Ecological Archives E096-179-A2

Ecological Archives E096-179-A2

M. C. Jackson. 2015. Interactions among multiple invasive animals. Ecology 96:2035–2041. http://dx.doi.org/10.1890/15-0171.1

Appendix B. Information on the individual studies used in both meta-analyses.

Table B1. Information on the individual studies used in the first meta-analysis. Interaction type was determined using Hedge’s d (d) and confidence intervals (95% CI; Lower (L) and Upper (U)).

First Author	Year	System	Focal species	Impacting species	Impacting species feeding group	Study type	Response group	d	L CI	U CI	Interaction
Adams	2003	Freshwater	Rana catesbeiana	Lepomis macrochirus	Predator	In situ	Survival	-0.55	-1.96	0.47	Neutral
Adams	2003	Freshwater	Rana catesbeiana	Lepomis macrochirus	Predator	Field survey	Abundance	0.21	-0.43	0.42	Neutral
Adams	2003	Freshwater	Rana catesbeiana	Lepomis macrochirus	Predator	Field survey	Abundance	2.01	1.26	2.31	Positive
Adams	2003	Freshwater	Rana catesbeiana	Lepomis macrochirus	Predator	In situ	Survival	2.80	0.85	4.74	Positive
Boone	2007	Freshwater	Lepomis macrochirus	Rana catesbeiana	Predator	Laboratory	Growth	0.82	-0.20	1.35	Neutral
Boone	2007	Freshwater	Rana catesbeiana	Lepomis macrochirus	Predator	Laboratory	Growth	5.16	3.99	5.87	Positive
Braks	2004	Freshwater	Aedes albopictus	Aedes aegypti	Herbivore	Mesocosm	Survival	-0.39	-1.79	0.61	Neutral
Braks	2004	Freshwater	Aedes aegypti	Aedes albopictus	Herbivore	Mesocosm	Survival	-0.43	-1.84	0.57	Neutral
Buric	2009	Freshwater	Dikerogammarus villosus	Orconectes limosus	Omnivore	Laboratory	Survival	0.50	-1.13	1.85	Neutral
Buric	2009	Freshwater	Orconectes limosus	Dikerogammarus villosus	Predator	Laboratory	Survival	-1.49	-3.30	0.18	Neutral
Cope	2004	Freshwater	Physella acuta	Potamopyrgus antipodarum	Herbivore	Laboratory	Growth	0.00	-1.60	1.31	Neutral
Cope	2004	Freshwater	Potamopyrgus antipodarum	Physella acuta	Herbivore	Laboratory	Growth	-1.53	-3.35	0.16	Neutral
Dick	2000	Freshwater	Gammarus tigrinus	Dikerogammarus vilosus	Predator	Laboratory	Survival	-6.15	-8.49	-3.34	Negative
Dick	2000	Freshwater	Gammarus tigrinus	Dikerogammarus vilosus	Predator	Laboratory	Survival	-1.97	-3.16	-1.24	Negative
Jackson	2014	Freshwater	Procambarus clarkii	Astacus leptodactylus	Omnivore	Mesocosm	Diet	-0.98	-2.29	-0.10	Negative
Jackson	2014	Freshwater	Pacifastacus leniusculus	Orconectes virilis	Omnivore	Mesocosm	Diet	-1.99	-3.51	-0.82	Negative
Jackson	2014	Freshwater	Orconectes virilis	Pacifastacus leniusculus	Omnivore	Mesocosm	Diet	-0.81	-2.10	0.03	Neutral
Jackson	2014	Freshwater	Astacus leptodactylus	Procambarus clarkii	Omnivore	Mesocosm	Diet	-0.96	-2.27	-0.09	Negative
Johnson	2009	Freshwater	Bellamya chinensis	Orconectes rusticus	Omnivore	Mesocosm	Growth	-1.88	-3.24	-0.94	Negative
Johnson	2009	Freshwater	Orconectes rusticus	Bellamya chinensis	Herbivore	Mesocosm	Growth	-1.44	-2.71	-0.62	Negative
Kestrup	2009	Freshwater	Echinogammarus ischnus	Neogobius melanostomus	Predator	In situ	Abundance	-0.68	-1.58	-0.26	Negative
Kestrup	2009	Freshwater	Echinogammarus ischnus	Neogobius melanostomus	Predator	Laboratory	Survival	0.87	-0.23	1.48	Neutral
Olden	2009	Freshwater	Bellamya chinensis	Orconectes virilis	Omnivore	Laboratory	Survival	-6.78	-9.33	-3.47	Negative
Olden	2009	Freshwater	Bellamya chinensis	Procambarus clarkii	Omnivore	Laboratory	Survival	-2.82	-4.21	-1.84	Negative
Oyugi	2011	Freshwater	Oreochromis niloticus	Cyprinus carpio	Omnivore	Laboratory	Behaviour	-2.80	-5.55	1.08	Neutral
Perry	2000	Freshwater	Dreissena polymorpha	Orconectes rusticus	Omnivore	In situ	Abundance	-5.09	-7.24	-2.72	Negative
Platvoet	2009	Freshwater	Gammarus tigrinus	Dikerogammarus villosus	Predator	Laboratory	Survival	1.08	-0.25	1.97	Neutral
Platvoet	2009	Freshwater	Dikerogammarus villosus	Gammarus tigrinus	Predator	Laboratory	Survival	-2.16	-3.72	-0.92	Negative
Van Overdijk	2003	Freshwater	Gammarus fasciatus	Dreissena polymorpha	Omnivore	Laboratory	Abundance	3.60	1.60	5.66	Positive
Van Overdijk	2003	Freshwater	Echinogammarus ischnus	Dreissena polymorpha	Omnivore	Laboratory	Abundance	5.00	2.48	8.23	Positive
van Riel	2009	Freshwater	Gammarus tigrinus	Echinogammarus ischnus	Predator	Laboratory	Survival	0.22	-0.66	0.62	Neutral
van Riel	2009	Freshwater	Gammarus tigrinus	Dikerogammarus villosus	Predator	Laboratory	Survival	-1.90	-2.96	-1.33	Negative
van Riel	2009	Freshwater	Dikerogammarus villosus	Gammarus tigrinus	Predator	Laboratory	Survival	-0.98	-1.84	-0.61	Negative
Collin	2014	Marine	Ciona intestinalis	Caprella mutica	Omnivore	In situ	Abundance	-4.97	-7.48	-1.77	Negative
Griffen	2008	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	In situ	Diet	-0.90	-1.59	-0.66	Negative
Griffen	2008	Marine	Hemigrapsus sanguineus	Carcinus maenas	Predator	In situ	Diet	0.25	-0.40	0.47	Neutral
Lohrer	2002	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	In situ	Abundance	-2.46	-3.63	-1.77	Negative
Lohrer	2002	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	In situ	Abundance	-1.16	-2.11	-0.70	Negative
Lohrer	2002	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	In situ	Abundance	-1.05	-1.99	-0.61	Negative
Lohrer	2002	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	Laboratory	Abundance	-7.81	-11.1	-2.18	Negative
Lohrer	2002	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	Laboratory	Abundance	-2.92	-4.55	-1.57	Negative
Lohrer	2002	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	Laboratory	Abundance	-2.18	-3.61	-1.14	Negative
Lohrer	2002	Marine	Hemigrapsus sanguineus	Carcinus maenas	Predator	In situ	Abundance	-0.21	-1.09	0.18	Neutral
Lohrer	2002	Marine	Hemigrapsus sanguineus	Carcinus maenas	Predator	In situ	Abundance	-0.32	-1.20	0.08	Neutral
Newsom	2014	Marine	Gemma gemma	Carcinus maenas	Predator	Laboratory	Survival	-1.89	-3.31	-0.85	Negative
Newsom	2014	Marine	Carcinus maenas	Philine orientalis	Predator	Laboratory	Diet	-0.45	-1.66	0.28	Neutral
Wonham	2005	Marine	Nassarius fraterculus	Batillaria attramentaria	Herbivore	In situ	Abundance	1.13	0.15	1.62	Positive
Bridgman	2013	Terrestrial	Mus musculus	Rattus rattus	Omnivore	Laboratory	Behaviour	-2.55	-3.87	-1.66	Negative
Bridgman	2013	Terrestrial	Rattus rattus	Mus musculus	Omnivore	Laboratory	Behaviour	-1.03	-2.07	-0.48	Negative
Gomez	2014	Terrestrial	Adelges tsugae	Fiorinia externa	Herbivore	Laboratory	Abundance	-0.88	-1.63	-0.60	Negative
Gomez	2014	Terrestrial	Adelges tsugae	Fiorinia externa	Herbivore	Laboratory	Abundance	-1.26	-2.02	-0.97	Negative
Green	2011	Terrestrial	Achatina fulica	Anoplolepis gracilipes	Predator	Field survey	Abundance	1.35	0.04	2.23	Positive
Miller-Pierce	2012	Terrestrial	Adelges tsugae	Fiorinia externa	Herbivore	In situ	Abundance	-0.16	-1.12	0.30	Neutral
Miller-Pierce	2012	Terrestrial	Fiorinia externa	Adelges tsugae	Herbivore	In situ	Abundance	-0.34	-1.33	0.16	Neutral
O'Dowd	2003	Terrestrial	Tachardina aurantiaca	Anoplolepis gracilipes	Predator	Field survey	Abundance	1.69	0.25	2.76	Positive
Preisser	2008	Terrestrial	Fiorinia externa	Adelges tsugae	Herbivore	In situ	Abundance	-0.16	-0.44	-0.12	Negative
Preisser	2008	Terrestrial	Adelges tsugae	Fiorinia externa	Herbivore	In situ	Abundance	0.16	-0.12	0.20	Neutral

Table B2. Information on the additional individual studies used in the vote counting method. Interaction type was determined based on information presented in each paper.

First Author	Year	System	Focal species	Impacting species	Impacting species feeding group	Study type	Response group	Interaction
Kuhns	1999	Freshwater	Dreissena polymorpha	Neogobius melanostomus	Predator	In situ	Abundance	Negative
Elvira	1996	Freshwater	Procambarus clarkii	Esox lucius	Predator	Field survey	Abundance	Negative
Hudina	2011	Freshwater	Orconectes limosus	Pacifastacus leniusulus	Omnivore	Laboratory	Behaviour	Negative
Kobak	2012	Freshwater	Dreissena polymorpha	Dikerogammarus villosus	Predator	Laboratory	Behaviour	Negative
Ricciardi	2004	Freshwater	Dreissena bugensis	Dreissena polymorpha	Omnivore	Field survey	Abundance	Negative
Tripet	2011	Freshwater	Aedes aegypti	Aedes albopictus	Herbivore	Field survey	Survival	Negative
Jackson	2012	Freshwater	Procambarus clarkii	Cyprinus carpio	Omnivore	Field survey	Diet	Negative
Rothhaupt	2014	Freshwater	Dikerogammarus vilosus	Gammarus roeselii	Omnivore	Field survey	Diet	Negative
Rothhaupt	2014	Freshwater	Gammarus roeselii	Dikerogammarus vilosus	Predator	Field survey	Diet	Negative
MacNeil	2013	Freshwater	Crangonyx pseudogracili	Gammarus pulex	Omnivore	Laboratory	Survival	Negative
MacNeil	2013	Freshwater	Crangonyx pseudogracili	Gammarus pulex	Omnivore	Field survey	Abundance	Negative
Kley	2005	Freshwater	Dikerogammarus bispinosus	Dikerogammarus vilosus	Predator	Field survey	Abundance	Negative
Kinzler	2009	Freshwater	Echinogammarus berilloni	Dikerogammarus vilosus	Predator	Laboratory	Survival	Negative
Britton	2010	Freshwater	Micropterus salmoides	Cyprinus carpio	Omnivore	Field survey	Abundance	Negative
Britton	2010	Freshwater	Procambarus clarkii	Micropterus salmoides	Predator	Field survey	Diet	Negative
Holomuzki	2010	Freshwater	Physella acuta	Salmo trutta	Predator	Field survey	Diet	Negative
Borcherding	2013	Freshwater	Ponticola kessleri	Neogobius melanostomus	Predator	Laboratory	Behaviour	Negative
Miyake	2011	Freshwater	Procambarus clarkii	Rana catesbeiana	Predator	Field survey	Diet	Negative
Miyake	2011	Freshwater	Procambarus clarkii	Channa argus	Predator	Field survey	Diet	Negative
Porter-Whitaker	2012	Freshwater	Hemichromis letourneuxi	Cichlasoma urophthalmus	Predator	Laboratory	Behaviour	Neutral
Porter-Whitaker	2012	Freshwater	Cichlasoma urophthalmus	Hemichromis letourneuxi	Predator	Laboratory	Behaviour	Neutral
Kuhns	1999	Freshwater	Neogobius melanostomus	Dreissena polymorpha	Omnivore	In situ	Abundance	Neutral
Preston	2012	Freshwater	Rana catesbeian	Gambusia affinis	Predator	Mescosm	Abundance	Neutral
Preston	2012	Freshwater	Gambusia affinis	Rana catesbeian	Predator	Mescosm	Abundance	Neutral
Nystrom	2001	Freshwater	Pacifastacus leniusculus	Oncorhynchus mykiss	Predator	In situ	Abundance	Neutral
Nystrom	2001	Freshwater	Oncorhynchus mykiss	Pacifastacus leniusculus	Omnivore	In situ	Abundance	Neutral
Rudnick	2005	Freshwater	Procambarus clarkii	Eriocheir sinensis	Omnivore	Mesocosm	Growth	Neutral
Rudnick	2005	Freshwater	Eriocheir sinensis	Procambarus clarkii	Omnivore	Mesocosm	Growth	Neutral
Hudina	2011	Freshwater	Pacifastacus leniusulus	Orconectes limosus	Omnivore	Laboratory	Behaviour	Neutral
Kobak	2012	Freshwater	Dreissena polymorpha	Pontogammarus robustoides	Omnivore	Laboratory	Behaviour	Neutral
Ricciardi	2004	Freshwater	Dreissena polymorpha	Dreissena bugensis	Omnivore	Field survey	Abundance	Neutral
Tripet	2011	Freshwater	Aedes albopictus	Aedes aegypti	Herbivore	Field survey	Survival	Neutral
Jackson	2012	Freshwater	Cyprinus carpio	Procambarus clarkii	Omnivore	Field survey	Diet	Neutral
Jackson	2014	Freshwater	Pacifastacus leniusculus	Cyprinus carpio	Omnivore	Field survey	Diet	Neutral
Jackson	2014	Freshwater	Pacifastacus leniusculus	Pseudorasbora parva	Omnivore	Field survey	Diet	Neutral
Jackson	2014	Freshwater	Cyprinus carpio	Pseudorasbora parva	Omnivore	Field survey	Diet	Neutral
Jackson	2014	Freshwater	Cyprinus carpio	Pacifastacus leniusculus	Omnivore	Field survey	Diet	Neutral
Jackson	2014	Freshwater	Pseudorasbora parva	Pacifastacus leniusculus	Omnivore	Field survey	Diet	Neutral
Jackson	2014	Freshwater	Pseudorasbora parva	Cyprinus carpio	Omnivore	Field survey	Diet	Neutral
Rothhaupt	2014	Freshwater	Limnomysis benedeni	Katamysis warpachowskyi	Herbivore	Field survey	Diet	Neutral
Rothhaupt	2014	Freshwater	Katamysis warpachowskyi	Limnomysis benedeni	Herbivore	Field survey	Diet	Neutral
Kley	2005	Freshwater	Echinogammarus berilloni	Dikerogammarus vilosus	Predator	Field survey	Abundance	Neutral
Kley	2005	Freshwater	Echinogammarus ischnus	Dikerogammarus vilosus	Predator	Field survey	Abundance	Neutral
Kinzler	2008	Freshwater	Dikerogammarus haemobaphes	Dikerogammarus vilosus	Predator	Laboratory	Survival	Neutral
Kinzler	2008	Freshwater	Dikerogammarus bispinosus	Dikerogammarus vilosus	Predator	Laboratory	Survival	Neutral
Kinzler	2008	Freshwater	Dikerogammarus vilosus	Dikerogammarus haemobaphes	Predator	Laboratory	Survival	Neutral
Kinzler	2008	Freshwater	Dikerogammarus vilosus	Dikerogammarus bispinosus	Predator	Laboratory	Survival	Neutral
Britton	2010	Freshwater	Cyprinus carpio	Micropterus salmoides	Predator	Field survey	Abundance	Neutral
Haynes	1999	Freshwater	Bithynia tentaculata	Dreissena polymorpha	Omnivore	Field survey	Abundance	Neutral
Beekey	2004	Freshwater	Gillia altilis	Dreissena polymorpha	Omnivore	Field survey	Abundance	Neutral
Kiesecker	1998	Freshwater	Rana catesbeiana	Micropterus dolomieui	Predator	In situ	Survival	Neutral
Kiesecker	1998	Freshwater	Micropterus dolomieui	Rana catesbeiana	Predator	In situ	Survival	Neutral
Lawler	1999	Freshwater	Rana catesbeiana	Gambusia affinis	Predator	Mesocosm	Survival	Neutral
Lawler	1999	Freshwater	Gambusia affinis	Rana catesbeiana	Predator	Mesocosm	Survival	Neutral
Borcherding	2013	Freshwater	Neogobius melanostomus	Ponticola kessleri	Predator	Laboratory	Behaviour	Neutral
Miyake	2011	Freshwater	Procambarus clarkii	Trachemys scripta elegans	Predator	Field survey	Diet	Neutral
Moorman	2009	Freshwater	Oncorhynchus mykiss	Castor canadensis	Herbivore	Field survey	Abundance	Neutral
Moorman	2009	Freshwater	Salvelinus fontinalis	Castor canadensis	Herbivore	Field survey	Abundance	Neutral
Ermgassen	2011	Freshwater	Dreissena polymorpha	Pacifastacus leniusculus	Omnivore	Laboratory	Survival	Neutral
Elvira	1996	Freshwater	Esox lucius	Procambarus clarkii	Omnivore	Field survey	Diet	Positive
Olden	2009	Freshwater	Orconectes virilis	Bellamya chinensis	Herbivore	Laboratory	Diet	Positive
Olden	2009	Freshwater	Procambarus clarkii	Bellamya chinensis	Herbivore	Laboratory	Diet	Positive
Kestrup	2009	Freshwater	Echinogammarus ischnus	Dreissena polymorpha	Omnivore	Laboratory	Abundance	Positive
Kinzler	2008	Freshwater	Dikerogammarus vilosus	Echinogammarus berilloni	Predator	Laboratory	Survival	Positive
Britton	2010	Freshwater	Micropterus salmoides	Procambarus clarkii	Omnivore	Field survey	Diet	Positive
Ricciardi	1997	Freshwater	Dugesia polychroa	Dreissena polymorpha	Omnivore	In situ	Abundance	Positive
Ricciardi	1997	Freshwater	Valvata piscinali	Dreissena polymorpha	Omnivore	In situ	Abundance	Positive
Haynes	1999	Freshwater	Gammarus fasciatus	Dreissena polymorpha	Omnivore	Field survey	Abundance	Positive
Beekley	2004	Freshwater	Gammarus fasciatus	Dreissena polymorpha	Omnivore	Field survey	Abundance	Positive
Ermgassen	2011	Freshwater	Pacifastacus leniusculus	Dreissena polymorpha	Omnivore	Laboratory	Diet	Positive
Jenson	2002	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	Mesocosm	Behaviour	Negative
Griffen	2011	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	Field survey	Survival	Negative
Ross	2004	Marine	Carcinus maenas	Asterias amurensis	Predator	In situ	Diet	Negative
Ross	2004	Marine	Asterias amurensis	Carcinus maenas	Predator	In situ	Diet	Negative
O'Connor	2014	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	Field survey	Abundance	Negative
Collin	2014	Marine	Ciona intestinalis	Caprella mutica	Omnivore	Field survey	Abundance	Negative
Jensen	2002	Marine	Hemigrapsus sanguineus	Carcinus maenas	Predator	Mesocosm	Behaviour	Neutral
Griffen	2008	Marine	Hemigrapsus sanguineus	Carcinus maenas	Predator	In situ	Behaviour	Neutral
Griffen	2008	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	In situ	Behaviour	Neutral
O'Connor	2014	Marine	Hemigrapsus sanguineus	Carcinus maenas	Predator	Field survey	Abundance	Neutral
Collin	2014	Marine	Caprella mutica	Ciona intestinalis	Omnivore	Field survey	Abundance	Neutral
Rius	2011	Marine	Ciona intestinalis	Mytilus galloprovincialis	Omnivore	Field survey	Abundance	Neutral
Rius	2011	Marine	Mytilus galloprovincialis	Ciona intestinalis	Omnivore	Field survey	Abundance	Neutral
Griffen	2006	Marine	Carcinus maenas	Hemigrapsus sanguineus	Predator	In situ	Diet	Neutral
Griffen	2006	Marine	Hemigrapsus sanguineus	Carcinus maenas	Predator	In situ	Diet	Neutral
Grosholz	2005	Marine	Gemma gemma	Carcinus maenas	Predator	Field survey	Abundance	Positive
Wonham	2005	Marine	Crepidula convexa	Batillaria attramentaria	Herbivore	Field survey	Abundance	Positive
Wonham	2005	Marine	Diadumene lineata	Batillaria attramentaria	Herbivore	Field survey	Abundance	Positive
Orchan	2012	Terrestrial	Psittacula krameri	Acridotheres tristis	Omnivore	Field survey	Behaviour	Negative
Orchan	2012	Terrestrial	Psittacula krameri	Sturnus burmannicus	Omnivore	Field survey	Behaviour	Negative
Orchan	2012	Terrestrial	Acridotheres tristis	Sturnus burmannicus	Omnivore	Field survey	Behaviour	Negative
Orchan	2012	Terrestrial	Sturnus burmannicus	Acridotheres tristis	Omnivore	Field survey	Behaviour	Negative
LeBrun	2014	Terrestrial	Solenopsis invicta	Nylanderia fulva	Herbivore	Field survey	Behaviour	Negative
Ruscoe	2011	Terrestrial	Mus musculus	Trichosurus vulpecula	Herbivore	In situ	Abundance	Negative
Ruscoe	2011	Terrestrial	Rattus rattus	Trichosurus vulpecula	Herbivore	In situ	Abundance	Negative
Harper	2010	Terrestrial	Mus musculus	Rattus rattus	Omnivore	Field survey	Abundance	Negative
Goldwater	2012	Terrestrial	Mus musculus	Rattus rattus	Omnivore	Field survey	Abundance	Negative
Hervıas	2013	Terrestrial	Rattus rattus	Felis catus	Predator	Field survey	Abundance	Negative
LeBrun	2013	Terrestrial	Solenopsis invicta	Nylanderia fulva	Omnivore	Field survey	Abundance	Negative
Oppel	2014	Terrestrial	Mus musculus	Felis catus	Predator	Field survey	Abundance	Negative
Oppel	2014	Terrestrial	Oryctolagus cuniculus	Felis catus	Predator	Field survey	Abundance	Negative
Oppel	2014	Terrestrial	Mus musculus	Felis catus	Predator	Field survey	Abundance	Negative
Oppel	2014	Terrestrial	Rattus rattus	Felis catus	Predator	Field survey	Abundance	Negative
Oppel	2014	Terrestrial	Rattus norvegicus	Felis catus	Predator	Field survey	Abundance	Negative
Montgomery	2012	Terrestrial	Crocidura russula	Myodes glareolus	Herbivore	Field survey	Abundance	Neutral
LeBrun	2014	Terrestrial	Nylanderia fulva	Solenopsis invicta	Predator	Field survey	Survival	Neutral
Ruscoe	2011	Terrestrial	Rattus rattus	Mustela erminea	Predator	In situ	Abundance	Neutral
Ruscoe	2011	Terrestrial	Trichosurus vulpecula	Mustela erminea	Predator	In situ	Abundance	Neutral
Ruscoe	2011	Terrestrial	Mus musculus	Mustela erminea	Predator	In situ	Abundance	Neutral
Ruscoe	2011	Terrestrial	Mustela erminea	Trichosurus vulpecula	Herbivore	In situ	Abundance	Neutral
Bramley	2014	Terrestrial	Rattus exulans	Rattus norvegicus	Omnivore	Field survey	Abundance	Neutral
Bramley	2014	Terrestrial	Rattus norvegicus	Rattus exulans	Omnivore	Field survey	Abundance	Neutral
Cameron	2013	Terrestrial	Dendrobaena octaedra	Lumbricus terrestris	Herbivore	Mesocosm	Survival	Neutral
Cameron	2013	Terrestrial	Lumbricus terrestris	Dendrobaena octaedra	Herbivore	Mesocosm	Survival	Neutral
Oppel	2014	Terrestrial	Rattus rattus	Felis catus	Predator	Field survey	Abundance	Neutral
Oppel	2014	Terrestrial	Rattus norvegicus	Felis catus	Predator	Field survey	Abundance	Neutral
Oppel	2014	Terrestrial	Oryctolagus cuniculus	Felis catus	Predator	Field survey	Abundance	Neutral
Montgomery	2012	Terrestrial	Myodes glareolus	Crocidura russula	Predator	Field survey	Abundance	Positive
O'Dowd	2003	Terrestrial	Anoplolepis gracilipes	Tachardina aurantiaca	Herbivore	Field survey	Abundance	Positive
Orchan	2012	Terrestrial	Acridotheres tristis	Psittacula krameri	Herbivore	Field survey	Behaviour	Positive
Ness	2013	Terrestrial	Myrmica rubra	Popillia japonica	Herbivore	Field survey	Behaviour	Positive
Helms	2010	Terrestrial	Solenopsis invicta	Antonina graminis	Herbivore	Field survey	Abundance	Positive

Table B3. Information on the individual studies used in the second meta-analysis. Interaction type was determined using Hedge’s d (d) and confidence intervals (95% CI; Lower (L) and Upper (U)).

First Author	Year	System	Invader 1	Invader 2	Study type	Response level	Response group	d	L CI	U CI	Interaction
Boone	2007	Freshwater	Lepomis macrochir	Rana catesbeian	Laboratory	Population	Heterotroph	-0.81	-1.20	-0.42	Antagonistic
Cameron	2013	Terrestrial	Lumbricus terrestris	Dendrobaena octaedra	Mesocosm	Community	Heterotroph	-0.15	-0.91	0.61	Additive
Griffen	2008	Marine	Carcinus maenas	Hemigrapsus sanguineus	In situ	Community	Heterotroph	-3.90	-5.29	-2.51	Antagonisitic
Griffen	2008	Marine	Carcinus maenas	Hemigrapsus sanguineus	In situ	Community	Heterotroph	-2.28	-3.35	-1.22	Antagonisitic
Griffen	2008	Marine	Carcinus maenas	Hemigrapsus sanguineus	In situ	Population	Heterotroph	-2.05	-3.08	-1.02	Antagonisitic
Griffen	2008	Marine	Carcinus maenas	Hemigrapsus sanguineus	In situ	Population	Heterotroph	-2.00	-3.02	-0.98	Antagonisitic
Griffen	2008	Marine	Carcinus maenas	Hemigrapsus sanguineus	In situ	Population	Heterotroph	-1.87	-2.87	-0.87	Antagonisitic
Griffen	2006	Marine	Carcinus maenas	Hemigrapsus sanguineus	In situ	Population	Heterotroph	-0.54	-1.63	0.55	Additive
Griffen	2008	Marine	Carcinus maenas	Hemigrapsus sanguineus	In situ	Community	Autotroph	0.33	-0.52	1.18	Additive
Griffen	2006	Marine	Carcinus maenas	Hemigrapsus sanguineus	In situ	Population	Heterotroph	0.78	0.29	2.11	Synergisitic
Griffen	2008	Marine	Carcinus maenas	Hemigrapsus sanguineus	In situ	Community	Autotroph	1.20	-0.33	1.89	Additive
Jackson	2014	Freshwater	Orconectes virilis	Pacifastacus leniusculus	Mesocosm	Community	Heterotroph	-2.32	-3.67	-0.96	Antagonisitic
Jackson	2014	Freshwater	Procambarus clarkii	Astacus leptodactylus	Mesocosm	Community	Autotroph	-1.26	-2.43	-0.10	Antagonisitic
Jackson	2014	Freshwater	Orconectes virilis	Pacifastacus leniusculus	Mesocosm	Community	Autotroph	-0.54	-1.63	0.55	Additive
Jackson	2014	Freshwater	Procambarus clarkii	Astacus leptodactylus	Mesocosm	Community	Heterotroph	0.93	-0.20	2.05	Additive
Johnson	2009	Freshwater	Bellamya chinensis	Orconectes rusticus	Mesocosm	Population	Heterotroph	-7.30	-9.88	-4.72	Antagonisitic
Johnson	2009	Freshwater	Orconectes rusticus	Bellamya chinensis	Mesocosm	Population	Heterotroph	-3.10	-4.51	-1.69	Antagonisitic
Johnson	2009	Freshwater	Bellamya chinensis	Orconectes rusticus	Mesocosm	Population	Heterotroph	-0.12	-1.09	0.87	Additive
Johnson	2009	Freshwater	Bellamya chinensis	Orconectes rusticus	Mesocosm	Community	Autotroph	0.76	-0.26	1.77	Additive
Kiesecker	1997	Freshwater	Rana catesbeiana	Micropterus dolomieui	In situ	Population	Heterotroph	-2.15	-3.85	-0.44	Antagonisitic
Kuhns	1999	Freshwater	Neogobius melanostomus	Dreissena polymorpha	In situ	Community	Heterotroph	-1.58	-2.80	-0.37	Antagonisitic
Lawler	1998	Freshwater	Gambusia affinis	Rana catesbeiana	Mesocosm	Population	Heterotroph	1.16	-0.32	2.65	Additive
Nystrom	2001	Freshwater	Oncorhynchus mykiss	Pacifastacus leniusculus	In situ	Community	Heterotroph	-1.43	-2.62	-0.24	Antagonisitic
Nystrom	2001	Freshwater	Oncorhynchus mykiss	Pacifastacus leniusculus	In situ	Community	Heterotroph	-0.74	-1.85	0.37	Additive
Nystrom	2001	Freshwater	Oncorhynchus mykiss	Pacifastacus leniusculus	In situ	Community	Heterotroph	-0.43	-1.51	0.66	Additive
Nystrom	2001	Freshwater	Oncorhynchus mykiss	Pacifastacus leniusculus	In situ	Community	Heterotroph	-0.39	-1.48	0.69	Additive
Nystrom	2001	Freshwater	Oncorhynchus mykiss	Pacifastacus leniusculus	In situ	Community	Autotroph	-0.36	-1.44	0.72	Additive
Nystrom	2001	Freshwater	Oncorhynchus mykiss	Pacifastacus leniusculus	In situ	Community	Autotroph	0.41	-0.67	1.50	Additive
PorterWhitaker	2012	Freshwater	Hemichromis letourneuxi	Cichlasoma urophthalmus	In situ	Community	Heterotroph	-0.79	-1.51	-0.08	Antagonisitic
Preisser	2008	Terrestrial	Adelges tsugae	Fiorinia externa	In situ	Population	Autotroph	0.24	0.00	0.48	Synergisitic
Preston	2012	Freshwater	Rana catesbeian	Gambusia affinis	Mesocosm	Population	Heterotroph	-0.51	-1.60	0.57	Additive
Preston	2012	Freshwater	Rana catesbeian	Gambusia affinis	Mesocosm	Community	Heterotroph	-0.39	-1.47	0.70	Additive
Preston	2012	Freshwater	Rana catesbeian	Gambusia affinis	Mesocosm	Community	Autotroph	-0.35	-1.43	0.73	Additive
Preston	2012	Freshwater	Rana catesbeian	Gambusia affinis	Mesocosm	Population	Heterotroph	-0.29	-1.37	0.79	Additive
Preston	2012	Freshwater	Rana catesbeian	Gambusia affinis	Mesocosm	Community	Heterotroph	-0.25	-1.32	0.83	Additive
Preston	2012	Freshwater	Rana catesbeian	Gambusia affinis	Mesocosm	Population	Heterotroph	0.00	-1.07	1.07	Additive
Ross	2004	Marine	Carcinus maenas	Asterias amurensis	In situ	Population	Heterotroph	-3.58	-5.73	-1.42	Antagonisitic
Ross	2004	Marine	Carcinus maenas	Asterias amurensis	In situ	Population	Heterotroph	-3.07	-5.06	-1.09	Antagonisitic
Ross	2004	Marine	Carcinus maenas	Asterias amurensis	In situ	Population	Heterotroph	-0.57	-1.81	0.98	Additive
Ross	2004	Marine	Carcinus maenas	Asterias amurensis	In situ	Population	Heterotroph	-0.41	-1.61	1.17	Additive
Ross	2004	Marine	Carcinus maenas	Asterias amurensis	In situ	Population	Heterotroph	-0.22	-1.52	1.26	Additive
Ross	2004	Marine	Carcinus maenas	Asterias amurensis	In situ	Population	Heterotroph	-0.13	-0.99	1.80	Additive
Ross	2004	Marine	Carcinus maenas	Asterias amurensis	In situ	Population	Heterotroph	0.41	-0.90	1.92	Additive
Ross	2004	Marine	Carcinus maenas	Asterias amurensis	In situ	Population	Heterotroph	0.51	-1.98	0.84	Additive
Rudnick	2005	Freshwater	Procambarus clarkii	Eriocheir sinensis	Mesocosm	Population	Heterotroph	-18.9	-25.17	-12.6	Antagonisitic

Literature cited

Adams, M. J., C. A. Pearl, and R. B. Bury. 2003. Indirect facilitation of an anuran invasion by non-native fishes. Ecology Letters 6:343-351.

Beekey, M. A., D. J. McCabe, and J. E. Marsden. 2004. Zebra mussel colonisation of soft sediments facilitates invertebrate communities. Freshwater Biology 49:535-545.

Boone, M. D., R. D. Semlitsch, E. E. Little, and M. C. Doyle. 2007. Multiple stressors in amphibian communities: Effects of chemical contamination, bullfrogs, and fish. Ecological Applications 17:291-301.

Borcherding, J., A. Hertel, and S. Breiden. 2013. Activity and competitive behaviour of invasive Neogobius melanostomus and Ponticola kessleri (Gobiidae) from the River Rhine, Germany. Ethology Ecology & Evolution 25:351-365.

Braks, M. A. H., N. A. Honorio, L. P. Lounibos, R. Lourenco-De-Oliveira, and S. A. Juliano. 2004. Interspecific competition between two invasive species of container mosquitoes, Aedes aegypti and Aedes albopictus (Diptera : Culicidae), in Brazil. Annals of the Entomological Society of America 97:130-139.

Bramley, G. N. 2014. Habitat use by kiore (Rattus exulans) and Norway rats (R-norvegicus) on Kapiti Island, New Zealand. New Zealand Journal of Ecology 38:64-75.

Bridgman, L. J., J. Innes, C. Gillies, N. B. Fitzgerald, S. Miller, and C. M. King. 2013. Do ship rats display predatory behaviour towards house mice? Animal Behaviour 86:257-268.

Britton, J. R., D. M. Harper, D. O. Oyugi, and J. Grey. 2010. The introduced Micropterus salmoides in an equatorial lake: a paradoxical loser in an invasion meltdown scenario? Biological Invasions 12:3439-3448.

Buric, M., L. Koci, A. Petrusek, A. Kouba, and P. Kozak. 2009. Invaders eating invaders: potential trophic interactions between the amphipod Dikerogammarus villosus and juvenile crayfish Orconectes limosus. Knowledge and Management of Aquatic Ecosystems 394-395.

Cameron, E. K., K. M. Knysh, H. C. Proctor, and E. M. Bayne. 2013. Influence of two exotic earthworm species with different foraging strategies on abundance and composition of boreal microarthropods. Soil Biology & Biochemistry 57:334-340.

Collin, S. B. and L. E. Johnson. 2014. Invasive species contribute to biotic resistance: negative effect of caprellid amphipods on an invasive tunicate. Biological Invasions 16:2209-2219.

Cope, N. J. and M. J. Winterbourn. 2004. Competitive interactions between two successful molluscan invaders of freshwaters: an experimental study. Aquatic Ecology 38:83-91.

Dick, J. T. A. 2000. Invading predatory crustacean Dikerogammarus villosus eliminates both native and exotic species. Proceedings of the Royal Society B: Biological Sciences 267:977-983.

Elvira, B., G. Gnicola, and A. Almodovar. 1996. Pike and red swamp crayfish: a new case on predator-prey relationship between aliens in central Spain. Journal of fish biology 48:437-446.

Ermgassen, P. S. E. Z. and D. C. Aldridge. 2011. Predation by the invasive American signal crayfish, Pacifastacus leniusculus Dana, on the invasive zebra mussel, Dreissena polymorpha Pallas: the potential for control and facilitation. Hydrobiologia 658:303-315.

Goldwater, N., G. L. W. Perry, and M. N. Clout. 2012. Responses of house mice to the removal of mammalian predators and competitors. Austral Ecology 37:971-979.

Gomez, S., L. Gonda-King, C. M. Orians, and E. L. Preisser. 2014. Competitor avoidance drives within-host feeding site selection in a passively dispersed herbivore. Ecological Entomology 39:10-16.

Green, P. T., D. J. O'Dowd, K. L. Abbott, M. Jeffery, K. Retallick, and R. Mac Nally. 2011. Invasional meltdown: Invader-invader mutualism facilitates a secondary invasion. Ecology 92:1758-1768.

Griffen, B. D. 2006. Detecting emergent effects of multiple predator species. Oecologia 148:702-709.

Griffen, B. D., I. Altman, J. Hurley, and H. Mosblack. 2011. Reduced fecundity by one invader in the presence of another: A potential mechanism leading to species replacement. Journal of Experimental Marine Biology and Ecology 406:6-13.

Griffen, B. D. and J. E. Byers. 2008. Community impacts of two invasive crabs: the interactive roles of density, prey recruitment and indirect effects. Biological Invasions 11:927-940.

Griffen, B. D., T. Guy, and J. C. Buck. 2008. Inhibition between invasives: a newly introduced predator moderates the impacts of a previously established invasive predator. Journal of Animal Ecology 77:32-40.

Grosholz, E. D. 2005. Recent biological invasion may hasten invasional meltdown by accelerating historical introductions. Proceedings of the National Academy of Sciences 102:1088-1091.

Harper, G. A. and L. F. Cabrera. 2010. Response of mice (Mus musculus) to the removal of black rats (Rattus rattus) in arid forest on Santa Cruz Island, Galapagos. Biological Invasions 12:1449-1452.

Haynes, J. M., T. W. Stewart, and G. E. Cook. 1999. Benthic macroinvertebrate communities in southwestern Lake Ontario following invasion of Dreissena: Continuing change. Journal of Great Lakes Research 25:828-838.

Helms, K. R., C. P. Hayden, and S. B. Vinson. 2011. Plant-based food resources, trophic interactions among alien species, and the abundance of an invasive ant. Biological Invasions 13:67-79.

Hervias, S., A. Henriques, N. Oliveira, T. Pipa, H. Cowen, J. A. Ramos, M. Nogales, P. Geraldes, C. Silva, R. Ruiz de Ybanez, and S. Oppel. 2013. Studying the effects of multiple invasive mammals on Cory's shearwater nest survival. Biological Invasions 15:143-155.

Holomuzki, J. R. 2010. Within-reach spatial variability of snails and molluscivory by brown trout. New Zealand Journal of Marine and Freshwater Research 44:189-197.

Hudina, S., N. Galic, I. Roessink, and K. Hock. 2011. Competitive interactions between co-occurring invaders: identifying asymmetries between two invasive crayfish species. Biological Invasions 13:1791-1803.

Jackson, M. C. and J. R. Britton. 2014. Divergence in the trophic niche of sympatric freshwater invaders. Biological Invasions 16:1095-1103.

Jackson, M. C., A. L. Jackson, J. R. Britton, I. Donohue, D. Harper, and J. Grey. 2012. Population-level metrics of trophic structure based on stable isotopes and their application to invasion ecology. PLoS ONE 7:e31757.

Jackson, M. C., T. Jones, M. Milligan, D. Sheath, J. Taylor, A. Ellis, J. England, and J. Grey. 2014. Niche differentiation among invasive crayfish and their impacts on ecosystem structure and functioning. Freshwater Biology 59:1123-1135.

Jensen, G. C., P. S. McDonald, and D. A. Armstrong. 2002. East meets west: competitive interactions between green crab Carcinus maenas, and native and introduced shore crab Hemigrapsus spp. Marine Ecology Progress Series 225:251-262.

Johnson, P., J. Olden, C. Solomon, and M. Vander Zanden. 2009. Interactions among invaders: community and ecosystem effects of multiple invasive species in an experimental aquatic system. Oecologia 159:161-170.

Kestrup, A. and A. Ricciardi. 2009. Are interactions among Ponto-Caspian invaders driving amphipod species replacement in the St. Lawrence River? Journal of Great Lakes Research 35:392-398.

Kiesecker, J. M. and A. R. Blaustein. 1998. Effects of introduced bullfrogs and smallmouth bass on microhabitat use, growth, and survival of native red-legged frogs (Rana aurora). Conservation Biology 12:776-787.

Kinzler, W., A. Kley, G. Mayer, D. Waloszek, and G. Maier. 2009. Mutual predation between and cannibalism within several freshwater gammarids: Dikerogammarus villosus versus one native and three invasives. Aquatic Ecology 43:457-464.

Kley, A. and G. Maier. 2005. An example of niche partitioning between Dikerogammarus villosus and other invasive and native gammarids: a field study. Journal of Limnology 64:85-88.

Kobak, J., M. Poznanska, and T. Kakareko. 2012. Behavioural changes of zebra mussel Dreissena polymorpha (Bivalvia) induced by Ponto-Caspian gammarids. Biological Invasions 14:1851-1863.

Kuhns, L. A. and M. B. Berg. 1999. Benthic invertebrate community responses to round goby (Neogobius melanostomus) and zebra mussel (Dreissena polymorpha) invasion in southern Lake Michigan. Journal of Great Lakes Research 25:910-917.

Lawler, S. P., D. Dritz, T. Strange, and M. Holyoak. 1999. Effects of introduced mosquitofish and bullfrogs on the threatened California red-legged frog. Conservation Biology 13:613-622.

LeBrun, E. G., J. Abbott, and L. E. Gilbert. 2013. Imported crazy ant displaces imported fire ant, reduces and homogenizes grassland ant and arthropod assemblages. Biological Invasions 15:2429-2442.

LeBrun, E. G., N. T. Jones, and L. E. Gilbert. 2014. Chemical Warfare Among Invaders: A Detoxification Interaction Facilitates an Ant Invasion. Science 343:1014-1017.