National Park 1993 Strait of Messina (Tyrrhenian Local 20 to 39 Paramuricea clavata Mistri & Ceccherelli 1996 Sea), Portofino Promontory Bavestrello et al. 1994 (Ligurian Sea) 1999 Coast of Provence and Ligurian Regional 0 to 45 Paramuricea clavata Cerrano et al. 2000 Sea, Balearic Islands (north- Eunicella singularis Perez et al. 2000 western Mediterranean Sea), Eunicella cavolini Garrabou et al. 2001 Gulf of La Spezia, Port-Cros Eunicella verrucosa Linares et al. 2005 National Park, coast of Calafuria Corallium rubrum Bramanti et al. 2005 (Tyrrhenian Sea) Leptogorgia Coma et al. 2006 sarmentosa Cupido et al. 2008 Crisci et al. 2011 2001 Tavolara Island (Tyrrhenian Sea) Local 10 to 45 Paramuricea Calvisi et al. 2003 clavata Eunicella cavolini 2002 Ischia and Procida Islands Local 15 to 20 Paramuricea clavata Gambi et al. 2006 (Tyrrhenian Sea) Eunicella singularis 2003 Gulf of Genova, Provence coast, Regional 0 to 40 Paramuricea clavata Bally & Garrabou 2007 Corsica−Sardinia, Gulf of Eunicella singularis Gambi et al. 2006 Naples, Balearic Islands, Catalan Eunicella cavolini Cupido et al. 2008 coast, Medes Islands, Gulf of La Eunicella verrucosa Garrabou et al. 2009 Spezia Corallium rubrum Bensoussan et al. 2010 Leptogorgia Crisci et al. 2011 sarmentosa Sini et al. 2015 2005 Ischia and Procida Islands Local 16 to 22 Eunicella cavolini Cigliano & Gambi 2007 (Tyrrhenian Sea) Eunicella singularis 2006 Coast of Provence (north- Local 20 Paramuricea clavata Bensoussan et al. 2010 western Mediterranean Sea) 2007 Cabo de Palos-Cabrera Island Local 0 to 45 Eunicella singularis Coma et al. 2007 (north-western Mediterranean Sea) 2008 Tavolara Island (Tyrrhenian Sea) Local 15 to 43 Paramuricea clavata Vezzulli et al. 2010 Huete-Stauffer et al. 2011 Grotta Azzurra, Palinuro Local 15 to 20 Eunicella cavolini Gambi et al. 2010 (Tyrrhenian Sea) 1 Gulf of Naples (Tyrrhenian Sea) Local 18 Eunicella cavolini Carella et al. 2014 Eunicella singularis 2009 Gulf of Naples (Tyrrhenian Sea) Local 28 Eunicella cavolini Gambi et al. 2010 Eunicella singularis Carella et al. 2014 Paramuricea clavata 2011 Pantelleria Island (Strait of Local >60 Paramuricea clavata Vezzulli et al. 2013 Sicily) 2015 Tabarca, Spain (south-western Local 20 to 25 Eunicella singularis Rubio-Portillo et al. 2016 Mediterranean Sea) Leptogorgia sarmentosa 2017 Montecristo Island (Tyrrhenian Local 10 to 30 Eunicella cavolini present study Sea) Eunicella singularis Ischia Island (Tyrrhenian Sea) Local 15 to 22 Eunicella cavolini Gambi et al. 2018 Eunicella singularis Banyuls sur mer, Cap de Creus Local Eunicella singularis L. 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