Table S1. List of papers excluded after reading of the full text and reasons for exclusion
Reference
Reason for exclusion
Antolic et al. 2008 - Nova Hedwigia 86: 155167
Antoniadou & Chiniroglou 2007 - Journal of the
Marine Biological Association of the United
Kingdom 87: 629-641
Argyrou et al. 1999 - Oceanologica Acta 22:
517-528
no replication
it not possible to assess whether a site was
invaded or not: this is done a posteriori
sampling has been done only 1 time before and 1
time after; in addition, the 10 grab samples have
been pooled (not averaged) so that there is no
mean
Arigoni et al. 2002 - Journal of Fish Biology 60: variations in number of green or brown
1486-1497
individuals cannot be interpreted as positive or
negative effects by the non-native species
Bartoli & Boudouresque 1997 - Marine data on parasite species; data on fitness variable
Ecology-Progress Series 154: 253-260
different from growth or survival and without
measures of variability
Bellan-Santini et al. 1996 - Journal of the no replication
Marine Biological Association of the United
Kingdom 76: 235-237
Box et al. 2009 - Journal of Experimental fitness variables different from growth or
Marine Biology and Ecology 380: 11–23
survival
Box et al. 2010 - Botanica Marina 53: 367-375
no replication
Boudoresque et al. 1996 - Aquatic Botany 53: Fitness variables different from growth or
245-250
survival
Burfeind et al. 2009 - Environmental Biology of preferences for different habitats cannot be
Fishes 84: 317-322
interpreted as positive or negative effects by the
non-native species
Cabanellas-Reboredo et al. 2010 - Scientia the invaded and reference sites are on different
Marina 74: 101-110
islands (Mallorca vs Ibiza). The design is totally
confounded
Casu et al. 2009 - Aquatic Ecology 43 : 1023- variations in isotopes cannot be interpreted as
1029
positive or negative effects by the non-native
species
Curiel et al. 2002 - Hydrobiologia 477: 209-219 no measures of variability
DeVillele & Verlaque 1995 - Botanica Marina no data on number of replicates; fitness variables
38: 79-87
different from growth or survival
Dumay et al. 2004 - Phytochemistry 65: 3211- fitness variables different from growth or
3220
survival
Ceccherelli & Cinelli 1997 - Journal of data were not used as they are the same reported
Experimental Biology and Ecology 217: 165- in the (included) study by Ceccherelli and Sechi
177
2002
Deudero et al. 2011 - Estuarine Coastal and no measures of variability
Shelf Science 93: 106-116
Engelen 2011 - Hydrobiologia 669: 157-165
response variables cannot be interpreted as
positive or negative effects of non-native species
on grazers
Farrel & Fletcher 2004 - Journal of the effects of removing Undaria or the resident
Experimental Marine Biology and Ecology 334: kelp species could not be disentangled
236-243
Gribben & Wright 2006 - Oecologia 149: 352fitness variables different from growth or
361
Gribben et al. 2009 - Aquatic biology 7: 217227
Husa et al. 2008 - Marine Biology Research 4:
414-428
Irigoyen et al. 2011 - Biological Invasions 13:
17-24
Katsanevakis and Thessalou-Legaki 2009 Aquatic Biology 8: 45-54
survival
fitness variables different from growth or
survival
no measures of variability
fitness variables different from growth or
survival
at some sites, only 1 transect was sampled, while
at others (where P. nobilis was more abundant)
more than 1 transect was sampled; depth differed
among transects; length of the transects differ
Klein & Verlaque 2009 - Hydrobiologia 636: the non-invaded sites is heavily colonized by
369-378
Womersleyella: basically this is a comparison
between C. racemosa invaded and Womerslyella
invaded sites
Levi & Francour 2004 - Journal of Fish Biology no measures of variability
64: 55-64
Longepierre et al. 2005 - Biodiversity and unknown number of temporal samplings and
Conservation 14: 365-376
number of replicates for sites with or without the
non-native species
Lorenti et al. 2011 Marine Ecology-an only one sampling time before and 2 times (very
Evolutionary Perspective 32: 320-334
close) after 24 years
Lyons & Schliebling
2007 - Journal of fitness variables different from growth or
Experimental Marine Biology and Ecology 349: survival
194-204
Montefalcone et al. 2007 Estuarine Coastal and at each meadow (distant 10s of Km) there was
Shelf Science 75: 63-71
only 1 transect at each of 3 depths; values of CI
and SI are averages over the three depths for
each meadow
Nohrén & Odelgard 2010 - Aquatic Biology 9: no measures of variability
139-148
Oakes et al. 2011 - Limnology and variations in isotopes cannot be interpreted as
Oceanography 56: 1824-1831
positive or negative effects by the non-native
species
Pedersen et al. 2005 Aquatic Botany 83: 31-47
no useful data (biomass/cover/growth of the
non-native vs those of another alga)
Pederson & Johnson 2008 - Ices Journal of no measures of variability
Marine Science 65: 1-11
Peirano et al. 2005 Marine Pollution Bulletin 50: at each meadow (distant 10s of Km) there was
817-822
only 1 transect at each of 3 depths; values of CI
and SI are averages over the three depths for
each meadow
Piazzi & Cinelli 2001 Botanica Marina 44: 509- no reference site
520
Relini et al. 1998 - Biologia Marina no replication; no measures of variability
Mediterranea 5: 185-195
Relini et al. 1998 - Italian Journal of Zoology no measures of variability
65: 465-470
Sanchez & Fernandez 2006 - Marine Ecology no data on the effects of Sargassum on other
Progress Series 313: 85-94
species
Vazquez-Luis et al. 2010 - Hydrobiologia fitness variables different from growth or
654:147–154
survival; no measures of variability
Verlaque & Fritayre 1994 - Oceanologica Acta unknown number of replicates
17: 659-672
Viejo 1999 - Aquatic Botany 64: 131-149
Sargassum is in pools, while Fucus is not. The
comparison between Sargassum and Cystoseira
(1 invader versus 1 native) is not useful
Ulas et al. 2011 - Turkish Journal of Fisheries no measures of variability
and Aquatic Sciences 11: 385-391
Zuljevic 2011 - Biological Invasions 13: 2303- no controls and no replicated sites
2308